Soybean Growth Response to Low Rates of Nitrogen Applied at Planting in the Northern Great Plains
作者： S. L. Osborne , W. E. Riedell
DOI: 10.1080/01904160600686007
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摘要: ABSTRACT Cool and wet soils at the time of soybean [Glycine max (L.) Merrill] planting in northern Great Plains may reduce early crop growth retard nitrogen (N) fixation. Application N as starter fertilizer increase initial soybean, but also negatively impact fixation when environmental conditions improve. The objective this study was to evaluate low rates applied on Plains. A field experiment (2000–2002) established within a two-year corn [Zea mays (L.)] rotation using split-plot design with four replications. Whole plots were no-tillage (NT) conventional tillage (CT) split (two sources × rates) treatments. Nitrogen either ammonium nitrate (AN) or urea (UR) each 0, 8, 16, 24 kg ha−1. Biomass both 2000 2001 growing seasons increased significantly increasing rate stage...
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