Study on micronutrients in aonla (Emblica officinalis G.) orchards in semi arid zone of Rajasthan

Twenty representative Aonla orchards of Chomu Tehsil (district Jaipur) of Rajasthan were selected and depth wise composite soil samples were collected from 0 to 30, 30 to 45 and 45 to 60 cm. The textural classes of the soils varied from sandy loam to loamy sand. The calcium carbonate content in soils showed increasing trend with depth and it increased significantly with increased in sand, available calcium, pH and magnesium. The soils of study areas were non-saline in nature and EC values decreased with the increase of soil depth. The organic carbon content in soils has been found to be low. Amongst micronutrients, available Fe, Zn and B contents in soils of most of the orchards have been found deficient while, Cu and Mn were found deficient to medium. Analysis of aonla leaf samples showed that the concentrations of Fe and Cu were found sufficient in majority of samples but the concentrations of Zn. Mn and B in leaves falls under low range.