soil erosion soils degraded area yr tonnes maji wastelands preliminary statistics assessment degradation organizations 2008a
maji acid 2008a soils source wastelands degraded preliminary spatial
spatial degraded wastelands distribution status india
kashmir jammu geographical precipitation marked observation pahalgam srinagar kupwara gulmarg meteorological acp implications analyses 1980
lands degraded degradation estimates wastelands unit nrsc lup nbss extent nrsa 2005