Standardization of leaf-sampling technique for mineral composition of leaves of mango cultivar Chausa.
Chadha K. L., Samra J. S., Thakur R. S.
Author Affiliation: Central Mango Research Station, Rehmankhera, Lucknow, India.
Scientia Horticulturae 13 : 323-329
Abstract : The effects were studied of age, position on the shoot, sampling direction (facing north, south, east and west) and sampling height of mango (cv. Chausa) leaves on their mineral composition. P and K contents decreased, whilst Ca, Mg, S and Mn contents increased significantly with advancing leaf age. N, P, Mg, S, Zn, Mn and Fe contents were stable in 6- to 7-month-old leaves. P, K, Ca, Mn and Fe contents varied with sampling direction, whilst K, Ca, S, Zn, Cu and Fe contents were significantly higher in leaves from the lower portion than from the upper portion of the tree. It was concluded that 6- to 7-month-old leaves from the middle of non-fruiting shoots, sampled from all directions and heights, were the most suitable for assessing nutritional status.