Identification of Suitable Spectral Bands Related to Soil Properties of Major Soils of Telangana, India

Abstract

A study was conducted to identify suitable spectral bands related to soil properties of major soils of Telangana using hyperspectral data. A total of 200 surface soil samples were collected from district of Sangareddy (20 soil samples), Yadadri Bhuvangiri (20 soil samples), Nizamabad (20 soil samples), Adilabad (20 soil samples), Jayashankar Bhupalpally (60 soil samples), Nagar Kurnool (20 soil samples) and Nalgonda (40 soil samples) analyzed for soil properties viz., pH, electric conductivity (EC), organic carbon, total nitrogen, total phosphorus, total potassium, soil texture (percent clay). Soil spectral data (350-2500 nm) was measured using ASD spectroradiometer and correlated with soil properties using Pearson correlation test. Result shows that the soil properties like pH, OC, total N, total K , total Mn, % Clay showed significant negative correlation at 1210-1280 nm (r= -0.345**) for Ph, 610-630 nm (r= -0.415**) for OC, 390-410 nm (r= -0.180*, 0.183*, 0.175*, 0.170*) for total N, 360-390 nm (r= -0.174**,-0.158**,-0.163**,0.160**) for total K , 590-610 nm (r= -0.527** and -0.526**) for clay %.However significant positive correlation was observed with ECand 1110-1130 nm (r= 0.150* and 0.149*). These sensitive bands for soil parameters can be further used for prediction of soil properties.