Applied Fertility Management for Irrigated Soybean Production

Bermudez M. and Mallarino A.P. 2007. Impacts of variable-rate phosphorus fertilization based on dense grid soil sampling on soil-test phosphorus and grain yield of corn and soybean. Agron. J. 99:822-832.
Gordon, W.B. 2005. Maximizing irrigated soybean yields in the Great Plains. Better Crops. 92(8):6-7.
Lamond, R.E. and T.L. Wesley. 2001. In-season fertilization for high yield soybean production. Better Crops. 85(2):6-11.
Scharf P.C., Shannon K., Hubbard V. and Mueller L. 2011. Yield response to P & K fertilizers over landscapes. Rep. Agronomy Miscellaneous Publ. #11-01. Agronomy Department, College of Agriculture, Food and Natural Resources, University of Missouri, Columbia, MO.
[USDA-NASS] USDA-National Agricultural Statistics Service. 2011. Kansas state and county data. Subject Series. USDA-NASS, Washington, DC.
Wittry D. and Mallarino A. 2004. Comparison of uniform- and variable-rate phosphorus fertilization for corn-soybean rotations. Agron. J. 96:26-33.