Effect of Long-term Nitrogen, Phosphorus and Potassium Fertilization of Irrigated Corn and Grain Sorghum

References to published articles:

Schlegel, A.J. and J.L. Havlin. 2017. Corn Yield and Grain Nutrient Uptake from 50 Years of Nitrogen and Phosphorus Fertilization. Agronomy Journal. 109:1. p. 335-342.
Blanco-Canqui, H. and A.J. Schlegel. 2013. Implications of Inorganic Fertilization of Irrigated Corn on Soil Properties: Lessons Learned after 50 Years. J. Environ. Qual. 42:861–871.
Schlegel, A. and K. Martin. 2012. Effect of Long-term N and P Fertilization on Soil Chemical Properties. Great Plains Soil Fertility Conf. Proceedings. p. 55-63.
Fertilizer Contributions to Crop Yield, by W.M. Stewart
Fertilizer and Our Environment, by W.M. Stewart
Dhuyvetter, K.C., A.J. Schlegel and T.L. Kastens. 2000. Effect of Phosphorus on Economic Nitrogen Rate for Irrigated Corn - Update. Better Crops V84-3. p9-11.
Fertilization and Low Crop Prices...What to Do? by W.M. Stewart
Schlegel, A.J., K.C. Dhuyvetter and J.L. Havlin. 1996. Economic and Environmental Impacts of Long-Term Nitrogen and Phosphorus Fertilization. JProdAg, V9-1.
Schlegel, A.J. and J.L. Havlin. 1995. Corn Response to Long-Term Nitrogen and Phosphorus Fertilization. JProdAg, V8-2
Dhuyvetter, K. and A. Schlegel. 1994. Phosphorus Reduces Grain Moisture and Improves Corn Profitability. Better Crops V78-2. p 10-11.
Schlegel, A. 1992. Phosphorus Fertilization Relieves Stresses in Irrigated Corn Production. Better Crops V76-4. p 6-7.
Schlegel, A. and K. Dhuyvetter. 1992. Long Term Phosphorus Research on Corn and Grain Sorghum. North Central Extension-Industry Soil Fertility Conference, p118-124.
Schlegel, A. and K. Dhuyvetter. 1992. Phosphoruous Boosts Long-term Corn and Sorghum Yields, Reduces Soil Nitrate Carryover. Better Crops V76-1. p 16-19.