Effects of biuret content in urea and nitrogen source on the yield and composition of potato tubers |
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Authors: | R C Sharma J S Grewal K C Sud S S Saini |
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Institution: | (1) Division of Crop & Soil Science, Central Potato Research Institute, Simla, India |
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Abstract: | Summary Pot and field experiments were conducted at Simla and Daurala to investigate the effect of biuret content of urea and N source
on the yield and composition of potato tubers. Soil application of urea containing biuret upto 1.0 per cent did not affect
the yield. However, in foliar application of urea detrimental effect of biuret was recorded even at 0.5 per cent. In foliar
application of urea, the removal of N, P, and K by tubers was reduced with increasing levels of biuret. In slightly acidic
soil of Simla, performance of calcium ammonium nitrate and urea was at par with respect to potato yield, whereas in alkaline
soil of Daurala, urea was comparatively inferior. In both soil types, the apparent recovery of N by tubers was higher with
calcium ammonium nitrate than with urea. The efficaciousness of urea was increased by applying half of its dose to soil at
planting and the other half as foliar sprays. |
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