Standardization of micronutrients ranges in mango (Mangifera indica L.) by orchard surveys.
Pramod Kumar, Rehalia A. S.
Author Affiliation: Department of Pomology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), India.
Asian Journal of Horticulture 2 : 218-221
Abstract : The present investigation was carried out in Himachal Pradesh, India, during 2004 and 2005, to assess the micronutrient element status of mango orchards. Twenty representative orchards were selected throughout 4 districts of Himachal Pradesh, i.e. Kangra, Una, Hamirpur and Bilaspur. Optimum sample size of 20 trees from each orchard of high productive category (>90 kg/tree) were selected randomly on the basis of apparent performance and the past history of the trees. Leaf samples were analysed for micronutrient contents (Fe, Cu, Zn and Mn). Soil chemical characteristics were also assessed. Leaf micronutrient content varied from 176.5 to 192.0 ppm for Fe, 13.5 to 26.2 ppm for Cu, 27.5 to 38.8 ppm for Zn and 68.3 to 79.7 ppm for Mn. For balanced fertilization and sustainable production of Dashehari orchards under the agroclimatic conditions of Himachal Pradesh, the micronutrient standards, i.e. 177.1-191.2 ppm Fe, 13.8-26.0 ppm Cu, 28.0-38.5 ppm Zn and 68.9-79.1 ppm Mn, were developed.