Journal of Experimental Biology and Agricultural Sciences http://www.jebas.org ISSN No. 2320 – 8694 Journal of Experimental Biology and Agricultural Sciences, February - 2018; Volume – 6(1) page 108 – 115 MICRONUTRIENT CATIONS DISTRIBUTION IN THE SOIL PROFILE OF ORANGE (Citrus reticulata) ORCHARD OF TAMENGLONG DISTRICT, MANIPUR (INDIA) Herojit Singh Athokpam 1 *, Konsam Vikramjeet 1 , Nandini Chongtham 2 , K. Nandini Devi 1 , Naorem Brajendra Singh 1 , N. Gopimohan Singh 1 , P.T. Sharma 1 and Punabati Heisnam 3 1 College of Agriculture, Central Agricultural University, Imphal – 795004, India 2 kvk, Central Agricultural University, Imphal – 795004, India 3 College of Agriculture, Central Agricultural University, Pasighat – 795004, India Received – October 31, 2017; Revision – December 11, 2017; Accepted – January 06, 2018 Available Online – February 20, 2018 DOI: http://dx.doi.org/10.18006/2018.6(1).108.115 ABSTRACT Vertical distribution of DTPA-extractable micronutrient cations (Zn, Cu, Fe and Mn) and their relationship with various soil properties were studied in sixteen profiles of orange orchard of Tamenglong district of Manipur. The DTPA-extractable Zn, Cu, Fe and Mn content were greater in the surface soils than the sub-surface horizons. In most of the profiles the value of Zn, Cu, Fe and Mn ranged from 0.20 to 1.75, trace to 0.80, 5.80 to 42.10 and 0.35 to 39.55 mg kg -1 , respectively. The content of DTPA-extractable Zn, Cu, Fe and Mn were higher surface and gradually decreased with the depth. DTPA-extractable Zn was found deficient in 73 per cent, marginal in 16 per cent and sufficient in 1.50 per cent in the soil samples while Cu, Fe and Mn were sufficient in all soils except one profile in Cu and Mn. Multiple regression co-efficient analysis showed that the extractable Zn, Cu, Fe and Mn content were influenced by silt, EC, Al2O3 and Mg to the level of 0.77, 0.80, 0.73 and 0.66, respectively. However, these micronutrient cations were significantly contributed only by silt and EC. * Corresponding author KEYWORDS DTPA Micronutrient Cations Orange orchard Profile E-mail: hathokpam@yahoo.in (Herojit Singh Athokpam) Peer review under responsibility of Journal of Experimental Biology and Agricultural Sciences. All the article published by Journal of Experimental Biology and Agricultural Sciences is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License Based on a work at www.jebas.org. Production and Hosting by Horizon Publisher India [HPI] (http://www.horizonpublisherindia.in/). All rights reserved.