Diagnostic Leaf Analysis for some Fuelwood Trees

Seasonal changes in tbe foliar concentration of macro nutrients (N, P, K, Ca and Mg) in about 15 years old trees of A. nilorica, P. juliflora, D. sissoo and P. pinnata growing in sodic soils were studied Leaf N concentration were higber in these trees. Levels of P in leaves were lowest than other elements. Foliar K and Ca were higher during the summer. Leaf Mg showed a pattern of decreasing concentration with time. The best time for sampling these deciduous trees to get information on plant nutrient status appear to be end of summer or beginning or rains.