Abstract
One goal in conservation farming systems is to optimize fertilizer use while reducing the loss of soil by water erosion. This requires evaluation of fertilizer application methods that minimize physical disturbance of protective crop residues and the soil surface and allow efficient uptake of added nutrients by the crop. We conduncted this study to determine which of several surface and subsurface fertilizer application techniques would be the most beneficial to plant responses. A 3-yr randomized block study was conducted on a Houston Black clay (fine, montomorillonitic, thermic Udic Pellusterts) at Temple, TX. Nitrogen (N) and phosphorus (P) uptake and grain yield were measured for the sorghum [Sorghum bicolor (L.) Moench] test crop (...)
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