AS  Vol.12 No.3 , March 2021
Effects of Biochar Application on Soil Properties, Plant Biomass Production, and Soil Greenhouse Gas Emissions: A Mini-Review
Abstract: Biochar has been applied extensively as a soil amendment over the past decades. This review summarizes the general findings of the impacts of biochar application on different aspects from soil physical, chemical, and microbial properties, to soil nutrient availabilities, plant growth, biomass production and yield, greenhouse gases (GHG) emissions, and soil carbon sequestration. Due to different biochar pyrolysis conditions, feedstock types, biochar application rates and methods, and potential interactions with other factors such as plant species and soil nutrient conditions, results from those studies are not inclusive. However, most studies reported positive effects of biochar application on soil physical and chemical properties, soil microbial activities, plant biomass and yield, and potential reductions of soil GHG emissions. A framework of biochar impacts is summarized, and possible mechanisms are discussed. Further research of biochar application in agriculture is called to verify the proposed mechanisms involved in biochar-soil-microbial-plant interactions for soil carbon sequestration and crop biomass and yield improvements.
Cite this paper: Hui, D. (2021) Effects of Biochar Application on Soil Properties, Plant Biomass Production, and Soil Greenhouse Gas Emissions: A Mini-Review. Agricultural Sciences, 12, 213-236. doi: 10.4236/as.2021.123014.

[1]   Lehmann, J. (2007) Bio-Energy in the Black. Frontiers in Ecology and the Environment, 5, 381-387.[381:BITB]2.0.CO;2

[2]   Laird, D.A., Brown, R.C., Amonette, J.E. and Lehmann, J. (2009) Review of the Pyrolysis Platform for Coproducing Bio-Oil and Biochar. Biofuels Bioproducts & Biorefining, 3, 547-562.

[3]   Thomas, S.C. and Gale, N. (2015) Biochar and Forest Restoration: A Review and Meta-Analysis of Tree Growth Responses. New Forests, 46, 931-946.

[4]   Gluszek, S., Sas-Paszt, L., Sumorok, B. and Kozera, R. (2017) Biochar-Rhizosphere Interactions—A Review. Polish Journal of Microbiology, 66, 151-161.

[5]   Arif, M., Ilyas, M., Riaz, M., Ali, K., Shan, K., Haq, I.U. and Fahad, S. (2017) Biochar Improves Phosphorus Use Efficiency of Organic-Inorganic Fertilizers, Maize-Wheat Productivity and Soil Quality in a Low Fertility Alkaline Soil. Field Crops Research, 214, 25-37.

[6]   Chan, K.Y., Van Zwieten, L., Meszaros, I., Downie, A. and Joseph, S. (2008) Using Poultry Litter Biochars as Soil Amendments. Australian Journal of Soil Research, 46, 437-444.

[7]   Bridgwater, A.V. and Peacocke, G.V.C. (2000) Fast Pyrolysis Processes for Biomass. Renewable & Sustainable Energy Reviews, 4, 1-73.

[8]   Ding, Z.H., Wan, Y.S., Hu, X., Wang, S.S., Zimmerman, A.R. and Gao, B. (2016) Sorption of Lead and Methylene Blue onto Hickory Biochars from Different Pyrolysis Temperatures: Importance of Physicochemical Properties. Journal of Industrial and Engineering Chemistry, 37, 261-267.

[9]   Xiang, Y.Z., Deng, Q., Duan, H.L. and Guo, Y. (2017) Effects of Biochar Application on Root Traits: A Meta-Analysis. Global Change Biology Bioenergy, 9, 1563-1572.

[10]   Schmidt, M.W.I., Skjemstad, J.O. and Jager, C. (2002) Carbon Isotope Geochemistry and Nanomorphology of Soil Black Carbon: Black Chernozemic Soils in Central Europe Originate from Ancient Biomass Burning. Global Biogeochemical Cycles, 16, 70-1-70-8.

[11]   Joseph, S.D., Camps-Arbestain, M., Lin, Y., Munroe, P., Chia, C.H., Hook, J., van Zwieten, L., Kimber, S., Cowie, A., Singh, B.P., et al. (2010) An Investigation into the Reactions of Biochar in Soil. Australian Journal of Soil Research, 48, 501-515.

[12]   Bruun, E.W., Hauggaard-Nielsen, H., Ibrahim, N., Egsgaard, H., Ambus, P., Jensen, P.A. and Dam-Johansen, K. (2011) Influence of Fast Pyrolysis Temperature on Biochar Labile Fraction and Short-Term Carbon Loss in a Loamy Soil. Biomass & Bioenergy, 35, 1182-1189.

[13]   Lehmann, J., Rillig, M.C., Thies, J., Masiello, C.A., Hockaday, W.C. and Crowley, D. (2011) Biochar Effects on Soil Biota—A Review. Soil Biology & Biochemistry, 43, 1812-1836.

[14]   Atkinson, C.J., Fitzgerald, J.D. and Hipps, N.A. (2010) Potential Mechanisms for Achieving Agricultural Benefits from Biochar Application to Temperate Soils: A Review. Plant and Soil, 337, 1-18.

[15]   Kammann, C.I., Schmidt, H.P., Messerschmidt, N., Linsel, S., Steffens, D., Muller, C., Koyro, H.W., Conte, P. and Stephen, J. (2015) Plant Growth Improvement Mediated by Nitrate Capture in Co-Composted Biochar. Scientific Reports, 5, Article No. 12378.

[16]   Biederman, L.A. and Harpole, W.S. (2013) Biochar and Its Effects on Plant Productivity and Nutrient Cycling: A Meta-Analysis. Global Change Biology Bioenergy, 5, 202-214.

[17]   Novak, J.M., Busscher, W.J., Watts, D.W., Laird, D.A., Ahmedna, M.A. and Niandou, M.A.S. (2010) Short-Term CO2 Mineralization after Additions of Biochar and Switchgrass to a Typic Kandiudult. Geoderma, 154, 281-288.

[18]   Lehmann, J., Gaunt, J. and Rondon, M. (2006) Bio-Char Sequestration in Terrestrial Ecosystems—A Review. Mitigation and Adaptation Strategies for Global Change, 11, 403-427.

[19]   Wardle, D.A., Nilsson, M.C. and Zackrisson, O. (2008) Fire-Derived Charcoal Causes Loss of Forest Humus. Science, 320, 629-629.

[20]   Enders, A., Hanley, K., Whitman, T., Joseph, S. and Lehmann, J. (2012) Characterization of Biochars to Evaluate Recalcitrance and Agronomic Performance. Bioresource Technology, 114, 644-653.

[21]   Zhang, C.J., Clark, G.J., Patti, A.F., Bolan, N., Cheng, M.M., Sale, P.W.G. and Tang, C.X. (2015) Contrasting Effects of Organic Amendments on Phytoextraction of Heavy Metals in a Contaminated Sediment. Plant and Soil, 397, 331-345.

[22]   Chen, B.L., Zhou, D.D. and Zhu, L.Z. (2008) Transitional Adsorption and Partition of Nonpolar and Polar Aromatic Contaminants by Biochars of Pine Needles with Different Pyrolytic Temperatures. Environmental Science & Technology, 42, 5137-5143.

[23]   Woolf, D., Amonette, J.E., Street-Perrott, F.A., Lehmann, J. and Joseph, S. (2010) Sustainable Biochar to Mitigate Global Climate Change. Nature Communications, 1, 56.

[24]   Case, S.D.C., McNamara, N.P., Reay, D.S. and Whitaker, J. (2012) The Effect of Biochar Addition on N2O and CO2 Emissions from a Sandy Loam Soil—The Role of Soil Aeration. Soil Biology & Biochemistry, 51, 125-134.

[25]   Liu, X.Y., Zheng, J.F., Zhang, D.X., Cheng, K., Zhou, H.M., Zhang, A., Li, L.Q., Joseph, S., Smith, P., Crowley, D., et al. (2016) Biochar Has No Effect on Soil Respiration across Chinese Agricultural Soils. Science of the Total Environment, 554, 259-265.

[26]   Ding, Y., Liu, Y.G., Liu, S.B., Li, Z.W., Tan, X.F., Huang, X.X., Zeng, G.M., Zhou, L. and Zheng, B.H. (2016) Biochar to Improve Soil Fertility. A Review. Agronomy for Sustainable Development, 36, Article No. 36.

[27]   Liu, S.W., Zhang, Y.J., Zong, Y.J., Hu, Z.Q., Wu, S., Zhou, J., Jin, Y.G. and Zou, J.W. (2016) Response of Soil Carbon Dioxide Fluxes, Soil Organic Carbon and Microbial Biomass Carbon to Biochar Amendment: A Meta-Analysis. Global Change Biology Bioenergy, 8, 392-406.

[28]   Ding, F., Van Zwieten, L., Zhang, W.D., Weng, Z., Shi, S.W., Wang, J.K. and Meng, J. (2018) A Meta-Analysis and Critical Evaluation of Influencing Factors on Soil Carbon Priming Following Biochar Amendment. Journal of Soils and Sediments, 18, 1507-1517.

[29]   Sohi, S.P., Krull, E., Lopez-Capel, E. and Bol, R. (2010) A Review of Biochar and Its Use and Function in Soil. Advances in Agronomy, 105, 47-82.

[30]   Liu, N., Zhou, C.J., Fu, S.F., Ashraf, M.I., Zhao, E.F., Shi, H. and Han, X.R. (2013) Study on Characteristics of Ammonium Nitrogen Adsorption by Biochar Prepared in Different Temperature. Applied Energy Technology, Pts 1 and 2, 724-725, 452-456.

[31]   Wang, D.Y., Griffin, D.E., Parikh, S.J. and Scow, K.M. (2016) Impact of Biochar Amendment on Soil Water Soluble Carbon in the Context of Extreme Hydrological Events. Chemosphere, 160, 287-292.

[32]   Crane-Droesch, A., Abiven, S., Jeffery, S. and Torn, M.S. (2013) Heterogeneous Global Crop Yield Response to Biochar: A Meta-Regression Analysis. Environmental Research Letters, 8, Article ID: 044049.

[33]   Mukherjee, A., Lal, R. and Zimmerman, A.R. (2014) Impacts of 1.5-Year Field Aging on Biochar, Humic Acid, and Water Treatment Residual Amended Soil. Soil Science, 179, 333-339.

[34]   Xu, C.Y., Hosseini-Bai, S., Hao, Y.B., Rachaputi, R.C.N., Wang, H.L., Xu, Z.H. and Wallace, H. (2015) Effect of Biochar Amendment on Yield and Photosynthesis of Peanut on Two Types of Soils. Environmental Science and Pollution Research, 22, 6112-6125.

[35]   He, H.Z., Pan, J.J., Yu, P.F., Chen, G.K. and Lu, H.S. (2017) Effects of Hybrid Giant Napier Biochar on Cadmium Migration in a Cabbage-Soil System Contaminated with Cadmium and Butachlor. Polish Journal of Environmental Studies, 26, 619-625.

[36]   Darby, I., Xu, C.Y., Wallace, H.M., Joseph, S., Pace, B. and Bai, S.H. (2016) Short-Term Dynamics of Carbon and Nitrogen Using Compost, Compost-Biochar Mixture and Organo-Mineral Biochar. Environmental Science and Pollution Research, 23, 11267-11278.

[37]   Ameloot, N., Neve, S., Jegajeevagan, K., Yildiz, G., Buchan, D., Funkuin, Y.N., Prins, W., Bouckaert, L. and Sleutel, S. (2013) Short-Term CO2 and N2O Emissions and Microbial Properties of Biochar Amended Sandy Loam Soils. Soil Biology & Biochemistry, 57, 401-410.

[38]   Zhu, L.X., Xiao, Q., Cheng, H.Y., Shi, B.J., Shen, Y.F. and Li, S.Q. (2017) Seasonal Dynamics of Soil Microbial Activity after Biochar Addition in a Dryland Maize Field in North-Western China. Ecological Engineering, 104, 141-149.

[39]   Jeffery, S., Verheijen, F.G.A., van der Velde, M. and Bastos, A.C. (2011) A Quantitative Review of the Effects of Biochar Application to Soils on Crop Productivity Using Meta-Analysis. Agriculture Ecosystems & Environment, 144, 175-187.

[40]   Noguera, D., Barot, S., Laossi, K.R., Cardoso, J., Lavelle, P. and de Carvalho, M.H.C. (2012) Biochar But Not Earthworms Enhances Rice Growth through Increased Protein Turnover. Soil Biology & Biochemistry, 52, 13-20.

[41]   Wang, X.B., Song, D.L., Liang, G.Q., Zhang, Q., Ai, C. and Zhou, W. (2015) Maize Biochar Addition Rate Influences Soil Enzyme Activity and Microbial Community Composition in a Fluvo-Aquic Soil. Applied Soil Ecology, 96, 265-272.

[42]   Quilliam, R.S., DeLuca, T.H. and Jones, D.L. (2013) Biochar Application Reduces Nodulation But Increases Nitrogenase Activity in Clover. Plant and Soil, 366, 83-92.

[43]   Lehmann, J. and Joseph, S. (2015) Biochar for Environmental Management: Science, Technology and Implementation. Routledge, London.

[44]   Baiamonte, G., De Pasquale, C., Marsala, V., Cimo, G., Alonzo, G., Crescimanno, G. and Conte, P. (2015) Structure Alteration of a Sandy-Clay Soil by Biochar Amendments. Journal of Soils and Sediments, 15, 816-824.

[45]   Van Zwieten, L., Kimber, S., Morris, S., Chan, K.Y., Downie, A., Rust, J., Joseph, S. and Cowie, A. (2010) Effects of Biochar from Slow Pyrolysis of Papermill Waste on Agronomic Performance and Soil Fertility. Plant and Soil, 327, 235-246.

[46]   Oguntunde, P.G., Fosu, M., Ajayi, A.E. and van de Giesen, N. (2004) Effects of Charcoal Production on Maize Yield, Chemical Properties and Texture of Soil. Biology and Fertility of Soils, 39, 295-299.

[47]   Chan, K.Y., Van Zwieten, L., Meszaros, I., Downie, A. and Joseph, S. (2007) Agronomic Values of Greenwaste Biochar as a Soil Amendment. Australian Journal of Soil Research, 45, 629-634.

[48]   Rogovska, N., Laird, D.A., Rathke, S.J. and Karlen, D.L. (2014) Biochar Impact on Midwestern Mollisols and Maize Nutrient Availability. Geoderma, 230, 340-347.

[49]   Foster, E.J., Hansen, N., Wallenstein, M. and Cotrufo, M.F. (2016) Biochar and Manure Amendments Impact Soil Nutrients and Microbial Enzymatic Activities in a Semi-Arid Irrigated Maize Cropping System. Agriculture Ecosystems & Environment, 233, 404-414.

[50]   Deluca, T., Fajvan, M.A. and Miller, G. (2009) Diameter-Limit Harvesting: Effects of Residual Trees on Regeneration Dynamics in Appalachian Hardwoods. Northern Journal of Applied Forestry, 26, 52-60.

[51]   Laird, D.A., Fleming, P., Davis, D.D., Horton, R., Wang, B.Q. and Karlen, D.L. (2010) Impact of Biochar Amendments on the Quality of a Typical Midwestern Agricultural Soil. Geoderma, 158, 443-449.

[52]   Ojeda, G., Mattana, S., Avila, A., Alcaniz, J.M., Volkmann, M. and Bachmann, J. (2015) Are Soil-Water Functions Affected by Biochar Application? Geoderma, 249, 1-11.

[53]   Güereña, D., Lehmann, J., Hanley, K., Enders, A., Hyland, C. and Riha, S. (2013) Nitrogen Dynamics Following Field Application of Biochar in a Temperate North American Maize-Based Production System. Plant and Soil, 365, 239-254.

[54]   Brantley, K.E., Savin, M.C., Brye, K.R. and Longer, D.E. (2015) Pine Woodchip Biochar Impact on Soil Nutrient Concentrations and Corn Yield in a Silt Loam in the Mid-Southern U.S. Agriculture-Basel, 5, 30-47.

[55]   Cayuela, M.L., Sanchez-Monedero, M.A., Roig, A., Hanley, K., Enders, A. and Lehmann, J. (2013) Biochar and Denitrification in Soils: When, How Much and Why Does Biochar Reduce N2O Emissions? Scientific Reports, 3, Article No. 1732.

[56]   Lan, Z.M., Chen, C.R., Rashti, M.R., Yang, H. and Zhang, D.K. (2017) Stoichiometric Ratio of Dissolved Organic Carbon to Nitrate Regulates Nitrous Oxide Emission from the Biochar-Amended Soils. Science of the Total Environment, 576, 559-571.

[57]   Gul, S., Whalen, J.K., Thomas, B.W., Sachdeva, V. and Deng, H.Y. (2015) Physico-Chemical Properties and Microbial Responses in Biochar-Amended Soils: Mechanisms and Future Directions. Agriculture Ecosystems & Environment, 206, 46-59.

[58]   Paz-Ferreiro, J., Gasco, G., Gutierrez, B. and Mendez, A. (2012) Soil Biochemical Activities and the Geometric Mean of Enzyme Activities after Application of Sewage Sludge and Sewage Sludge Biochar to Soil. Biology and Fertility of Soils, 48, 511-517.

[59]   Graber, E.R., Harel, Y.M., Kolton, M., Cytryn, E., Silber, A., David, D.R., Tsechansky, L., Borenshtein, M. and Elad, Y. (2010) Biochar Impact on Development and Productivity of Pepper and Tomato Grown in Fertigated Soilless Media. Plant and Soil, 337, 481-496.

[60]   Fox, A., Gahan, J., Ikoyi, I., Kwapinski, W., O’Sullivan, O., Cotter, P.D. and Schmalenberger, A. (2016) Miscanthus Biochar Promotes Growth of Spring Barley and Shifts Bacterial Community Structures Including Phosphorus and Sulfur Mobilizing Bacteria. Pedobiologia, 59, 195-202.

[61]   Wang, J.Y., Dokohely, M.E., Xiong, Z.Q. and Kuzyakov, Y. (2016) Contrasting Effects of Aged and Fresh Biochars on Glucose-Induced Priming and Microbial Activities in Paddy Soil. Journal of Soils and Sediments, 16, 191-203.

[62]   Mitchell, P.J., Simpson, A.J., Soong, R. and Simpson, M.J. (2015) Shifts in Microbial Community and Water-Extractable Organic Matter Composition with Biochar Amendment in a Temperate Forest Soil. Soil Biology & Biochemistry, 81, 244-254.

[63]   Warnock, D.D., Mummey, D.L., McBride, B., Major, J., Lehmann, J. and Rillig, M.C. (2010) Influences of Non-Herbaceous Biochar on Arbuscular Mycorrhizal Fungal Abundances in Roots and Soils: Results from Growth-Chamber and Field Experiments. Applied Soil Ecology, 46, 450-456.

[64]   Gryndler, M., Larsen, J., Hrselova, H., Rezacova, V., Gryndlerova, H. and Kubat, J. (2006) Organic and Mineral Fertilization, Respectively, Increase and Decrease the Development of External Mycelium of Arbuscular Mycorrhizal Fungi in a Long-Term Field Experiment. Mycorrhiza, 16, 159-166.

[65]   Ishii, T. and Kadoya, K. (1994) Effects of Charcoal as a Soil Conditioner on Citrus Growth and Vesicular-Arbuscular Mycorrhizal Development. Journal of the Japanese Society for Horticultural Science, 63, 529-535.

[66]   Rillig, M.C., Wagner, M., Salem, M., Antunes, P.M., George, C., Ramke, H.G., Titirici, M.M. and Antonietti, M. (2010) Material Derived from Hydrothermal Carbonization: Effects on Plant Growth and Arbuscular Mycorrhiza. Applied Soil Ecology, 45, 238-242.

[67]   Thies, J.E. and Rillig, M.C. (2009) Characteristics of Biochar: Biochar Properties. In: Lehmann, J. and Joseph, S., Eds., Biochar for Environmental Management Science and Technology, Earthscan, London, 85-105.

[68]   Kuzyakov, Y., Subbotina, I., Chen, H.Q., Bogomolova, I. and Xu, X.L. (2009) Black Carbon Decomposition and Incorporation into Soil Microbial Biomass Estimated by C-14 Labeling. Soil Biology & Biochemistry, 41, 210-219.

[69]   Knicker, H., Muffler, P. and Hilscher, A. (2007) How Useful Is Chemical Oxidation with Dichromate for the Determination of “Black Carbon” in Fire-Affected Soils? Geoderma, 142, 178-196.

[70]   Kolb, S.E., Fermanich, K.J. and Dornbush, M.E. (2009) Effect of Charcoal Quantity on Microbial Biomass and Activity in Temperate Soils. Soil Science Society of America Journal, 73, 1173-1181.

[71]   Steiner, C., Glaser, B., Teixeira, W.G., Lehmann, J., Blum, W.E.H. and Zech, W. (2008) Nitrogen Retention and Plant Uptake on a Highly Weathered Central Amazonian Ferralsol Amended with Compost and Charcoal. Journal of Plant Nutrition and Soil Science, 171, 893-899.

[72]   Chintala, R., Schumacher, T.E., Kumar, S., Malo, D.D., Rice, J.A., Bleakley, B., Chilom, G., Clay, D.E., Julson, J.L., Papiernik, S.K., et al. (2014) Molecular Characterization of Biochars and Their Influence on Microbiological Properties of Soil. Journal of Hazardous Materials, 279, 244-256.

[73]   Bailey, V.L., Fansler, S.J., Smith, J.L. and Bolton, H. (2011) Reconciling Apparent Variability in Effects of Biochar Amendment on Soil Enzyme Activities by Assay Optimization. Soil Biology & Biochemistry, 43, 296-301.

[74]   Domene, X., Mattana, S., Hanley, K., Enders, A. and Lehmann, J. (2014) Medium-Term Effects of Corn Biochar Addition on Soil Biota Activities and Functions in a Temperate Soil Cropped to Corn. Soil Biology & Biochemistry, 72, 152-162.

[75]   Grandy, A.S. and Neff, J.C. (2008) Molecular C Dynamics Downstream: The Biochemical Decomposition Sequence and Its Impact on Soil Organic Matter Structure and Function. Science of the Total Environment, 404, 297-307.

[76]   Lin, Y., Munroe, P., Joseph, S., Henderson, R. and Ziolkowski, A. (2012) Water Extractable Organic Carbon in Untreated and Chemical Treated Biochars. Chemosphere, 87, 151-157.

[77]   Demisie, W., Liu, Z.Y. and Zhang, M.K. (2014) Effect of Biochar on Carbon Fractions and Enzyme Activity of Red Soil. Catena, 121, 214-221.

[78]   Liang, B.Q., Lehmann, J., Sohi, S.P., Thies, J.E., O’Neill, B., Trujillo, L., Gaunt, J., Solomon, D., Grossman, J., Neves, E.G., et al. (2010) Black Carbon Affects the Cycling of Non-Black Carbon in Soil. Organic Geochemistry, 41, 206-213.

[79]   Liang, B., Lehmann, J., Solomon, D., Sohi, S., Thies, J.E., Skjemstad, J.O., Luizao, F.J., Engelhard, M.H., Neves, E.G. and Wirick, S. (2008) Stability of Biomass-Derived Black Carbon in Soils. Geochimica et Cosmochimica Acta, 72, 6069-6078.

[80]   Liao, N., Li, Q., Zhang, W., Zhou, G.W., Ma, L.J., Min, W., Ye, J. and Hou, Z.N. (2016) Effects of Biochar on Soil Microbial Community Composition and Activity in Drip-Irrigated Desert Soil. European Journal of Soil Biology, 72, 27-34.

[81]   Jindo, K., Sanchez-Monedero, M.A., Hernandez, T., Garcia, C., Furukawa, T., Matsumoto, K., Sonoki, T. and Bastida, F. (2012) Biochar Influences the Microbial Community Structure during Manure Composting with Agricultural Wastes. Science of the Total Environment, 416, 476-481.

[82]   Tian, J., Wang, J.Y., Dippold, M., Gao, Y., Blagodatskaya, E. and Kuzyakov, Y. (2016) Biochar Affects Soil Organic Matter Cycling and Microbial Functions but Does Not Alter Microbial Community Structure in a Paddy Soil. Science of the Total Environment, 556, 89-97.

[83]   Spokas, K.A., Cantrell, K.B., Novak, J.M., Archer, D.W., Ippolito, J.A., Collins, H.P., Boateng, A.A., Lima, I.M., Lamb, M.C., McAloon, A.J., et al. (2012) Biochar: A Synthesis of Its Agronomic Impact beyond Carbon Sequestration. Journal of Environmental Quality, 41, 973-989.

[84]   Warnock, D.D., Lehmann, J., Kuyper, T.W. and Rillig, M.C. (2007) Mycorrhizal Responses to Biochar in Soil—Concepts and Mechanisms. Plant and Soil, 300, 9-20.

[85]   Anderson, C.R., Condron, L.M., Clough, T.J., Fiers, M., Stewart, A., Hill, R.A. and Sherlock, R.R. (2011) Biochar Induced Soil Microbial Community Change: Implications for Biogeochemical Cycling of Carbon, Nitrogen and Phosphorus. Pedobiologia, 54, 309-320.

[86]   Gaskin, J.W., Steiner, C., Harris, K., Das, K.C. and Bibens, B. (2008) Effect of Low-Temperature Pyrolysis Conditions on Biochar for Agricultural Use. Transactions of the Asabe, 51, 2061-2069.

[87]   Gundale, M.J. and DeLuca, T.H. (2007) Charcoal Effects on Soil Solution Chemistry and Growth of Koeleria Macrantha in the Ponderosa Pine/Douglas-Fir Ecosystem. Biology and Fertility of Soils, 43, 303-311.

[88]   Silber, A., Levkovitch, I. and Graber, E.R. (2010) pH-Dependent Mineral Release and Surface Properties of Cornstraw Biochar: Agronomic Implications. Environmental Science & Technology, 44, 9318-9323.

[89]   Ameloot, N., Sleutel, S., Das, K.C., Kanagaratnam, J. and de Neve, S. (2015) Biochar Amendment to Soils with Contrasting Organic Matter Level: Effects on N Mineralization and Biological Soil Properties. Global Change Biology Bioenergy, 7, 135-144.

[90]   Lentz, R.D., Ippolito, J.A. and Spokas, K.A. (2014) Biochar and Manure Effects on Net Nitrogen Mineralization and Greenhouse Gas Emissions from Calcareous Soil under Corn. Soil Science Society of America Journal, 78, 1641-1655.

[91]   Gaskin, J.W., Speir, R.A., Harris, K., Das, K.C., Lee, R.D., Morris, L.A. and Fisher, D.S. (2010) Effect of Peanut Hull and Pine Chip Biochar on Soil Nutrients, Corn Nutrient Status, and Yield. Agronomy Journal, 102, 623-633.

[92]   Rondon, M.A., Lehmann, J., Ramirez, J. and Hurtado, M. (2007) Biological Nitrogen Fixation by Common Beans (Phaseolus vulgaris L.) Increases with Bio-Char Additions. Biology and Fertility of Soils, 43, 699-708.

[93]   Glaser, B., Wiedner, K., Seelig, S., Schmidt, H.P. and Gerber, H. (2015) Biochar Organic Fertilizers from Natural Resources as Substitute for Mineral Fertilizers. Agronomy for Sustainable Development, 35, 667-678.

[94]   Nelissen, V., Rutting, T., Huygens, D., Staelens, J., Ruysschaert, G. and Boeckx, P. (2012) Maize Biochars Accelerate Short-Term Soil Nitrogen Dynamics in a Loamy Sand Soil. Soil Biology & Biochemistry, 55, 20-27.

[95]   Mia, S., van Groenigen, J.W., van de Voorde, T.F.J., Oram, N.J., Bezemer, T.M., Mommer, L. and Jeffery, S. (2014) Biochar Application Rate Affects Biological Nitrogen Fixation in Red Clover Conditional on Potassium Availability. Agriculture Ecosystems & Environment, 191, 83-91.

[96]   Gonzalez, M.E., Cea, M., Medina, J., Gonzalez, A., Diez, M.C., Cartes, P., Monreal, C. and Navia, R. (2015) Evaluation of Biodegradable Polymers as Encapsulating Agents for the Development of a Urea Controlled-Release Fertilizer Using Biochar as Support Material. Science of the Total Environment, 505, 446-453.

[97]   Houben, D., Sonnet, P. and Cornelis, J.T. (2014) Biochar from Miscanthus: A Potential Silicon Fertilizer. Plant and Soil, 374, 871-882.

[98]   Vassilev, N., Martos, E., Mendes, G., Martos, V. and Vassileva, M. (2013) Biochar of Animal Origin: A Sustainable Solution to the Global Problem of High-Grade Rock Phosphate Scarcity? Journal of the Science of Food and Agriculture, 93, 1799-1804.

[99]   Siebers, N., Godlinski, F. and Leinweber, P. (2014) Bone Char as Phosphorus Fertilizer Involved in Cadmium Immobilization in Lettuce, Wheat, and Potato Cropping. Journal of Plant Nutrition and Soil Science, 177, 75-83.

[100]   Dunisch, O., Lima, V.C., Seehann, G., Donath, J., Montoia, V.R. and Schwarz, T. (2007) Retention Properties of Wood Residues and Their Potential for Soil Amelioration. Wood Science and Technology, 41, 169-189.

[101]   Edelstein, D.M. and Tonjes, D.J. (2012) Modeling an Improvement in Phosphorus Utilization in Tropical Agriculture. Journal of Sustainable Agriculture, 36, 18-35.

[102]   Cui, H.J., Wang, M.K., Fu, M.L. and Ci, E. (2011) Enhancing Phosphorus Availability in Phosphorus-Fertilized Zones by Reducing Phosphate Adsorbed on Ferrihydrite Using Rice Straw-Derived Biochar. Journal of Soils and Sediments, 11, 1135-1141.

[103]   Liu, X., Liu, M.D., Gao, Z.G. and Yang, D. (2013) Effect of Different Biochars on Yield and Yield Components of Wheat in Different Soils. Advances in Environmental Technologies, Pts 1-6, 726-731, 2665.

[104]   Glaser, B., Lehmann, J. and Zech, W. (2002) Ameliorating Physical and Chemical Properties of Highly Weathered Soils in the Tropics with Charcoal: A Review. Biology and Fertility of Soils, 35, 219-230.

[105]   Novak, J.M., Ippolito, J.A., Lentz, R.D., Spokas, K.A., Bolster, C.H., Sistani, K., Trippe, K.M., Phillips, C.L. and Johnson, M.G. (2016) Soil Health, Crop Productivity, Microbial Transport, and Mine Spoil Response to Biochars. Bioenergy Research, 9, 454-464.

[106]   Yamato, M., Okimori, Y., Wibowo, I.F., Anshori, S. and Ogawa, M. (2006) Effects of the Application of Charred Bark of Acacia mangium on the Yield of Maize, Cowpea and Peanut, and Soil Chemical Properties in South Sumatra, Indonesia. Soil Science and Plant Nutrition, 52, 489-495.

[107]   Prendergast-Miller, M.T., Duvall, M. and Sohi, S.P. (2014) Biochar-Root Interactions Are Mediated by Biochar Nutrient Content and Impacts on Soil Nutrient Availability. European Journal of Soil Science, 65, 173-185.

[108]   Noguera, D., Rondon, M., Laossi, K.R., Hoyos, V., Lavelle, P., de Carvalho, M.H.C. and Barot, S. (2010) Contrasted Effect of Biochar and Earthworms on Rice Growth and Resource Allocation in Different Soils. Soil Biology & Biochemistry, 42, 1017-1027.

[109]   Mukherjee, A. and Zimmerman, A.R. (2013) Organic Carbon and Nutrient Release from a Range of Laboratory-Produced Biochars and Biochar-Soil Mixtures. Geoderma, 193, 122-130.

[110]   Park, J.H., Choppala, G.K., Bolan, N.S., Chung, J.W. and Chuasavathi, T. (2011) Biochar Reduces the Bioavailability and Phytotoxicity of Heavy Metals. Plant and Soil, 348, 439-451.

[111]   Lashari, M.S., Liu, Y.M., Li, L.Q., Pan, W.N., Fu, J.Y., Pan, G.X., Zheng, J.F., Zheng, J.W., Zhang, X.H. and Yu, X.Y. (2013) Effects of Amendment of Biochar-Manure Compost in Conjunction with Pyroligneous Solution on Soil Quality and Wheat Yield of a Salt-Stressed Cropland from Central China Great Plain. Field Crops Research, 144, 113-118.

[112]   Major, J., Rondon, M., Molina, D., Riha, S.J. and Lehmann, J. (2010) Maize Yield and Nutrition during 4 Years after Biochar Application to a Colombian savanna Oxisol. Plant and Soil, 333, 117-128.

[113]   Mehmood, K., Li, J.Y., Jiang, J., Masud, M.M. and Xu, R.K. (2017) Effect of Low Energy-Consuming Biochars in Combination with Nitrate Fertilizer on Soil Acidity Amelioration and Maize Growth. Journal of Soils and Sediments, 17, 790-799.

[114]   Cornelissen, G., Rutherford, D.W., Arp, H.P.H., Dorsch, P., Kelly, C.N. and Rostad, C.E. (2013) Sorption of Pure N2O to Biochars and Other Organic and Inorganic Materials under Anhydrous Conditions. Environmental Science & Technology, 47, 7704-7712.

[115]   Obia, A., Mulder, J., Martinsen, V., Cornelissen, G. and Borresen, T. (2016) In Situ Effects of Biochar on Aggregation, Water Retention and Porosity in Light-Textured Tropical Soils. Soil & Tillage Research, 155, 35-44.

[116]   Uzoma, K.C., Inoue, M., Andry, H., Fujimaki, H., Zahoor, A. and Nishihara, E. (2011) Effect of Cow Manure Biochar on Maize Productivity under Sandy Soil Condition. Soil Use and Management, 27, 205-212.

[117]   Zhang, H.H., Lin, K.D., Wang, H.L. and Gan, J. (2010) Effect of Pinus radiata Derived Biochars on Soil Sorption and Desorption of Phenanthrene. Environmental Pollution, 158, 2821-2825.

[118]   Qin, X.B., Li, Y.E., Wang, H., Liu, C., Li, J.L., Wan, Y.F., Gao, Q.Z., Fan, F.L. and Liao, Y.L. (2016) Long-Term Effect of Biochar Application on Yield-Scaled Greenhouse Gas Emissions in a Rice Paddy Cropping System: A Four-Year Case Study in South China. Science of the Total Environment, 569, 1390-1401.

[119]   Wisnubroto, E., Hedley, M., Hina, K. and Camps-Arbestain, M. (2010) The Use of Biochar from Biosolids on Waitarere Sandy Soils: Effect on the Growth of Rye Grass. Proceedings of New Zealand Biochar Research Centre Workshop, Massey University, New Zealand, 10-11.

[120]   Asai, H., Samson, B.K., Stephan, H.M., Songyikhangsuthor, K., Homma, K., Kiyono, Y., Inoue, Y., Shiraiwa, T. and Horie, T. (2009) Biochar Amendment Techniques for Upland Rice Production in Northern Laos 1. Soil Physical Properties, Leaf SPAD and Grain Yield. Field Crops Research, 111, 81-84.

[121]   Steiner, C., Teixeira, W.G., Lehmann, J., Nehls, T., de Macedo, J.L.V., Blum, W.E.H. and Zech, W. (2007) Long Term Effects of Manure, Charcoal and Mineral Fertilization on Crop Production and Fertility on a Highly Weathered Central Amazonian Upland Soil. Plant and Soil, 291, 275-290.

[122]   Blackwell, P., Krull, E., Butler, G., Herbert, A. and Solaiman, Z. (2010) Effect of Banded Biochar on Dryland Wheat Production and Fertiliser Use in South-Western Australia: An Agronomic and Economic Perspective. Australian Journal of Soil Research, 48, 531-545.

[123]   Arif, M., Ali, K., Jan, M.T., Shah, Z., Jones, D.L. and Quilliam, R.S. (2016) Integration of Biochar with Animal Manure and Nitrogen for Improving Maize Yields and Soil Properties in Calcareous Semi-Arid Agroecosystems. Field Crops Research, 195, 28-35.

[124]   Zhang, J.X., Zhang, Z.F., Shen, G.M., Wang, R., Gao, L., Kong, F.Y. and Zhang, J.G. (2016) Growth Performance, Nutrient Absorption of Tobacco and Soil Fertility after Straw Biochar Application. International Journal of Agriculture and Biology, 18, 983-989.

[125]   Li, F.Y., Cao, X.D., Zhao, L., Wang, J.F. and Ding, Z.L. (2014) Effects of Mineral Additives on Biochar Formation: Carbon Retention, Stability, and Properties. Environmental Science & Technology, 48, 11211-11217.

[126]   Chavez, A., Ramaswami, A., Nath, D., Guru, R. and Kumar, E. (2012) Implementing Trans-Boundary Infrastructure-Based Greenhouse Gas Accounting for Delhi, India Data Availability and Methods. Journal of Industrial Ecology, 16, 814-828.

[127]   He, T.Y., Meng, J., Chen, W.F., Liu, Z.Q., Cao, T., Cheng, X.Y., Huang, Y.W. and Yang, X. (2017) Effects of Biochar on Cadmium Accumulation in Rice and Cadmium Fractions of Soil: A Three-Year Pot Experiment. Bioresources, 12, 622-642.

[128]   Cayuela, M.L., van Zwieten, L., Singh, B.P., Jeffery, S., Roig, A. and Sanchez-Monedero, M.A. (2014) Biochar’s Role in Mitigating Soil Nitrous Oxide Emissions: A Review and Meta-Analysis. Agriculture Ecosystems & Environment, 191, 5-16.

[129]   van Zwieten, L., Kimber, S., Downie, A., Morris, S., Petty, S., Rust, J. and Chan, K.Y. (2010) A Glasshouse Study on the Interaction of Low Mineral Ash Biochar with Nitrogen in a Sandy Soil. Australian Journal of Soil Research, 48, 569-576.

[130]   Jones, D.L., Murphy, D.V., Khalid, M., Ahmad, W., Edwards-Jones, G. and DeLuca, T.H. (2011) Short-Term Biochar-Induced Increase in Soil CO2 Release Is Both Biotically and Abiotically Mediated. Soil Biology & Biochemistry, 43, 1723-1731.

[131]   Yanai, Y., Toyota, K. and Okazaki, M. (2007) Effects of Charcoal Addition on N2O Emissions from Soil Resulting from Rewetting Air-Dried Soil in Short-Term Laboratory Experiments. Soil Science and Plant Nutrition, 53, 181-188.

[132]   Rogovska, N., Laird, D., Cruse, R., Fleming, P., Parkin, T. and Meek, D. (2011) Impact of Biochar on Manure Carbon Stabilization and Greenhouse Gas Emissions. Soil Science Society of America Journal, 75, 871-879.

[133]   Feng, Y.Z., Xu, Y.P., Yu, Y.C., Xie, Z.B. and Lin, X.G. (2012) Mechanisms of Biochar Decreasing Methane Emission from Chinese Paddy Soils. Soil Biology & Biochemistry, 46, 80-88.

[134]   Case, S.D.C., McNamara, N.P., Reay, D.S. and Whitaker, J. (2014) Can Biochar Reduce Soil Greenhouse Gas Emissions from a Miscanthus Bioenergy Crop? Global Change Biology Bioenergy, 6, 76-89.

[135]   Quin, P., Joseph, S., Husson, O., Donne, S., Mitchell, D., Munroe, P., Phelan, D., Cowie, A. and Van Zwieten, L. (2015) Lowering N2O Emissions from Soils Using Eucalypt Biochar: The Importance of Redox Reactions. Scientific Reports, 5, Article No. 16773.

[136]   Zhang, A.F., Liu, Y.M., Pan, G.X., Hussain, Q., Li, L.Q., Zheng, J.W. and Zhang, X.H. (2012) Effect of Biochar Amendment on Maize Yield and Greenhouse Gas Emissions from a Soil Organic Carbon Poor Calcareous Loamy Soil from Central China Plain. Plant and Soil, 351, 263-275.

[137]   Scheer, C., Grace, P.R., Rowlings, D.W., Kimber, S. and Van Zwieten, L. (2011) Effect of Biochar Amendment on the Soil-Atmosphere Exchange of Greenhouse Gases from an Intensive Subtropical Pasture in Northern New South Wales, Australia. Plant and Soil, 345, 47-58.

[138]   Spokas, K.A., Koskinen, W.C., Baker, J.M. and Reicosky, D.C. (2009) Impacts of Woodchip Biochar Additions on Greenhouse Gas Production and Sorption/Degradation of Two Herbicides in a Minnesota Soil. Chemosphere, 77, 574-581.

[139]   Kimetu, J.M. and Lehmann, J. (2010) Stability and Stabilisation of Biochar and Green Manure in Soil with Different Organic Carbon Contents. Australian Journal of Soil Research, 48, 577-585.

[140]   Lu, W.W., Ding, W.X., Zhang, J.H., Li, Y., Luo, J.F., Bolan, N. and Xie, Z.B. (2014) Biochar Suppressed the Decomposition of Organic Carbon in a Cultivated Sandy Loam Soil: A Negative Priming Effect. Soil Biology & Biochemistry, 76, 12-21.

[141]   Karhu, K., Mattila, T., Bergstrom, I. and Regina, K. (2011) Biochar Addition to Agricultural Soil Increased CH4 Uptake and Water Holding Capacity: Results from a Short-Term Pilot Field Study. Agriculture Ecosystems & Environment, 140, 309-313.

[142]   Hui, D., Yu, C.L., Deng, Q., Saini, P., Collins, K. and De Koff, J. (2018) Weak Effects of Biochar and Nitrogen Fertilization on Switchgrass Photosynthesis, Biomass, and Soil Respiration. Agriculture, 8, 12.

[143]   Singh, B.P. and Cowie, A.L. (2014) Long-Term Influence of Biochar on Native Organic Carbon Mineralisation in a Low-Carbon Clayey Soil. Scientific Reports, 4, Article No. 3687.

[144]   Trivedi, P., Anderson, I.C. and Singh, B.K. (2013) Microbial Modulators of Soil Carbon Storage: Integrating Genomic and Metabolic Knowledge for Global Prediction. Trends in Microbiology, 21, 641-651.

[145]   Cross, A. and Sohi, S.P. (2011) The Priming Potential of Biochar Products in Relation to Labile Carbon Contents and Soil Organic Matter Status. Soil Biology & Biochemistry, 43, 2127-2134.

[146]   Zimmerman, A.R., Gao, B. and Ahn, M.Y. (2011) Positive and Negative Carbon Mineralization Priming Effects among a Variety of Biochar-Amended Soils. Soil Biology & Biochemistry, 43, 1169-1179.

[147]   Bruun, S. and Luxhoi, J. (2008) Is Biochar Production Really Carbon-Negative? Environmental Science & Technology, 42, 1388-1388.

[148]   Cheng, C.H., Lehmann, J., Thies, J.E., Burton, S.D. and Engelhard, M.H. (2006) Oxidation of Black Carbon by Biotic and Abiotic Processes. Organic Geochemistry, 37, 1477-1488.

[149]   Cai, Z., Xing, G., Yan, X., Xu, H., Tsuruta, H., Yagi, K. and Minami, K. (1997) Methane and Nitrous Oxide Emissions from Rice Paddy Fields as Affected by Nitrogen Fertilisers and Water Management. Plant and Soil, 196, 7-14.

[150]   Cai, Z., Tsuruta, H. and Minami, K. (2000) Methane Emission from Rice Fields in China: Measurements and Influencing Factors. Journal of Geophysical Research: Atmospheres, 105, 17231-17242.

[151]   Xiong, Z.-Q., et al. (2007) Nitrous Oxide and Methane Emissions as Affected by Water, Soil and Nitrogen. Pedosphere, 17, 146-155.

[152]   Van Zwieten, L., Singh, B., Joseph, S., Kimber, S., Cowie, A. and Chan, K.Y. (2009) Biochar and Emissions of Non-CO2 Greenhouse Gases from Soil. Biochar for Environmental Management: Science and Technology, 1, 227-250.

[153]   Zhang, A.F., Cui, L.Q., Pan, G.X., Li, L.Q., Hussain, Q., Zhang, X.H., Zheng, J.W. and Crowley, D. (2010) Effect of Biochar Amendment on Yield and Methane and Nitrous Oxide Emissions from a Rice Paddy from Tai Lake Plain, China. Agriculture Ecosystems & Environment, 139, 469-475.

[154]   Knoblauch, C., Maarifat, A.A., Pfeiffer, E.M. and Haefele, S.M. (2011) Degradability of Black Carbon and Its Impact on Trace Gas Fluxes and Carbon Turnover in Paddy Soils. Soil Biology & Biochemistry, 43, 1768-1778.

[155]   Khan, S., Chao, C., Waqas, M., Arp, H.P.H. and Zhu, Y.G. (2013) Sewage Sludge Biochar Influence upon Rice (Oryza sativa L) Yield, Metal Bioaccumulation and Greenhouse Gas Emissions from Acidic Paddy Soil. Environmental Science & Technology, 47, 8624-8632.

[156]   Zhao, L., Zheng, W. and Cao, X.D. (2014) Distribution and Evolution of Organic Matter Phases during Biochar Formation and Their Importance in Carbon Loss and Pore Structure. Chemical Engineering Journal, 250, 240-247.

[157]   Rondon, M., Ramirez, J. and Lehmann, J. (2006) Charcoal Additions Reduce Net Emissions of Greenhouse Gases to the Atmosphere. Proceedings of the 3rd USDA Symposium on Greenhouse Gases and Carbon Sequestration in Agriculture and Forestry, Philadelphia, July 9-15 2006, 21-24.

[158]   Rondon, M.A., Molina, D., Hurtado, M., Ramirez, J., Lehmann, J., Major, J. and Amezquita, E. (2016) Enhancing the Productivity of Crops and Grasses While Reducing Greenhouse Gas Emissions through Bio-Char Amendments to Unfertile Tropical Soils. Proceedings of 18th World Congress of Soil Science, Philadelphia, July 9-15 2006, 9-15.

[159]   Yu, L.Q., Tang, J., Zhang, R.D., Wu, Q.H. and Gong, M.M. (2013) Effects of Biochar Application on Soil Methane Emission at Different Soil Moisture Levels. Biology and Fertility of Soils, 49, 119-128.

[160]   Dong, D., Yang, M., Wang, C., Wang, H.L., Li, Y., Luo, J.F. and Wu, W.X. (2013) Responses of Methane Emissions and Rice Yield to Applications of Biochar and Straw in a Paddy Field. Journal of Soils and Sediments, 13, 1450-1460.

[161]   Liu, X., Zhang, Y., Li, Z.F., Feng, R. and Zhang, Y.Z. (2014) Characterization of Corncob-Derived Biochar and Pyrolysis Kinetics in Comparison with Corn Stalk and Sawdust. Bioresource Technology, 170, 76-82.

[162]   Jia, J.X., Li, B., Chen, Z.Z., Xie, Z.B. and Xiong, Z.Q. (2012) Effects of Biochar Application on Vegetable Production and Emissions of N2O and CH4. Soil Science and Plant Nutrition, 58, 503-509.

[163]   Johnson-Beebout, S.E., Angeles, O.R., Alberto, M.C.R. and Buresh, R.J. (2009) Simultaneous Minimization of Nitrous Oxide and Methane Emission from Rice Paddy Soils Is Improbable Due to Redox Potential Changes with Depth in a Greenhouse Experiment without Plants. Geoderma, 149, 45-53.

[164]   Wang, J.Y., Pan, X.J., Liu, Y.L., Zhang, X.L. and Xiong, Z.Q. (2012) Effects of Biochar Amendment in Two Soils on Greenhouse Gas Emissions and Crop Production. Plant and Soil, 360, 287-298.

[165]   Yagi, K. and Minami, K. (1990) Effect of Organic Matter Application on Methane Emission from Some Japanese Paddy Fields. Soil Science and Plant Nutrition, 36, 599-610.

[166]   Kögel-Knabner, I., Amelung, W., Cao, Z., Fiedler, S., Frenzel, P., Jahn, R., Kalbitz, K., Kölbl, A. and Schloter, M. (2010) Biogeochemistry of Paddy Soils. Geoderma, 157, 1-14.

[167]   Cayuela, M.L., Jeffery, S. and van Zwieten, L. (2015) The Molar H:Corg Ratio of Biochar Is a Key Factor in Mitigating N2O Emissions from Soil. Agriculture Ecosystems & Environment, 202, 135-138.

[168]   Felber, R., Leifeld, J., Horak, J. and Neftel, A. (2014) Nitrous Oxide Emission Reduction with Greenwaste Biochar: Comparison of Laboratory and Field Experiments. European Journal of Soil Science, 65, 128-138.

[169]   Van Zwieten, L., Singh, B.P., Kimber, S.W.L., Murphy, D.V., Macdonald, L.M., Rust, J. and Morris, S. (2014) An Incubation Study Investigating the Mechanisms That Impact N2O Flux from Soil Following Biochar Application. Agriculture Ecosystems & Environment, 191, 53-62.

[170]   Clough, T.J., Bertram, J.E., Ray, J.L., Condron, L.M., O’Callaghan, M., Sherlock, R.R. and Wells, N.S. (2010) Unweathered Wood Biochar Impact on Nitrous Oxide Emissions from a Bovine-Urine-Amended Pasture Soil. Soil Science Society of America Journal, 74, 852-860.

[171]   Hale, S.E., Lehmann, J., Rutherford, D., Zimmerman, A.R., Bachmann, R.T., Shitumbanuma, V., O’Toole, A., Sundqvist, K.L., Arp, H.P.H. and Cornelissen, G. (2012) Quantifying the Total and Bioavailable Polycyclic Aromatic Hydrocarbons and Dioxins in Biochars. Environmental Science & Technology, 46, 2830-2838.

[172]   Taghizadeh-Toosi, A., Clough, T.J., Condron, L.M., Sherlock, R.R., Anderson, C.R. and Craigie, R.A. (2011) Biochar Incorporation into Pasture Soil Suppresses in Situ Nitrous Oxide Emissions from Ruminant Urine Patches. Journal of Environmental Quality, 40, 468-476.

[173]   Lorenz, K. and Lal, R. (2014) Biochar Application to Soil for Climate Change Mitigation by Soil Organic Carbon Sequestration. Journal of Plant Nutrition and Soil Science, 177, 651-670.

[174]   Luo, X.X., Wang, L.Y., Liu, G.C., Wang, X., Wang, Z.Y. and Zheng, H. (2016) Effects of Biochar on Carbon Mineralization of Coastal Wetland Soils in the Yellow River Delta, China. Ecological Engineering, 94, 329-336.

[175]   Sun, L.Y., Li, L., Chen, Z.Z., Wang, J.Y. and Xiong, Z.Q. (2014) Combined Effects of Nitrogen Deposition and Biochar Application on Emissions of N2O, CO2 and NH3 from Agricultural and Forest Soils. Soil Science and Plant Nutrition, 60, 254-265.

[176]   Rittl, T.F., Novotny, E.H., Balieiro, F.C., Hoffland, E., Alves, B.J.R. and Kuyper, T.W. (2015) Negative Priming of Native Soil Organic Carbon Mineralization by Oilseed Biochars of Contrasting Quality. European Journal of Soil Science, 66, 714-721.

[177]   Riaz, M., Roohi, M., Arif, M.S., Hussain, Q., Yasmeen, T., Shahzad, T., Shahzad, S.M., Muhammad, H.F., Arif, M. and Khalid, M. (2017) Corncob-Derived Biochar Decelerates Mineralization of Native and Added Organic Matter (AOM) in Organic Matter Depleted Alkaline Soil. Geoderma, 294, 19-28.

[178]   Jeffery, S., Meinders, M.B.J., Stoof, C.R., Bezemer, T.M., van de Voorde, T.F.J., Mommer, L. and van Groenigen, J.W. (2015) Biochar Application Does Not Improve the Soil Hydrological Function of a Sandy Soil. Geoderma, 251, 47-54.

[179]   Sagrilo, E., Jeffery, S., Hoffland, E. and Kuyper, T.W. (2015) Emission of CO2 from Biochar-Amended Soils and Implications for Soil Organic Carbon. Global Change Biology Bioenergy, 7, 1294-1304.

[180]   Zheng, H., Wang, X., Luo, X.X., Wang, Z.Y. and Xing, B.S. (2018) Biochar-Induced Negative Carbon Mineralization Priming Effects in a Coastal Wetland Soil: Roles of Soil Aggregation and Microbial Modulation. Science of the Total Environment, 610, 951-960.

[181]   Soinne, H., Hovi, J., Tammeorg, P. and Turtola, E. (2014) Effect of Biochar on Phosphorus Sorption and Clay Soil Aggregate Stability. Geoderma, 219, 162-167.

[182]   Archanjo, B.S., Baptista, D.L., Sena, L.A., Cancado, L.G., Falcao, N.P.S., Jorio, A. and Achete, C.A. (2015) Nanoscale Mapping of Carbon Oxidation in Pyrogenic Black Carbon from Ancient Amazonian Anthrosols. Environmental Science— Processes & Impacts, 17, 775-779.

[183]   Maestrini, B., Herrmann, A.M., Nannipieri, P., Schmidt, M.W.I. and Abiven, S. (2014) Ryegrass-Derived Pyrogenic Organic Matter Changes Organic Carbon and Nitrogen Mineralization in a Temperate Forest Soil. Soil Biology & Biochemistry, 69, 291-301.

[184]   Jeffery, S., Memelink, I., Hodgson, E., Jones, S., van de Voorde, T.F.J., Bezemer, T.M., Mommer, L. and van Groenigen, J.W. (2017) Initial Biochar Effects on Plant Productivity Derive from N Fertilization. Plant and Soil, 415, 435-448.

[185]   DeLuca, T.H. and Sala, A. (2006) Frequent Fire Alters Nitrogen Transformations in Ponderosa Pine Stands of the Inland Northwest. Ecology, 87, 2511-2522.[2511:FFANTI]2.0.CO;2

[186]   Elad, Y., David, D.R., Harel, Y.M., Borenshtein, M., Ben Kalifa, H., Silber, A. and Graber, E.R. (2010) Induction of Systemic Resistance in Plants by Biochar, a Soil-Applied Carbon Sequestering Agent. Phytopathology, 100, 913-921.

[187]   Jiang, J., Xu, R.K., Jiang, T.Y. and Li, Z. (2012) Immobilization of Cu(II), Pb(II) and Cd(II) by the Addition of Rice Straw Derived Biochar to a Simulated Polluted Ultisol. Journal of Hazardous Materials, 229, 145-150.

[188]   Ezawa, T., Smith, S.E. and Smith, F.A. (2002) P Metabolism and Transport in AM Fungi. Plant and Soil, 244, 221-230.

[189]   Fang, G.D., Liu, C., Gao, J., Dionysiou, D.D. and Zhou, D.M. (2015) Manipulation of Persistent Free Radicals in Biochar to Activate Persulfate for Contaminant Degradation. Environmental Science & Technology, 49, 5645-5653.

[190]   Kappler, A., Wuestner, M.L., Ruecker, A., Harter, J., Halama, M. and Behrens, S. (2014) Biochar as an Electron Shuttle between Bacteria and Fe(III) Minerals. Environmental Science & Technology Letters, 1, 339-344.

[191]   Lone, A.H., Najar, G.R., Ganie, M.A., Sofi, J.A. and Ali, T. (2015) Biochar for Sustainable Soil Health: A Review of Prospects and Concerns. Pedosphere, 25, 639-653.