تلخیص
Pot culture studies were conducted to find a suitable soil test for P nutrition of lowland rice on calcareous alkaline soils. Various sail P test procedures evaluated were: Olsen % AB-DTPA, NaHCOrEDTA and Mehlich's-3. Different soil properties viz.: EC, pH and lime related negatively with P determined by these methods. These properties also
had a negative effect on the rice dry matter yield and concentration and uptake of P by plants. Phosphorus extracted by Olsen, NaHCOrEDTA, AB-DTPA and Mehlich-3 had a highly significant correlation with dry matter yield and P uptake in plants. Phosphorus extracted by AB-DTPA both under aerobic and anaerobic conditions significantly correlated with each other.
M.S. Zia, M. Aslam, Rehmatullah, M.B. Khan , A. Ali. (1998) PHOSPHORUS AVAILABILITY INDICES FOR LOWLAND RICE IN ALKALINE CALCAREOUS SOILS, The Journal Soil & Environment , Volume 15, Issue (3-4).
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