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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10047

Title: Urea and Urea-Based Fertilizers Influence on Oat Forage, Yield, Nitrogen Uptake and Nitrogen Leaching Losses
Authors: A. S. Modaihsh
Issue Date: 1992
Publisher: J. King Suad Univ
Abstract: A pot experiment was conducted under greenhouse conditions, using a sandy loam calcareous soil to evaluate the effect of urea and urea-based fertilizer, N-application rate and leaching fraction on oat dry forage yield, N-uptake and N-leaching losses. At low leaching fraction (L1), single (U1) and split (U2) urea additions were superior to the sulfur coated urea (Scu) and urea formaldehyde (UF) at low and high N-rates of application (80-160 ppm). At high leaching fraction (L2), yield and N-uptake were significantly reduced for all treatments except Scu. U2 and Scu proved to be more effective, at high leaching and high N rate, giving higher yield, higher N uptake, better forage yield seasonal distribution and less N-leaching loss. Nitrogen leaching losses varied from 1.1 to 11.8% of applied N and were mainly in the NO3 form except when urea was mixed with sulfur (U1+ S), where leaching in the NH+4 form was of considerable magnitude.
URI: http://hdl.handle.net/123456789/10047
Appears in Collections:College of Foods And Agricultural Science

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