Comparison of Fall-Applied N Under Formed Beds with Conventional Spring N Application for Corn Production1
- Fred C. Boswell,
- J .G. Futral and
- O. E. Anderson2
Few studies have been reported on the comparison of fall- and spring-applied N for crop production in the Southeast, especially when nitrification inhibitors have been used to ameliorate N losses due to leaching. Because of the agronomic advantages inherent to such a practice, research was needed to assess its feasibility. A study was begun to 1) compare the efficiency in corn (Zea mays L.) production of fall-applied N under formed beds, with and without a nitrification inhibitor, with spring-applied N conventionally, and 2) determine the influence of these practices on certain plant constituents. Results indicate that moisture conditions for early planting and plant emergence under formed beds were excellent. In only the 1st year of the 3 years, did fall-applied N with a nitrification inhibitor result In greater corn grain yield (P = .01) than did the same N rate (156 kg/ha) without the inhibitor. Fall-applied N (156 kg/ha rate), with or without the inhibitor, was as efficient in corn production as a split application of half in the fall and half as sidedressing, or a preplant application plus sidedressing. For 2 of 3 years, tissue sampled at the silking stage had a higher N content when the N was applied split than did tissue where all the N was fall-applied.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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