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RELATIONSHIPS BETWEEN LABILE PHOSPHORUS AND OLSEN PHOSPHORUS TEST VALUES OF ALKALINE SOILS

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dc.contributor.author A. Rashid
dc.contributor.author T. Hussain
dc.contributor.author A. Razzaq
dc.date.accessioned 2023-03-14T03:24:59Z
dc.date.available 2023-03-14T03:24:59Z
dc.date.issued 2001-09-07
dc.identifier.citation Rashid, A., Hussain, T., & Razzaq, A. (2001). Relationships between labile phosphorus and olsen phosphorus test values of alkaline soils. Pakistan Journal of Soil Science (Pakistan). en_US
dc.identifier.issn 1019-729X
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/18751
dc.description.abstract For the development of soil and plant phosphate (P) model, the soil labile-P values are required in addition to fertilizer P availability indices. This study was conducted to determine the relationship of labile-P (IRA-400 anion exchange resin, NaHCOs form) with a routine Olsen-P (NaHCOi extractant) method in order to develop predictive equations for labile-P. Nineteen alkaline surface soils representing a wide range of properties with initial P treatment at the rate of 0, 30, 00, and 90 mg P kg'1 soil were used in laboratory experiment for a 7- day and a 6-month incubation period. Labile-P (Pa) and Olsen-P (OP) increased with increased P rates. Pa related linearly to OP values at all Prates, showing a decreasing trend in correlation coefficient (r = 0.877" - 0.751" with a 7-day incubation; r - 0.856" - 0.643" with a 6-month incubation) with increased P rates. After a 7-day incubation, about 77% of variation in Pu were explained by the regression equation and it decreased to 50% at higher P rate. Both incubation periods showed similar relationships , indicating the feasibility of a 7-day incubation period for such studies. Using mean values of all P treatments of a 7-day incubation (76 soil P test values), the relationship was further improved (r = 0.92", P = 0.01) by a workable predictive equation of labile-P (Pa) from Olsen-P (OP): Pa = 7.936 + 1.385 OP, en_US
dc.language.iso en en_US
dc.publisher Faisalabad: Institute of Soil & Environmental Sciences University of Agriculture, Faisalabad. Pakistan en_US
dc.title RELATIONSHIPS BETWEEN LABILE PHOSPHORUS AND OLSEN PHOSPHORUS TEST VALUES OF ALKALINE SOILS en_US
dc.type Article en_US


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