Summary
Field experiments were conducted to assess the efficiency of different forms and methods of urea application for direct sown rice under intermediate deep water situation (15–50 cm). Basal application of N @ 40 kg/ha in the form of prilled urea (PU); urea super granules (USG); and sulphur coated urea (SCU); were tested with a view to improving the early vigour, tillering and grain yield. Deep placement of prilled urea behind a plough; USG placement between rows in moist soil; and also in shallow water were found to increase the recovery of nitrogen. There was no deleterious effect on stand establishment when the seed and fertilizer @ 40, 8.6 and 16.6 kg N, P and K per hectare respectively were drilled in the same furrow in moist soil. Split application of either conditioned urea or application as a foliar spray did not prove effective in an intermediate deep water rice situation.
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Rao, M.V., Reddy, B.B., Ghosh, B.C. et al. Nitrogen management in direct sown intermediate deep water rice (15–50 cm). Plant Soil 83, 243–253 (1985). https://doi.org/10.1007/BF02184296
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DOI: https://doi.org/10.1007/BF02184296