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This article in AJ

  1. Vol. 49 No. 3, p. 114-116



Effect of Various Sources of Nitrogen on Rice Paddy Yield1

  1. A. Wahhab and
  2. H. M. Bhatti2



Ammonium nitrogen gave much better rice yields than nitrate nitrogen. Calcium cyanamide and urea were also more effective than nitrate nitrogen. Nitrate nitrogen applied just before heading proved more beneficial to rice than that applied at the early stage of plant growth. Generally, ammonium sulphate increased rice yields more than the other nitrogen fertilizers tested.

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