Effect of Method of Nitrogen Application on Corn (Zea Mays L.) Grown on Irrigated Sandy Soils1
- G. W. Rehm and
- R. A. Wiese2
Studies were conducted in 1970 and 1972 to determine the influence of method of Nitrogen application on corn production (Zea Mays L.) on irrigated, sandy soils. Conventional preplant and sidedress treatments were compared to situations where either preplant or sidedress applications were supplemented with added N in the irrigation water. Grain yields were recorded and the NO3--N distribution to 150 cm in the soil profile was measured at the end of the growing season. The influence of method of application on corn yields was related to the textural profile of the soil. For a sandy soil with no accumulation of fine textured material, the application of N with the irrigation water increased grain yields. Also, the corn crop recovered a higher proportion of the applied N when some fertilizer N was added with the irrigation water. For a soil type characterized by an accumulation of fine textured material at 50–70 cm below the surface, method of N application had no influence on yield since the downward movement and loss of NO3--N was restricted by the layer of fine-textured material. The data show that the application of a portion of the N fertilizer requirement with the irrigation water should be a recommended practice for corn production on sandy soils having no accumulation of fine-textured material.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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