ARS | Publication request: Nitrogen availability from liquid swine and dairy manure: results of on-farm trials in Minnesota

Submitted to: Extension Service Bulletins
Publication Type: Other
Publication Acceptance Date: September 17, 2008
Publication Date: October 1, 2008
Citation: Russelle, M.P., Blanchet, K., Randall, G., Everett, L. 2008. Nitrogen availability from liquid swine and dairy manure: results of on-farm trials in Minnesota. University of Minnesota Extension Bulletin 08583. 12 p.

Technical Abstract: In field experiments on 13 Minnesota farms, we found that University of Minnesota predictions of N availability to corn from dairy and swine manure were accurate when the manure was injected by knives or sweeps. Predictions of N availability were less accurate from broadcast-incorporated applications, presumably because ammonia losses were affected by local weather conditions before incorporation. Farmers may be able to improve the prediction of N availability from broadcast manure after considering the weather conditions that occurred between application and incorporation. However, to get the best value from manure N, direct incorporation is recommended.