Sign up for email alerts of new Fluid Journal issues!
Fluid Journal : Fluid Journal 2005-2007
14 Fluid Journal WINTER 2007 DR. GEORGE REHM, DR. JOHN LAMB, AND MARK BREDEHOEFT Grower interest in use of banded fluid fertilizer at planting is increasing. This renewed interest is due, in part, to frequent observations that banded fertilizer increases crop growth and subsequent yield. Compared to the once popular 2x2 placement (commonly called starter fertilizer), there are now several inexpensive attachments that can be added to planters to place fertilizer in a band near the seed at the time of planting. These attachments provide an easy way for fluids to be placed close to the seed while allowing for some soil between the seed and fertilizer. A multi-row planter can be easily A Look At Seed-safe Applications Of Fluids Multi-Year study looks at how well fluid fertilizers fit in with concept of placing fertilizer close to seed at planting. SUMMARY This study was designed to evaluate the effect of placement (with seed, on top of seed, and below seed) of three fluid grades (10- 34-0, 4-10-10, and 3-18-18) at two rates on emergence and yield of corn, soybeans, and sugarbeets. Fluid placement had little effect on corn emergence on silty clay loam sites, but did have an effect where the soil texture was a loamy fine sand. High N rates caused an emergence reduction on sandy soil. Generally, these materials reduced emergence when placed close to the seed. Use of 10-34-0 at a low rate in the sandy soil improved yield when band was placed so that there was some soil between seed and fertilizer. In general, 4-10-10 and 3-18-18, either in contact with or near the seed, improved yield when both rates were applied in the sandy soil. In soybeans, largest reduction in emergence occurred with 10-34-0 and least with 3-18-18. A reduction of 37 percent was associated with placement of 10-34-0 with the seed. While all factors had a significant effect on soybean emergence, there was no effect on soybean yield. Sugarbeet emergence was not significantly affected by treatment, possibly because two lower starter rates were used and the sugarbeet was coated, thus protecting the seed from fertilizer damage. modified to apply banded fertilizer near the seed for a relatively low cost. Research funded by the Fluid Fertilizer Foundation in the mid- '90s showed that relatively high rates of fluids (10-34-0, 4-10-10, 7-21-7) could be applied in direct contact with corn seed at planting with no negative impact on either emergence or yield if soils were not sandy or dry. The soybean crop was less tolerant of seed-placed fertilizer. Recent research in Iowa has documented the positive benefits of several fluids placed near, but not in contact with, or very close to corn and soybean seed at planting. More recent research in northwestern Minnesota has shown that 10-34-0 applied at low rates in contact with seed has very positive effects on both yield and quality of the sugarbeet crop. Because of the ease of handling and the accuracy of calibration, placement near the seed is an ideal fit for the use of fluid fertilizers. Therefore, this study was conducted to evaluate the effect of placement of fluid fertilizers near the seed on emergence and yield of corn, soybeans, and sugarbeets. Emergence Corn. Results varied with soil texture (Table 1). The fluid material, rate of application, and placement had no significant effect on corn emergence at the site with the silty clay loam texture. The soil at this
Fluid Journal 2002-2004
Fluid Journal 2008-2009