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Economic Optimum Fertilizer Potassium Rate for Irrigated Soybeans.

Authors :
Richard, J. A.
Bryant, K. J.
Mark, T. B.
Slaton, N. A.
Source :
B.R. Wells Rice Research Studies - Arkansas Agricultural Experiment Station, University of Arkansas System; Mar2019, Issue 657, p37-39, 3p
Publication Year :
2019

Abstract

A Linear Response Stochastic Plateau (LRSP) yield response model as documented in the literature is used to estimate soybean (Glycine max L.) yield in Arkansas for a given soil-applied fertilizer-K rate and a given soil-test K. This yield response to K fertilization is coupled with soybean price and fertilizer-K price to estimate an economic optimum fertilizer-K recommendation. Data used to fit the model are from 99 research trials conducted throughout Arkansas to examine irrigated soybean response to K fertilization rate. These tests were conducted from 2004 to 2016. Results show the economic soil-applied fertilizer-K recommendations decrease as soil-test K increases. Also, as the market situation becomes more favorable as marked by a higher soybean price and a lower fertilizer-K price, the economic recommendation is to apply more fertilizer K at all soil-test K levels. Soil-test K values can now be used to make economically informed decisions, where previously only agronomic insight was available to soybean producers. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19313764
Issue :
657
Database :
Complementary Index
Journal :
B.R. Wells Rice Research Studies - Arkansas Agricultural Experiment Station, University of Arkansas System
Publication Type :
Report
Accession number :
135885628