As an essential nutrient potassium (K) plays a critical role in corn plant development and chemical processes. As a result of the number of roles it plays in the plant, potassium uptake and utilization often interacts with the availability and uptake of other nutrients.
The purpose of this project is to evaluate some of the Variable Rate Nitrogen programs against a check to see if they can reduce the amount of N per bushel of corn produced and to see if there is enough economic return to pay for the program.
The goal of this project is to evaluate the optimal time to inter-seed cover crops while simultaneously applying nitrogen. While this practice has become more popular, very little field-scale research has been conducted to determine how early we can inter-seed cover crops to maximize their benefit while still maintaining yield.
We are interested in working with Sulfur and its effects on Nitrogen uptake. We have seen a definite advantage to using more Sulfur and we are wondering if we could see more benefits in our banded situation with our strip till system.
Many corn growers in Minnesota install subsurface (tile) drainage to remove excess water from their fam1land. While this practice greatly enhances agricultural productivity, it can also cause leaching of excess inorganic nutrients, especially nit rate, from soil to surrounding water environments.
Nitrogen (N) and phosphorus (P) contamination of surface waters from non-point source agricultural pollution are a serious concern nationwide, as well as in the Midwestern US, including Minnesota. Hypoxia in the Gulf of Mexico has been an issue since the mid 1980’s
Nitrogen mineralization has been difficult to assess. Many attempts have been made to develop indices of N mineralization, but the methodologies to do so have been elusive. These attempts have included laboratory methods of chemical extractions (Keeney, 1982) and incubation studies (Stanford and Smith, 1972)
Matt Wiebers: Joe Hopkins, Dusty Zander, Chad Hoese
The University of MN publication 08560 and related regional publications provide guidance on N rate choices for corn farmers in Minnesota.
Split application of nitrogen has gained popularity with growers on corn acres as a way to potentially increase nitrogen efficiency, crop yields, net profit, as well as decreasing nitrogen loss. This typically means applying a portion of nitrogen pre-plant, followed by a seasonal application (top-dress) at the V4 to V7 growth stage.
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