Abstract
Abstract only. Link to: http://newprairiepress.org/kaesrr/vol1/iss3/6/) Article is nearly identical to Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum, 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 grain sorghum in western Kansas. In 2014, N applied alone increased yields 49 bu/a, whereas N and P applied together increased yields up to 81 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 73 bu/a. Application of 40 lb/a N (with P) was sufficient to produce more than 80% of maximum yield in 2014, which almost equals the 10-year average. Application of potassium (K) has had no effect on sorghum yield throughout the study period.
Highlights
This study was initiated in 1961 to determine responses of continuous grain sorghum grown under flood irrigation to N, P, and K fertilization
Application of 40 lb/a N was sufficient to produce more than 80% of maximum yield in 2014, which almost equals the 10-year average
Application of 40 lb/a N (with P) was sufficient to produce more than 80% of maximum yield in 2014, which almost equals the 10-year average
Summary
Follow this and additional works at: http://newprairiepress.org/kaesrr Part of the Agricultural Science Commons, Agriculture Commons, and the Agronomy and Crop. D. (2015) "Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum," Kansas Agricultural Experiment Station Research Reports: Vol 1: Iss. 3
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