I am working on land suitability analysis of Apple in a small district of Arunachal Pradesh (India) using multi-criteria evaluation technique but it is difficult to get the soil information like depth, texture, pH, organic carbon, etc. If any one have used such soil data at any scale kindly share the source so that I can try it out. Also, whether the field data collected from selected points of the study area can be interpolated for the whole area? kindly share and suggest the technique...