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Optimum external and internal P requirements of soybean and wheat for maximizing production on a phosphorus deficient Typic Haplustert

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Title Optimum external and internal P requirements of soybean and wheat for maximizing production on a phosphorus deficient Typic Haplustert
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Creator Sammi Reddy K., Subba Rao, A. and Takkar, P.N.
 
Subject Solution P, plant tissue P, soybean P nutrition, external and internal P requirement, wheat P nutrition, Typic Haplustert
 
Description Not Available
A two-year field experiment was conducted to determine external (soil solution) and internal (plant tissue) P requirement of soybean and wheat crops grown in succession on a Typic Haplustert. Adjusted soil solution P concentrations increased significantly the seed yield of soybean and wheat up to a level of 0.1 mg P VI. Similarly, total P uptake by both the crops increased significantly up to 0.13 mg P VI. Relative yields and relative uptake by the test crops were plotted against solution P concentrations and index leaf P. The computed optimum concentrations of P in solution were 0.10 mg P VI for soybean and 0.11 mg P VI for wheat for obtaining 90 per cent of the yield. Similarly, the optimum external P requirements for 90 per cent of the P uptake were 0.12 mg P L−1 for soybean and 0.12–0.13 mg P L−1 for wheat. The optimum concentration of P was 0.25–0.26 per cent in third fully opened trifoliate leaf of soybean and 0.21–0.25 per cent in flag leaf of wheat.
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Date 2021-08-25T04:29:48Z
2021-08-25T04:29:48Z
1997-06-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/60385
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Soil Science