Effect of Controlled-Release Nitrogen Fertilizers on Yield and Nitrogen Absorption by Potatoes, Cantaloupes, and Tomatoes1
Year: 1972
Type: article
Abstract: In field studies with potatoes, cantaloupes, and tomatoes, using N sources banded in the soil, highest yields were obtained with (NH 4 ) 2 SO 4 . Yields with urea-formaldehyde and sulfur-coated urea were similar to each other, and less than those from urea. Nitrogen absorption, as determined by NO 3 - 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 (NH 4 ) 2 SO 4 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.
Authors: O. A. Lorenz, B. L. Weir, J. C. Bishop
Institution: University of California, Davis
Language: English
Subfield: Agronomy and Crop Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W4300106172