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  • Author or Editor: B.L. Bishop x
  • Journal of the American Society for Horticultural Science x
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In field studies with potatoes, cantaloupes, and tomatoes, using N sources banded in the soil, highest yields were obtained with (NH4)2SO4. Yields with urea-formaldehyde and sulfur-coated urea were similar to each other, and less than those from urea. Nitrogen absorption, as determined by NO3 - concn in the petiolar tissue or total N absorption by the entire plant, was in the same sequence as yields. Controlled-release fertilizers did not increase N absorption during late growth. About 90% of the N from (NH4)2SO4 and urea had nitrified and leached from the fertilizer band within 40 days after application. In contrast, about half of the N from urea-formaldehyde remained in the fertilizer band 120 days after application.

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