Nitrogen and Phosphorus Fertilization of Irrigated Corn

Authors

A. Schlegel, Kansas State UniversityFollow
H. D. Bond, Kansas State UniversityFollow

Keywords

soil fertility, irrigation, corn, nitrogen fertilization, phosphorus fertilization

Abstract

(Abstract only. Link to: http://newprairiepress.org/kaesrr/vol1/iss3/7/)
Article is nearly identical to Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Corn, previously published in Kansas Fertilizer Research 2015, included in this PDF.

Long-term research shows that phosphorus (P) and nitrogen (N) fertilizer must be applied to optimize production of irrigated corn in western Kansas. In 2014, N applied alone increased yields 58 bu/a, whereas P applied alone increased yields only 12 bu/a. Nitrogen and P applied together increased yields up to 152 bu/a. This is slightly above the 10-year average, when N and P fertilization increased corn yields up to 146 bu/a. Application of 120 lb/a N (with P) produced about 91% of maximum yield in 2014, which was similar to the 10-year average. Application of 80 instead of 40 lb P2O5/a increased average yields 9 bu/a.

Recommended Citation

Schlegel, A. and Bond, H. D. (2015) "Nitrogen and Phosphorus Fertilization of Irrigated Corn," Kansas Agricultural Experiment Station Research Reports: Vol. 1: Iss. 5. https://doi.org/10.4148/2378-5977.1077