Institute of Agriculture, Anand, Gujarat
Total and available zinc, copper, boron, molybdenum and cobalt status of surface soils of Gujarat and their depthwise distribution have been studied. Most of them are well supplied with available Cu. B and Mo but in a number of soils zinc application may be useful for growing healthy crops. About 30 per cent of the soils contain available cobalt below the minimum level for the normal health requirements of grazing animals. The micro-nutrient contents in plants growing in goradu (yellowish brown, alluvial sandy loam) soil have been determined and their relationship with the available content in soil discussed. Deficiency and toxicity symptoms due to lack or excess of some of them have been recorded in cluster bean, egg plant, Indian bean, bidi tobacco, blue panic grass, paddy, maize and pearl millet grown in sand culture and their optimum levels investigated. Cu-Mo and Ca-B relationships under deficiency, sufficiency and toxicity levels have been examined.
