Abstract
The effects of leaf age, leaf position on the shoot, sampling-direction and sampling-height of leaves of mango cultivar ‘Chausa’ on their mineral composition were studied. The P and K contents decreased, while Ca, Mg, S and Mn contents increased significantly with advancing age of leaves. In general, N, P, Mg, S, Zn, Mn and Fe contents were stable in 6- to 7-months-old leaves. P, K, Ca, Mn and Fe contents varied with sampling-direction, while K, Ca, S, Zn, Cu and Fe contents were significantly higher in the leaves from the lower portion than from the upper portion of the tree. A continuous increase in Ca and Mg contents and decrease in K and Mn contents of leaves were observed from basal to terminal leaves on a shoot. It was concluded that 6- to 7-months-old leaves from the middle of non-fruiting shoots, sampled from all directions and heights, were most suitable for assessing the nutritional status of a mango tree.
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