Assessment of Some Extractants, Soil Depths and Parts of Leaf for Predicting the Availability of Soil Phosphorus for Mango (Mangifera indica)

Available P extracted by four reagents, from three depths of soil, was related to the total P in whole leaf, leaf blade and petiole in 30 orchards of Dashehari mango over two years. Olsen's reagent was found to be a better extractant. Relationships of soil P were observed to be consistently superior with the whole leaf as compared to leaf blade and petiole. All the three depths studied contributed to the foliar P significantly. Year to year variations in Olsen's P and P in the leaf were significant, possibly, because of ‘on’ and ‘off’ year cycles in mango.