Crop return from diverse nitrogen fertilizer application techniques in spring barley sowings
2001
Ruza, A. | Linina, A. | Kreita, Dz. | Katamadze, M. (Latvia University of Agriculture, Jelgava (Latvia). Dept. of Crop Production)
Field experiments were conducted on cultivated silly clay Lessive Brown soils of the Research and Training Farm "Peterlauki" of Latvia University of Agriculture. The 10 local and perspective barley varieties grown in Latvia have been included in the experiment under 5 nitrogen fertilizer treatments. The objective of this study is to test the effect of diverse management techniques of N on the yield and quality of barley grain. The research results of 3 years average indicate that the conventional broadcast of fertilizer N prior to seeding is less effective. Efficiency of fertilizer applied after seeding is equally effective, and even somewhat higher with particular varieties compared to local input. The application of extra fertilizer N sub(30) in the tillering significantly raises both the yield of barley grain and that of the crude protein (CP) in grain for all the crop varieties
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