Start Date

30-11-2000 12:00 AM

Description

Historically sulfur (S) application has not been recommended on Iowa soils for com and soybean production. Prior research in Iowa has not determined a consistent need for S fertilization, with field research predominantly indicating no com or soybean yield response to applied S (Thorup and Leitch, 1975; Webb, 1978; Alesii, 1982; Pierce et al., 1997; Sexton et al., 1998; Mallarino et al., 2000). In research conducted from the 1960's through the 1990's only three instances out of many comparisons resulted in statistically significant yield response to applied S. Two of the three were single-year com yield increases at individual sites (Tables 1 and 2), and one was a small but statistically significant corn yield decrease as an average over many years and sites - 146 bu/acre with S applied vs. 148 bu/acre without S (Pierce et al., 1997). Other trials have shown no yield response to applied S. An example is shown in Table 3 for research conducted by J. Webb (summarized by Pierce et al., 1997) with S fertilization of com and soybean at five sites in Iowa over a 14-year period.

DOI

https://doi.org/10.31274/icm-180809-722

Share

COinS
 
Nov 30th, 12:00 AM

Sulfur Application to Corn and Soybean Crops in Iowa

Historically sulfur (S) application has not been recommended on Iowa soils for com and soybean production. Prior research in Iowa has not determined a consistent need for S fertilization, with field research predominantly indicating no com or soybean yield response to applied S (Thorup and Leitch, 1975; Webb, 1978; Alesii, 1982; Pierce et al., 1997; Sexton et al., 1998; Mallarino et al., 2000). In research conducted from the 1960's through the 1990's only three instances out of many comparisons resulted in statistically significant yield response to applied S. Two of the three were single-year com yield increases at individual sites (Tables 1 and 2), and one was a small but statistically significant corn yield decrease as an average over many years and sites - 146 bu/acre with S applied vs. 148 bu/acre without S (Pierce et al., 1997). Other trials have shown no yield response to applied S. An example is shown in Table 3 for research conducted by J. Webb (summarized by Pierce et al., 1997) with S fertilization of com and soybean at five sites in Iowa over a 14-year period.

 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.