Evaluating the soil nutrient status using gis and remote sensing technology-A case study at Coimbatore district

Soil nutrients are the major source of plant nutrition that helps for the plant growth. Soil resource is currently facing threats due to various soil nutrients deficiency. Assessing the spatial variability of soil nutrients quality is necessary for agriculture. Quickly and efficiently monitoring soil nutritional status using remote sensing technology is of great significance for farmland soil productivity, food security and sustainable agricultural development.

The present study focuses on spatial variability of soil quality. Current research has been conducted to estimate and map soil nutrient contents in large areas using GIS technology and other related maps were prepared from remote sensing data in ArcGIS 10.1. 288 soil samples were collected for the study from different Blocks of the Coimbatore District of Tamil Nadu. The Organic carbon, N, P, K, pH and EC status of the soil were analysed and reported.

The organic carbon status of the soil is very low in most of the parts of Coimbatore and the pH status is slightly alkaline. The primary nutrients N, P and K were found to be low and found to have micronutrient imbalance which is highly influenced by the changes in pH.