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Fluid Journal : Fluid Journal 2008-2009
WINTER 2007 Fluid Journal 13 Figure 1. Yield increase of side-dressed, no-till corn, Kentucky, Schwab, et al. Figure 2. Yield increase of fall-seeded wheat, Missouri, Bowley. when oxygen is limiting (anaerobic conditions), soil bacteria use nitrate in place of oxygen. This process generates elemental N2 gas or N2O (nitrous oxide) gas, both of which are lost to the atmosphere. Losses are greatest under conditions of high soil moisture and warm temperatures. Losses can be up to several pounds of N per day. Slowed bacterial conversion of ammonium to nitrate (nitrification) by a nitrification inhibitor present in Agrotain Plus limits further losses of N by both nitrate leaching and denitrification. Education One strategy we've developed has been to educate growers across all markets on how our urease inhibitor can help them get the most from their N sources. With this year's higher N costs, we've focused on the economics of the growers' N investment. Not surprisingly, dealers and growers have been receptive to this message. In educating growers, the goal is to show the "how, where, when, and why" of using urease inhibitors. What exactly does our product do? In layman's terms it blocks an enzyme from being able to break down urea for a certain period of time. That time allowance provides opportunity for the surface-applied urea to be carried into the soil via rainfall or irrigation, as opposed to having to incorporate, and using costly fuel and time. Bottom line argument At harvest, we follow up with dealers and growers to make sure they see results from using our product. Our goal is to demonstrate that growers using urea or UAN can benefit from using one or more of our products. In a Kentucky study, for example, use of our product increased no-till, side-dressed corn yields by 25 bu/A (Figure 1). In another study, this time in Missouri on fall-seeded wheat, the use of our urease inhibitor increased wheat yield 12 bu/A, compared to UAN alone (Figure 2). Such results in the field are the bottom line argument for using Agrotain to protect against N losses in a market of rising prices. John Hassell is research and agronomic development manager for Agrotain International in West Lafayette, Indiana. Now on the Internet and Cataloged Click on and pass on valuable information to your customers! www.fluidfertilizer.com All articles published in the Fluid Journal. 175 150 117 175 150 125 100 Yield (bu/A) AGROTAIN PLUS DC UAN Untreated Source: U. of Kentucky - G. Schwab, L. Murdock Treatment: All received 50 lbs N/A at planting. AGROTRAIN PLUS and UAN received an additional 50 lbs N/A side-dressed. Nitrogen Management No-Till Corn: Side-Dressed 79.0 68.3 29.8 85.0 75.0 65.0 55.0 45.0 35.0 25.0 Yield (bu/A) AGROTAIN PLUS DC UAN Untreated Source: Missouri - Wheat Tech - C. Bowley Treatment: 40 lbs N/A at Feeke's 3, plus 60 lbs N/A at Feeke's 5 Nitrogen Management Fall Seeded Wheat: Split-Application
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