US EPA, “Pesticides and Pesticide Containers, Regulation for Acceptance and Recommended Procedures for Disposal and Treatment,” US Environmental Protection Agency, Municipal Environmental Research Laboratory, Cincinnati, 2011. http://www.epa.ca
 C. Osteen and M. Livingstion, “Pest Management Practices,” Agricultural Resources and Environmental Indicators, United States Department of Agriculture, Washington DC, 2006. http://www.ers.usda.gov
 C. Wilson and C. Tisdell, “Why Farmers Continue to Use Pesticides Despite Environmental Health and Sustainability Costs,” Ecological Economics, Vol. 39, No. 3, 2001, pp. 449-462. doi:10.1016/S0921-8009(01)00238-5
 D. W. Connell, “Bioaccumulation Behaviour of Persistent Organic Chemicals with Aquaticorganisms,” Review of Environmental Contamination and Toxicology, Vol. 101, 1988, pp. 117-154. doi:10.1007/978-1-4612-3810-2_3
 C. E. Lundholm, “DDE-Induced Eggshell Thinning in Birds: Effects of p,p’-DDE on the Calcium and Prostaglandin Metabolism of the Eggshell Gland,” Comparative Biochemistry and Physiology Part C: Pharmacology Toxicology Endocrinology, Vol. 118, No. 2, 1997, pp. 113-128. doi:10.1016/S0742-8413(97)00105-9
 W. L. Winterlin, S. R. Schoen and C. R. Mourer, “Disposal of Pesticide Wastes in Lined Evaporation Beds,” Treatment and Disposal of Pesticide Wastes, Vol. 259, 1984, pp. 97-116. doi:10.1021/bk-1984-0259.ch006
 C. J. Somlich, M. T. Kearney and S. Elsasser, “Enhanced Soil Degradation of Alachlor by Treatment with Ultraviolet Light and Ozone,” Journal of Agricultural Food Chemistry, Vol. 36, 1988, pp. 1322-1326. doi:10.1021/jf00084a049
 C. V. Hall, J. Baker, P. Dahm, L. Freiburger and G. Gorder, “Safe Disposal Methods for Agricultural Pesticide Wastes,” US Environmental Protection Agency, Municipal Environmental Research Laboratory, Cincinnati, 1981. http://www.epa.gov/
 FRTR, “Composting (ex Situ Biological Treatment),” Federal Remediation Technologies Roundtable, Center for Environmental Research Information, Cincinnati, 2008. http://www.frtr.gov/matrix2/section4/4-12.html
 A. S. Felsot, K. D. Racke and D. J. Hamilton, “Disposal and Degradation of Pesticide Waste,” Reviews of Environmental Contamination and Toxicology, Vol. 177, 2003, pp. 123-200. doi:10.1007/0-387-21725-8_3
 B. J. Bhadhade, S. S. Sarnaik and P. P. Kanekar, “Bioremediation of an Industrial Effluent Containing Monocrotophos,” Current Microbiology, Vol. 45, No. 5, 2002, pp. 346-349. doi:10.1007/s00284-002-3681-1
 K. Ohshiro, T. Kakuta, T. Sakai, H. Hirota, T. Hoshino and T. Uchiyama, “Biodegradtion of Organophosphorus Insecticides by Bacteria Isolated from Turf Green Soil,” Journal of Fermentation and Bioengineering, Vol. 82, No. 3, 1996, pp. 299-305. doi:10.1016/0922-338X(96)88823-4
 P. C. Kearney, R. G. Nash and C. S. Helling, “Pesticide Degradation Properties,” Proceedings, National Workshop on Pesticide Waste Disposal, US Environmental Protection Agency, Water Engineering Research Laboratory, Cincinnati, 1985, pp. 35-42.
 M. Tang and M. You, “Isolation, Identification and Characterization of a Novel Triazophos-Degrading Bacillus sp. (TAP-1),” Microbiological Research, Vol. 167, No. 5, pp. 299-305. doi:10.1016/j.micres.2011.10.004
 R. S. Schoen and W. L. Winterlin, “The Effects of Various Soil Factors and Amendments on the Degradation of Pesticide Mixtures,” Journal of Environmental Science and Health Part B, Vol. 22, No. 3, 1987, pp. 347-377. doi:10.1080/03601238709372561
 L. Somasundaram, J. R. Coats, D. K. Racke and H. M. Stahr, “Application of the Microtox System to Assess the Toxicity of Pesticides and Their Hydrolysis Metabolites,” Bulletin of Environmental Contamination Toxicology, Vol. 44, No. 2, 1990, pp. 254-259. doi:10.1007/BF01700144
 A. S. Felsot, J. K. Mitchell and E. K. Dzantor, “Remediation of Herbicide Contaminated Soil by Combinations of Landfarming and Biostimulation,” SSSA Special Publication, Vol. 43, 1995, pp. 237-257.
 W. Winterlin, J. N. Seiber, A. Craigmill, T. Baier, J. Woodrow and G. Walker, “Degradation of Pesticide Waste Taken from a Highly Contaminated Soil Evaporation Pit in California,” Archives of Environmental Contamination and Toxicology, Vol. 18, 1989, pp. 734-747. doi:10.1007/BF01225011
 J. Y. Gan and W. C. Koskinen, “Pesticide Fate and Behavior in Soil at Elevated Concentrations,” In: P. C. Kearney and T. R. Roberts, Pesticide Remediation in Soils and Water, Wiley, Chichester, 1998, pp. 59-84.
 E. K. Dzantor and A. S. Felsot, “Microbial Responses to Large Concentrations of Herbicides in Soil,” Environmental Toxicology and Chemistry, Vol. 10, No. 5, 1991, pp. 649-655. doi:10.1002/etc.5620100511
 J. Gan, W. C. Koskinen, R. L. Becker and D. D. Buhler, “Effect of Concentration on Persistence of Alachlor in Soil,” Journal of Environmental Quality, Vol. 24, No. 6, 1995, pp. 1162-1169. doi:10.2134/jeq1995.00472425002400060016x
 J. M. Davidson, P. S. Rao, L. T. Ou, W. B. Wheeler and D. F. Rothwell, “Adsorption, Movement and Biological Degradation of Large Concentrations of Selected Pesticides in Soil,” US Environmental Protection Agency, Municipal Environmental Research Laboratory, Cincinnati, 1980.
 J. Gan, R. L. Becker, W. C. Koskinen and D. D. Buhler, “Degradation of Atrazine in Two Soils as a Function of Concentration,” Journal of Environmental Quality, Vol. 25, No. 5, 1996, pp. 1064-1072. doi:10.2134/jeq1996.00472425002500050019x
 D. M. Hodapp and W. Winterlin, “Pesticide Degradation in Model Soil Evaporation Beds,” Bulletin of Environmental Contamination and Toxicology, Vol. 43, No. 1, 1989, pp. 36-44. doi:10.1007/BF01702235
 W. G. Johnson and T. L. Lavy, “In-Situ Dissipation of Benymyl, Carbofuran, Thiobencarb and Triclopyr at Three Soil Depths,” Journal of Environmental Quality, Vol. 23, No. 3, 1994, pp. 556-562. doi:10.2134/jeq1994.00472425002300030022x
 A. Yasuhara, H. Shiraishi, M. Nishikawa, T. Yamamoto, T. Uehiro, O. Nakasugi, T. Okumura, K. Kenmotsu, H. Fukui, M. Nagase, Y. Ono, Y. Kawagoshi, K. Baba and Y. Noma, “Determination of Organic Components in Leachates from Hazardous Waste Disposal Sites in Japan by Gas Chromatography-Mass Spectrometry,” Journal of Chromatograohy A, Vol. 774, No. 1, 1997, pp. 321-332.
 G. M. Williams, I. Harrison, C. A. Carlick and O. Crowley, “Changes in Anantipmeric Fraction as Evidence of Natural Attenuation of Mecoprop in a Limestone Aquifer,” Journal of Contaminant Hydrology, Vol. 64, No. 3-4, 2003, pp. 253-267. doi:10.1016/S0169-7722(02)00206-1
 T. H. Christensen, P. Kjeldsen, P. L. Bjerg, D. L. Jensen, J. B. Christensen, A. Baun, H. J. Albrechtsen and G. Heron, “Biogeochemistry of Landfill Leachate Plumes,” Applied Geochemistry, Vol. 16, No. 7, 2001, pp. 659-718. doi:10.1016/S0883-2927(00)00082-2
 D. A. Oberacker, “Incineration Options for Disposal of Waste Pesticides,” In: J. S. Bridges and C. R. Dempsey, Eds., Pesticide Waste Disposal Technology, US Environmental Protection Agency, Noyes Data Corporation, 1988.
 W. P. Linak, J. A. Mulholland, J. A. McSorley, R. E. Hall, R. K. Srivastava, J. V. Ryan, M. G. Nishioka, J. Lewtas and D. M. DeMarini, “Application of Staged Combustion And Reburning to the Co-Firing of Nitrogen-Containing Wastes,” Hazardous Waste and Hazardous Materials, Vol. 8, No. 1, 1991, pp. 1-15. doi:10.1089/hwm.1991.8.1
 B. Adebona, A. Shafagati, E. J. Martin and R. C. Chawla, “Laboratory Evaluation of Products of Incomplete Combustion Formed from Burning of Agricultural Product Bags,” Waste Management, ACS Symposium Series, Vol. 510, 1992, pp. 63-77.
 D. A. Oberacker, P. C. Lin, G. M. Shaul, D. T. Ferguson, V. S. Engleman, T. W. Jackson, J. S. Chapman, J. D. Evans, R. J. Martrano and L. L. Every, “Characterization of Emissions Formed from Open Burning of Pesticide Bags,” Pesticide Waste Management, ACS Symposium Series, Vol. 510, 1992, pp. 78-94.
 A. Mokrini, D. Oussi and S. Esplugas, “Oxidaiton of Aromatic Compounds with UV Radiation/Ozone/Hydrogen Peroxide,” Water Science and Technology, Vol. 35, No. 4, 1981, pp. 95-102. doi:10.1016/S0273-1223(97)00014-0
 W. S. Kuo, “Photocatalytic Oxidation of Pesticide Rinsate,” Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes, Vol. 37, No. 1, 2002, pp. 65-74. doi:10.1081/PFC-120002898
 R. D. H. Paulson, H. LeBaron, G. Rolofson and C. Ganz, “Chemical Treatment Options for Pesticide Wastes Disposal,” In: J. S. Bridges and C. R. Dempsey, Eds., Pesticide Waste Disposal Technology, Park Ridge, New Jersey, 1988, pp. 73-86.
 H. Fallmann, T. Krutzler, R. Bauer, S. Malato and J. Blanco, “Applicability of the Photo-Fenton Method for Treating Water Containing Pesticides,” Catalysis Today, Vol. 54, No. 2-3, 1999, pp. 309-319. doi:10.1016/S0920-5861(99)00192-3
 Y. Sun and J. J. Pingnatello, “Chemical Treatment of Pesticide Wastes, Evaluation of Fe(III) Chelates for Catalytic Hydrogen Peroxide Oxidation of 2,4-D at Circumneutral pH,” Journal of Agricultural Food Chemistry, Vol. 40, 1992, pp. 322-327. doi:10.1021/jf00014a031
 S. Malato, J. Blanco, A. Vidal, P. Fernandez, J. Caceres, P. Trincado, J. C. Oliveira and M. Vincent, “New Large Solar Photocatalytic Plant: Set-Up and Preliminary Results,” Chemosphere, Vol. 47, No. 3, 2002, pp. 235-240. doi:10.1016/S0045-6535(01)00220-X
 R. A. Larson, M. B. Schlauch and K. A. Marley, “Ferric Ion Promoted Photodecomposition or Trizines,” Journal of Agricultural Food Chemistry, Vol. 39, No. 11, 1991, pp. 2057-2062. doi:10.1021/jf00011a035
 P. L. Huston and J. J. Pignatello, “Degradation of Selected Pesticide Active Ingredients and Commercial Formulations in Water by the Photo-Assisted Fenton Reaction,” Water Research, Vol. 33, No. 5, 1999, pp. 12381246. doi:10.1016/S0043-1354(98)00330-3
 J. J. Pignatello and Y. Sun, “Complete Oxidation of Metolachlor and Methyl Parathion in Water by the Photoassisted Fenton Reaction,” Water Research, Vol. 29, 1995, pp. 1837-1844. doi:10.1016/0043-1354(94)00352-8
 R. Doong and W. Chang, “Photoassisted Iron Compound Catalytic Degradation of Organophosphorous Pesticide with Hydrogen Peroxide,” Chemosphere, Vol. 37, No. 13, 1998, pp. 2563-2572. doi:10.1016/S0045-6535(98)00038-1
 G. Lee, R. A. Kenley and J. S. Winterle, “Reaction of Sodium Perborate with Organophosphorus Esters,” Treatment and Disposal of Pesticide Wastes, ACS Symposium Series, Vol. 259, 1984, pp. 211-219.
 C. Qian, P. G. Sanders and J. N. Seiber, “Accelerated Degradation of Organophosphorus Pesticides with Sodium Perborate,” Bulletin of Environmental Contamination and Toxicology, Vol. 35, No. 1, 1985, pp. 682-688. doi:10.1007/BF01636573
 J. M. Smolen and A. T. Stone, “Divalent Metal IonCatalyzed Hydrolysis of Phosphorothionate Ester Pesticides and Their Corresponding Oxonated,” Environmental Science and Technology, Vol. 31, No. 6, 1997, pp. 1664-1673. doi:10.1021/es960499q
 A. M. Badawi and S. M. Ahmed, “Hydrolysis of Pesticides in Wastewater Catalyzed by Cu(II) Complexes of Silyl Based Cationic Micelles,” Journal of Dispersion Science and Technology, Vol. 31, No. 4, 2010, pp. 577-582. doi:10.1080/01932690903192804
 D. J. Brunelle and D. A. Singleton, “Chemical Reaction of Polychlorinated Biphenyls on Soils with Poly(Ethylene glycol)/KOH,” Chemosphere, Vol. 14, No. 2, 1985, pp. 173-181. doi:10.1016/0045-6535(85)90096-7
 T. O. Tiernan, D. J. Wagel, J. H. Garrett, G. F. VanNess, J.G. Solch and L. A. Harden, “Laboratory and Field Tests to Demonstrate the Efficacy of KPEG Reagent for Detoxification of Hazardous Wastes Containing Polychlorinated Dibenzo-p-Dioxins (PCDD) and Dibenzofurans (PCDF) and Soils Contaminated with Such Chemical Wastes,” Chemosphere, Vol. 18, 1989, pp. 835-841. doi:10.1016/0045-6535(89)90205-1
 M. L. Taylor, J. A. Wentz, M. A. Dosani, W. Gallagher and J. S. Greber, “Treating Chlorinated Wastes with KPEG Process,” US Environmental Protection Agency, Engineering Laboratory, Cincinnati, 1990.
 J. Inacio, C. Taviot-Gueho, C. Forano and J. P. Besse, “Adsorption of MCPA Pesticide by MgAl-Layered Double Hydroxides,” Applied Clay Science, Vol. 18, No. 5-6, 2001, pp. 255-264. doi:10.1016/S0169-1317(01)00029-1
 M. Ahmaruzzaman and V. K. Gupta, “Rice Husk and Its Ash as Low-Cost Adsorbents in Water and Wastewater Treatment,” Industrial and Engineering Chemistry Research, Vol. 50, No. 24, 2011, pp. 13589-13613.
 R. Niwas, U. Gupta, A. A. Khan and K. G. Varshney, “The Absorption of Phosphamidon on the Surface of Styrene Supported Zirconium (IV) Tungstophosphate: A Thermodynamic Study,” Colloids and Surfaces, A: Physicochemical and Engineering Aspects, Vol. 164, 2000, pp. 115-119. doi:10.1016/S0927-7757(99)00247-2
 R. Boussahel, A. Montiel and M. Baudu, “Effects of Organic and Inorganic Matter on Pesticide Rejection by Nanofiltration,” Desalination, Vol. 145, No. 1, 2002, pp. 109-114. doi:10.1016/S0011-9164(02)00394-6
 E. Bojemueller, A. Nennemann and G. Lagaly, “Enhanced Pesticide Adsorption by Thermally Modified Bentonites,” Applied Clay Science, Vol. 18, No. 5-6, 2001, pp. 277-284. doi:10.1016/S0169-1317(01)00027-8
 F. Li, Y. Wang, Q. Yang, D. G. Evans, C. Forano and X. Duan, “Study on Adsorption of Glyphosate (N-Phosphonomethyl Glycine) Pesticide on MgAl-Layered Double Hydroxides in Aqueous Solution,” Journal of Hazardous Materials, Vol. 125, No. 1-3, 2005, pp. 89-95. doi:10.1016/j.jhazmat.2005.04.037
 S. Chowdhury, R. Mishra, P. Saha and P. Kushwaha, “Adsorption Thermodynamics, Kinetics and Isosteric Heat of Adsorption of Malachite Green onto Chemically Modified Rice Husk,” Desalination, Vol. 265, No. 1, 2011, pp. 159-168. doi:10.1016/j.desal.2010.07.047
 M. Akhtar, S. M. Hasany, M. I. Bhanger and S. Iqbal, “Low Cost Sorbents for the Removal of Methyl Parathion Pesticide from Aqueous Solutions,” Chemosphere, Vol. 66, No. 10, 2007, pp. 1829-1838. doi:10.1016/j.chemosphere.2006.09.006
 G. Z. Memon, M. I. Bhanger, M. Akhtar, F. N. Talpur and J. R. Memon, “Adsorption of Methyl Parathion Pesticide from Water Using Watermelon Peels as a Low Cost Adsorbent,” Chemical Engineering Journal, Vol. 138, No. 1-3, 2008, pp. 616-621. doi:10.1016/j.cej.2007.09.027
 M. Al hattab and A. E. Ghaly, “Sequential Remediation Processes for Low Level Pesticide Wastewater,” Journal of Environmental Protection, Vol. 3, No. 2, 2012, pp. 150-163. doi:10.4236/jep.2012.32019
 P. R. Atkins, “The Pesticide Manufacturing Industry-Current Waste Treatment and Disposal Practices,” Water Pollution Control Research Series, US Environmental Protection Agency, Washington DC, 1972.
 E. A. Kobylinski, W. H. Dennis and A. B. Rosencrance, “Treatment of Pesticide-Laden Waste Water by Recirculation through Activated Carbon,” Treatment of Pesticide Wastes, ACS Symposium Series, Vol. 259, 1984, pp. 125-154.
 W. H. Dennis and E. A. Kobylinski, “Pesticide-Laden Wastewater Treatment for Small Waste Generators,” Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes, Vol. 18, No. 3, 1983, pp. 317-331. doi:10.1080/03601238309372372
 S. E. Dwinell, “Treatment of Pesticide Wastes: Regulatory and Operational Requirements for Successful Treatment Systems,” Pesticide Waste Management, ACS Symposium Series, Vol. 510, 1992, pp. 113-126. doi:10.1021/bk-1992-0510.ch009
 J. C. Morris and Jr. W. J. Weber, “Adsorption of Biochemically Resistant Materials form Solution,” Advanced Waste Treatment Research Program, US Public Health Service, Cincinnati, 1964, AWTR-9 Report 999-WP-11
 J. C. Morris and Jr. J. Weber, “Adsorption of Biochemically Resistant Materials Form Solution,” Part II, US Public Health Service, Advanced Waste Treatment Research Program, Cincinnati, 1966, WTR-16, Report 999P-33,
 B. Sarkar, N. Venkateswralu, R. N. Rao and C. Bhattacharjee, “Treatment of Pesticide Contaminated Surface Water for Production of Potable Water by a CoagulationAdsorption-Nanofiltration Approach,” Desalination, Vol. 212, No. 1-3, 2007, pp. 129-140. doi:10.1016/j.desal.2006.09.021
 V. K. Gupta, I. Ali Suhas and V. K. Saini, “Adsorption of 2,4-D and Carbofuran Pesticides Using Fertilizer and Steel Industry Wastes,” Journal of Colloid and Interface Science, Vol. 299, No. 2, 2006, pp. 556-563. doi:10.1016/j.jcis.2006.02.017
 T. M. Word and F. W. Getzen, “Influence of pH on the Adsorption of Aromatic Acids on Activated Carbon,” Environmental Science and Technology, Vol. 4, No. 1, 1970, pp. 64-67. doi:10.1021/es60036a006
 K. D. Racke and C. R. Frink, “Fate of Organic Contaminants during Sewage Sludge Composting,” Bulletin of Environmental Contamination and Toxicology, Vol. 42, No. 4, 1989, pp. 526-533. doi:10.1007/BF01700232
 J. A. Petruska, D. E. Mullins, R. W. Young and E. R. Collins, “A Benchtop System for Evaluation of Pesticide Disposal by Composting,” Nuclear and Chemical Waste Management, Vol. 5, No. 3, 1985, pp. 177-182. doi:10.1016/0191-815X(85)90076-2
 T. F. Castro and T. Yoshida, “Effect of Organic Matter on the Biodegradation of Some Organochlorine Insecticides in Submerged Soils,” Soil Science and Plant Nutrition, Vol. 20, No. 4, 1974, pp. 363-370. doi:10.1080/00380768.1974.10432607
 J. F. Brown, R. E. Wagner, H. Feng, D. L. Bedard, M. J. Brennan, J. C. Carnahan and R. J. May, “Environmental Dechlorination of PCBs,” Environmental Toxicology and Chemistry, Vol. 6, No. 8, 1987, pp. 579-593. doi:10.1002/etc.5620060802
 P. Adriaens, Q. Fu and D. Grbic-Galic, “Bioavailability and Transformation of Highly Chlorinated Dibenzo-pDioxins and Dibenzofurans in Anaerobic Soils and Sediments,” Environmental Science and Technology, Vol. 29, No. 9, 1995, pp. 2252-2260. doi:10.1021/es00009a015
 M. J. Zwiernik, J. F. Quensen and S. A. Boyd, “FeSO4 Amendments Stimulate Extensive Anaerobic PCB Dechlorination,” Environmental Science and Technology, Vol. 32, No. 21, 1998, pp. 3360-3365. doi:10.1021/es9801689
 S. D. Cunningham, T. A. Anderson, P. A. Schwab and F. C. Hsu, “Phytoremediation of Soils Contaminated with Organic Pollutants,” Advances in Agronomy, Vol. 56, 1996, pp. 55-114. doi:10.1016/S0065-2113(08)60179-0
 J. R. Coats and T. A. Anderson, “The Use of Vegetation to Enhance Bioremediation of Surface Soils Contaminated with Pesticide Wastes,” US Environmental Protection Agency, Office of Research and Development. Washington DC, 1997. http://www.epa.gov/
 R. Olette, M. Couderchet, S. Biagianti and P. Eullaffroy, “Toxicity and Removal of Pesticides by Selected Aquatic Plants,” Chemosphere, Vol. 70, No. 8, 2008, pp. 1414-1421. doi:10.1016/j.chemosphere.2007.09.016
 G. A. Buyanovsky, R. J. Kremer, A .M. Gajda and H. V. Kazemi, “Effect of corn Plants And Rhizosphere Populations on Pesticide Degradation,” Bulletin of Environmental Contamination and Toxicology, Vol. 55, 1995, pp. 689-696. doi:10.1007/BF00203754
 M. Gordon, N. Choe, J. Duffy, G. Ekuan, P. Heilman, I. Muiznieks, M. Ruszaj, B. B. Shurtleff, S. Strand, J. Wilmoth and L. A. Newman, “Phytoremediaiton of Trichloroethylene with hybrid poplars,” Environmental Health Perspectives Supplements, Vol. 106, No. 4, 1998, pp. 1001-1004. doi:10.1289/ehp.98106s41001
 K. Stearman, D. George, K. Carlson and S. Lansford, “Pesticide Removal from Container Nursery Runoff in Constructed Wetland Cells,” Journal of Environmental Quality, Vol. 32, No. 4, 2003, pp. 1548-1556. doi:10.2134/jeq2003.1548
 L. Wang, X. Jiang, D. Yan, J. Wu, Y. Bian and F. Wang, “Behavior and Fate of Chlorpyrifos Introduced into SoilCrop Systems by Irrigation,” Chemosphere, Vol. 66, No. 3, 2007, pp. 391-396. doi:10.1016/j.chemosphere.2006.06.038
 F. K. Pfaender and M. Alexander, “Extensive Microbial Degradation of DDT in Vitro and DDT Metabolism by Natural Communities,” Journal of Agricultural Food Chemistry, Vol. 20, No. 4, 1972, pp. 842-846. doi:10.1021/jf60182a045
 M. J. Acea, C. R. Moore and M. Alexander, “Survival and Growth of Bacteria Introduced into Soil,” Soil Biology and Biochemistry, Vol. 20, No. 4, 1988, pp. 509-515. doi:10.1016/0038-0717(88)90066-1