Influence of Previous Crop and Nitrogen Mineralization on Crop Response to Applied Nitrogen
1971
Hipp, B. W. | Gerard, C. J.
Experiments were conducted under irrigated, subtropical conditions to evaluate the influence of previous crop on NO₃-N distribution in the soil profile and subsequent response by cotton (Gossypium hirsutum L.) and grain sorghum (Sorghum bicolor (L.) Moench.) to plied N. Responses to N were obtained with cotton and grain sorghum if planted immediatdy after cabbage (Brassica oleracea var. capitata), but responses to N were small or non-existent if the area was fallow from September until March. Fall and winter temperatures are warm enough that N mineralization allows accumulation of NO₃-N in the soil profile and may preclude a response from application of N.
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