Keywords
irrigated corn, nitrogen and phosphorus fertilization, southwest Kansas
Abstract
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, where 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.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Schlegel, A. and Bond, H. D.
(2015)
"Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Corn,"
Kansas Agricultural Experiment Station Research Reports:
Vol. 1:
Iss.
3.
https://doi.org/10.4148/2378-5977.1027
