Abstract
A field study was conducted on a sandy clay soil (Entisol) in India to examine urea briquettes (UB) for lowland rice during 1986 and 1987. Grain yield was significantly greater for UB than a split application of prilled urea. At equal rates of N application, a spacing of 30 cm between two UBs was significantly better than 60 to 90 cm spacing. Two applications (10 DAT and at panicle initiation) of UB was no better than a single application (10 DAT). Placement of UB at 3–4 cm depth was significantly better than its surface application or placement at 0–1 cm depth.
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Katyal JC, Singh B and Vlek PLG (1988) Effect of granule size and the placement geometry on the efficiency of urea supergranules for wetland rice grown on a permeable soil. Fert Res 15: 193–201
Kumar V (1983) Agricultural Services and Promotional Activities. Indian Farmers Fertilizer Cooperative Limited, New Delhi pp 32
Obcemea WN, DeDatta SK and Boradbent FE (1984) Movement and distribution of fertilizer nitrogen as affected by depth of placement in wetland rice. Fert Res 5: 125–148
Prasad M and Prasad R (1980) Yield and nitrogen uptake by rice as affected by variety, method of planting and new nitrogen fertilizers. Fert Res 1: 207–213
Prasad R and DeDatta SK (1979) Increasing fertilizer nitrogen efficiency in wetland rice.In Nitrogen and Rice. IRRI, Philippiones, 465–484
Prasad R, Rajale GB and Lakhdive BA (1971) Nitrification retarders and slow-release nitrogen fertilizers. Adv Agron 23: 337–383
Prasad R, Singh S and De R (1984) Effect of time and method of application on the relative efficiency of prilled urea and urea supergranules for rice. J Agric Sci Camb 103: 549–542
Savant NK and DeDatta SK (1982) A transformation in wetland rice soils. Adv Agron 35: 241–302
Sawant NK, Craswell ET and Diamond R (1983) Use of urea supergranules for wetland rice—A review. Fert News 28(8): 28–35
Sharma SN and Prasad R (1980) Effects of rates of nitrogen and relative efficiency of sulphur coated urea and nitrapyrin treated urea in dry matter production and nitrogen uptake by rice. Plant Soil 55: 389–396
Thomas J and Prasad R (1982) On the nature of mechanisms responsible for the higher efficiency of urea supergranules for rice. Plant Soil 69: 127–130
Thomas J and Prasad R (1987) Relative efficiency of prilled urea, urea super granules, sulphur coated urea and nitrification inhibitor N-serve blended urea for direct seeded rice. J Agron Crop Sci 15: 302–307
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Singh, S., Prasad, R. & Sharma, S.N. Growth and yield of rice as affected by spacing, time and depth of placement of urea briquettes. Fertilizer Research 19, 99–101 (1989). https://doi.org/10.1007/BF01054681
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DOI: https://doi.org/10.1007/BF01054681