Department of Soil Science, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Nainital, U.P., 263 145.
In a field experiment on an Aquic Hapludoll (Beni silty clay loam) highest grain and straw yield and nitrogen uptake of rice (var. ‘Alanhar’) urea supergranules (USG) were deep placed. Nitrogen use efficiency (NUE) was highest from USG deep placed as compared with others. The flood water pH ranged from 7 1 to 8.3 at 0800 hours and 7.4 to 9. 1 at 1400 hours up to 19 days after flooding. Ammoniacal nitrogen concentration and PNH in flood water was lowest with this nitrogen source.
Nitrogen, flooded rice, urea
