Delineation and Mapping of Micronutrients Status through GIS Technique for Arecanut Gardens under Traditional and Non Traditional Areas of Karnataka
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 3
Abstract
Delineation of spatial distribution of micronutrients was studied from 232 acres covering 65 arecanut farmers representing different eco-systems such as traditional hilly, extended non-traditional areas under tank fed, bore well fed and canal fed irrigation in Shivamogga, Chikkamagaluru and Davanagere districts of Karnataka, India. The chosen gardens were 15-18 years old with medium management. The standard technique of grid method with a spacing of 50x50 m was employed to draw soil samples from the selected study area at 0-30 cm depth with Geo-referencing through GPS identity. Samples were analyzed for DTPA (DI-ethylene Tri-amine Penta Acetic acid) extractable iron, manganese, copper and zinc. Nutrient index values, fertility ratings and percentage deficiency were calculated from the analytical results. Using these data in a GIS environment, fertility mapping of each area was done. Traditional area had acidic soils while others are basic in reaction. Among the different micronutrient studied iron, manganese and copper are in sufficiency level. Zinc was found to be deficient and critical in traditional, tank fed and bore well fed situations. Kerehosalli of bore well fed area and Chikkingala of tank fed are recorded lower zinc status with nutrient index value of 1.28 and 1.82 with low and inadequate fertility status and demands keen attention for management.
Authors and Affiliations
Dinesh Kumar, Binny Gopal, B. C. Dhananjaya
Keywords
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