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 |