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Is fall nitrogen application a good choice?

2013-11-08 22:07:00| Corn & Soybean Digest

By Emerson Nafziger, University of Illinois The big question many farmers have is whether or not to apply nitrogen fertilizer this fall or to wait until next spring. The fact that were seeing similar responses to fall- and spring-applied nitrogen would support that most fall-applied nitrogen stayed in the soil and available to this years crop. We are not seeing the unusually large responses to applied nitrogen this year that we would expect to see following high nitrogen losses. read more

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Sidedress Nitrogen Application Options

2013-06-11 18:04:00| Corn & Soybean Digest

Source: University of Missouri Extension The yellow leaves on corn plants means one thing: Nitrogen fertilizer applied last fall or early this spring is gone. It washed deep into the soil, beyond reach of the young roots. That means most fields will need additional nitrogen to reach full yield potential, says Peter Scharf, University of Missouri Extension soil scientist. read more

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Nitrogen Efficiency, Application Timing Increase Corn Yields

2013-04-22 22:29:00| Corn & Soybean Digest

Todays hybrids produce more corn yield per unit of nitrogen than older hybrids, according to a new Purdue study. Modern hybrids absorb more than half of their final N content after flowering. In fact, they absorb 27% more total N from the soil after flowering than hybrids grown between 1950 and 1990, says a newly released Purdue study. Todays hybrids absorb more grain-N during grain fill, as opposed to N being remobilized from plant leaves and stems. The higher amount and duration of N uptake contributed to better grain yields, even as actual grain N concentrations decline; hybrids are much more efficient. But as corn plants increase N use, they increase their uptake of other nutrients. read more

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