Abstract
Previous Iowa State University (ISU) research has assessed the corn and soybean grain yield response to potassium (K) fertilizer placement methods using granulated potash fertilizer (0- 0-62). However, no study had evaluated K sidedressing, although postemergence sidedressing of nitrogen for corn is a common practice. Mainly because of low grain prices, farmers and crop consultants have been asking if K sidedress could be of value to increase corn and soybean yield and perhaps reduce the preplant K application rate. Therefore, a study was initiated at this farm in 2017 to evaluate the value of sidedressed liquid K fertilizer for corn and a following soybean crop. Last year a report summarized the results of corn trials conducted in 2017 and 2018 at this farm. This report summarizes results for soybean trials conducted in 2018 and 2019.
How to Cite:
Mallarino, A. P., Thompson, L. B., Thompson, G. & Piekema, N., (2020) “Soybean Yield and Leaf Potassium Responses to Sidedressed Liquid Potassium Fertilizer in Southern Iowa”, Iowa State University Research and Demonstration Farms Progress Reports 2019(1).
Downloads:
Download PDF
View PDF