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Fluid Journal : Fluid Journal 1996-1998
Fall 1997 Summary: Grain yield, total N uptake, and net economic return were generally optimized by point injecting UAN and preplant injecting anhydrous ammonia, compared with band and broadcast applications of UAN. Split applications did not produce higher yields, N uptake, or net economic return than single preemergence injections of N. The reported three-year average was highest with preemergence point injection of UAN into the ridge. These results suggest that a single preemergence spokewheel injection of UAN into the ridge, or a preplant anhydrous ammonia injection into the valleys can be successfully used to optimize N management in corn that follows soybeans. Nitrogen efficiency Drs. G.W. Randall, T.K. Iragavarapu, B.R. Bock Corn Responds Best To Spokewheel Injected UAN In Ridge-till Trials Minnesota scientists seek optimal N efficiency and minimal ammonia volatilization in four-year study.
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