Authors : J. Karpagam, K.S. Subramanian and N. Rajesh
Abstract: Micronutrients are as essential as macronutrients but required in smaller quantities by plants. Crop growth, quality and yield of many crops may be affected if any of essential micronutrients such as zinc, iron, copper, manganese, boron, molybdenum and cobalt are lacking in the soil. Over the years with intensive cultivation, Indian agriculture has moved from an era of scattered single element deficiencies to more complex multiple nutrient deficiencies. It is essential to have an idea of depletion studies and future projections for prediction of micronutrient requirements. Refinement of critical level and delineation of micronutrient deficient and toxic areas. Integrated nutrient management is used with greater thrust on organic to improve the micronutrient availability and to reduce micro nutrient fertilizer level. In the context of today’s changing scenario, there is a need to generate the spatial data of micronutrients using Global Positioning System (GPS) and the spatial variability maps for individual nutrient (Zn, Fe, Cu and Mn) is prepared using GIS software.
J. Karpagam, K.S. Subramanian and N. Rajesh, 2018. Delineation and Mapping of Soil Available Micronutrients Status in Virudhunagar District of Tamil Nadu using GIS and GPS Techniques. Research Journal of Agronomy, 12: 1-7.