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Modified form of urea for pearl millet - wheat sequence under subtropical conditions

Research Notes
Apurba Sarkar
Project Directorate for Cropping Systems Research (ICAR), A-1, Pallavpuram, Modipuram, lndia-250 110
A.S. Faroda
Department of Agronomy, Haryana Agricultural University, India-125 004
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Keywords

Pearl millet
Wheat
Urea supergranules
Bitumen-coated urea
Bitumen-coated urea supergranules
Slow release nitrogen fertilizer

How to Cite

Modified form of urea for pearl millet - wheat sequence under subtropical conditions. (1993). Tropical Agriculture, 70(3). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/7112
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Abstract

Pearl millet and wheat were grown in sequence during 1986-1987 and 1987-1988. Nitrogen was applied to pearl millet in the form of urea, bitumen-coated urea (BCU), urea supergranules (USG), and bitumen-coated urea supergranules (BCUSG) at 0, 40, 80, and 120 kg N ha-1. Grain, dry matter (DM) yield, and plant height of pearl millet were highest at 120 kg N ha-1 with BCUSG. The next highest were USG and BCU. These rates and forms of N showed residual effects of soil NH4+-N after millet harvest which increased grain, DM yield, and plant height of unfertilized wheat grown subsequently. Modified forms of urea are recommended as better sources of urea N at 120 kg N ha-1 in such a sequence.
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