soil erosion soils degraded area yr tonnes maji wastelands preliminary statistics assessment degradation organizations 2008a
maji acid 2008a soils source wastelands degraded preliminary spatial
lands degraded degradation estimates wastelands unit nrsc lup nbss extent nrsa 2005
himachal landslides himalayan mountains
himachal pradesh figure landslides himalayan
himachal pradesh sanctuaries reserve biosphere haryana
distribution wastelands degraded spatial status india