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Criteria for assessment of the residual value of fertilizer phosphorus

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Field Value
 
Title Criteria for assessment of the residual value of fertilizer phosphorus
 
Creator Sahrawat, K.L.
 
Subject phosphorus
residues
Vertisols
Sorghum bicolor
rainfed farming
yields
 
Description Sorghum yield and P uptake response data from a field experiment conducted at the ICRISAT farm, Patancheru (near Hyderabad) consecutively for four years (1987–1990) were used for determining the residual value of fertilizer P under rainfed cropping on a Vertisol acutely deficient in P. There were seasonal differences in the residual values of P. But more importantly, the residual P value varied depending on the criteria employed for crop response. On an average, the residual value of fertilizer P in the succeeding season was 52 per cent as effective as the fresh P when dry matter yield response was used as the criterion. The residual value of applied P was found to be 47 per cent as effective using grain yield response as the criterion, and the residual P was only 35 per cent as effective as the fresh P when total P uptake response was used as the criterion. It is suggested that the dry matter yield response of sorghum is a simple and practical criterion for determining the residual value of fertilizer P under rainfed cropping.
 
Date 2000
2021-06-22T14:28:26Z
2021-06-22T14:28:26Z
 
Type Journal Article
 
Identifier Sahrawat K.L.Criteria for assessment of the residual value of fertilizer phosphorus. Journal of the Indian Society of Soil Science.2000, Volume 48, Issue 1: 113-118.
0019-638X
https://hdl.handle.net/10568/114072
http://www.indianjournals.com/ijor.aspx?target=ijor:jisss&volume=48&issue=1&article=022
 
Language en
 
Rights Other
Limited Access
 
Format 113-118
 
Source Journal of the Indian Society of Soil Science