soils alluvial alkaline ias pmfias peaty pmf saline lateritic laterite terai marshy rocks khadar bhangar arid silt
soils alluvial laterite saline marshy peaty alkaline
geography zones classification climatic soils agro figure1 upsc worksheet
soil india types geography resources development major political class type sst following each chapter laterite alluvial various mountain desert answer
soils different alluvial loamy laterite sandy morphological reflectometry sensors prospects significance moisture saline alkaline usda nrcs composition mountain marshy peaty
soil india types soils major which categories characteristics divided broad conservation central board has