Nutrient management related to dry soil conditions
Phosphorus and K applied for this crop will remain in the soil if not removed in grain or forage. Availability of soil P and K should be sufficient for next season’s crop if soil test levels were in the maintenance range last season (not low). Phosphorus in the crop that remains in the field will be released with decomposition of the crop tissues in much the same way as N. Potassium will be leached from crop tissues by rainfall and should be returned to the soil more quickly than P or N. If P and K soil test levels were low prior to this season consider taking soil samples and making P and K applications next year if recommended as well.
References used in this article:
(1) Tamilee Nennich and Ken Hendrix. Determining a value for corn silage.. http://www.extension.purdue.edu/dairy/articles/ValueCornSilage.pdf
(2) Tamilee Nennich and Ken Hendrix. Corn silage crop calculator spreadsheet. http://webcache.googleusercontent.com/search?q=cache:VAgxPV6S6hAJ:www.extension.purdue.edu/dairy/articles/CornSilageValueCalculator2012.xls
(3) Ron Lemenager and Keith Johnson. Beef management practices when forages are in short supply.
(4) Sylvie M. Brouder and D.B. Mengel. The presidedress soil nitrate test for improving N management in corn. www.agry.purdue.edu/ext/pubs/AY-314-W.pdf