DefinePK

Abstract

ABSTRACT Trace elements have long been recognized as Essential Plant Nutrients. Many plant disorders have been recognized as trace element deficiencies. Recommendations have, therefore, been made to use minimal supplements of trace elements for all chemical fertilizers to minimize the fluctuations and availability of these elements to plants. Amongst the micro-nutrient elements, boron is perhaps the most important and plays a very important role in soil-plant relationship. It has a marked effect on crop growth, both from the standpoint of plant nutrition if it is deficient in soil, and of toxicity if it is present in excess. Boron is the 25th element in order to abundance on the earth�s surface, and 12th in order of abundance in plants and animals (Robinson, 1953).