Sahrawat, K L (2000) Criteria for Assessment of the Residual Value of Fertilizer Phosphorus. Journal of the Indian Sociely of Soii Science, 48 (1). pp. 113-118. ISSN 0974-0228
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Abstract
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
Item Type: | Article |
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Divisions: | UNSPECIFIED |
CRP: | UNSPECIFIED |
Uncontrolled Keywords: | Dry mailer yield, P response, P uptake, rainfed cropping, Sorghum bicolor, Vertisol. |
Subjects: | Mandate crops > Sorghum Others > Soil Science Others > Fertilizer Applications |
Depositing User: | Mr Sanat Kumar Behera |
Date Deposited: | 30 Nov 2011 06:30 |
Last Modified: | 30 Nov 2011 06:30 |
URI: | http://oar.icrisat.org/id/eprint/4529 |
Official URL: | http://www.indianjournals.com/ijor.aspx?target=ijo... |
Projects: | UNSPECIFIED |
Funders: | UNSPECIFIED |
Acknowledgement: | UNSPECIFIED |
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