An experiment was conducted at AICRP on STCR, ARI, Rajendranagar, Hyderabad to
evaluate the performance of multinutrient extractant AB-DTPA in comparison with the standard
method (Olsen’s method) during 2019-20. Geo-referenced surface soil samples were collected
through a random sampling technique from in and around Ranga Reddy district of Telangana.
These soils were screened for available phosphorus status and thirty soil samples were collected
with ten samples from each category viz., low, medium and high phosphorus fertility levels. The
amount of available phosphorus extracted by Olsen’s extractant (112 kg ha -1 ) was found to be
numerically more compared to AB-DTPA extractant (82 kg ha -1 ). The correlation coefficient
between Olsen’s and AB-DTPA extractant during estimation of available P in varying native
phosphorus status soils was found to be 0.84** in low P soils, medium P soils (r = 0.86**) and
high P soils was (r = 0.87**) while in case of overall soils it was found to be (r = 0.94**). It can
be concluded that Olsen's and AB-DTPA extractable phosphorus were equally good indices for
estimating available phosphorus. Hence, AB-DTPA can be used as an extractant for the
estimation of available P in neutral and alkaline soils.