Manured fields are good candidates for the pre-sidedress soil nitrate test, but nitrogen credit following legume crops is unpredictable and will likely depend on the stand density and timely termination.
A summary of the 2016 pre-sidedress soil nitrate tests (PSNT) indicates PSNT is a useful nitrogen management tool on corn fields with repeated manure practices.
When done correctly, the PSNT is an excellent tool to determine available nitrate-N from organic matter mineralization, says Michigan State University Extension.
No-tillers who must apply manure late in the summer and also want to drill cover crops face a conflict. When storage nears capacity, manure must be applied to fields. But timely seeding of cover crops is crucial to establishing stands.
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Franck Groeneweg, who no-tills a variety of crops on more than 12,000 acres near Three Forks, Mont., shares how his massive Johnson-Su bioreactor system allows him to apply compost extract in furrow during planting season.
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