[1] Malhi, S.S., Vera, C.L. and Brandt, S.A. (2014) Feasibility of Rock Phosphate and Other Amendments in Preventing P Deficiency in Barley on a P-Deficient Soil in Northeastern Saskatchewan. Agricultural Sciences, 14, 1491-1500. http://dx.doi.org/10.4236/as.2014.514160
[2] Yaseen, M. and Malhi, S.S. (2009) Differential Growth Response of 15 Wheat Genotypes for Grain Yield and P Uptake on a Low P Soil without and with Applied P Fertilizer. Journal of Plant Nutrition, 32, 1015-1043.
http://dx.doi.org/10.1080/01904160902872818
[3] Yaseen, M. and Malhi, S.S. (2009) Variation in Yield, Phosphorus Uptake and Physiological Efficiency of Wheat Genotypes at Adequate and Stress Phosphorus Levels in Soil. Communications in Soil Science and Plant Analysis, 40, 3104-3120. http://dx.doi.org/10.1080/00103620903261643
[4] Yaseen, M. and Malhi, S.S. (2010) Selection Criteria for P Efficient Wheat Genotypes and Identification of Plant Characters Responsible for High Grain Yield under Low Soil P Conditions. Communications in Soil Science and Plant Analysis, 41, 679-695. http://dx.doi.org/10.1080/00103620903563923
[5] Yaseen, M. and Malhi, S.S. (2011) Exploitation of Genetic Variability among Wheat Genotypes for Tolerance to Phosphorus Deficiency Stress. Journal of Plant Nutrition, 34, 665-699.
http://dx.doi.org/10.1080/01904167.2011.540623
[6] Huang, C.L. and Schulte, E.E. (1985) Digestion of Plant Tissue for Analysis by ICP Emission Spectroscopy. Communications in Soil Science and Plant Analysis, 16, 943-958.
http://dx.doi.org/10.1080/00103628509367657
[7] Association of Official Analytical Chemists (AOAC) (1995) Protein (Crude) in Animal Feed. Combustion Method (990.03). Official Methods of Analysis. 16th Edition, AOAC, Washington DC.
[8] Williams, P., Sobering, D. and Antoniszyn, J. (1998) Protein Testing Methods. In: Fowler, D.B., Geddes, W.E., Johnston, A.M. and Preston, K.R., Eds., Wheat Protein Production and Marketing, University Extension Press, University of Saskatchewan, Saskatoon, 37-47.
[9] Snyder, C.S. and Bruulsema, T.W. (2007) Nutrient Use Efficiency and Effectiveness in North America. Indices of Agronomic and Environmental Benefits. IPNI publication Ref. # 07076, International Plant Nutrient Institute, Norcross.
[10] SAS Institute, Inc. (2004) Online Documentation for SAS, Version 8.
http://support.sas.com/documentation/onlinedoc/index.html
[11] Yaseen, M. and Malhi, S.S. (2009) Differential Growth Response of Wheat Genotypes to Ammonium Phosphate and Rock Phosphate Phosphorous Sources. Journal of Plant Nutrition, 32, 410-432.
http://dx.doi.org/10.1080/01904160802660735