Web-based Adapt-N case study on N use
The late-planted corn had considerable excess N, especially on soils with high organic matter. This indicates that pre-plant N rates were too high for June planted corn and could have been reduced by an average of 100 lbs/ac. This would have reduced environmental impacts as well as fertilizer input costs (by about $11,000 for this farm), especially for the soils with high organic matter contents.
In all, this case study shows that delaying the bulk of N applications to sidedress time and estimating fertilization rates with Adapt-N based on localized factors – soil, crop, and weather – can have significant benefits for both farm profits and reduced environmental losses. In upcoming What’s Cropping Up? articles, we will report on the results of 2011 strip trials that evaluated the performance of Adapt-N through yield results.
Adapt-N research and demonstration work is supported by funding from the New York Farm Viability Institute and the NRCS Conservation Innovation Grants program. For more information about the Adapt-N tool, visit (http://adapt-n.cals.cornell.edu).
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