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bckv p k mani pabitra mani sludge mitigation option rice based cropping system heavy metal pollution soil pkmani sewage ltfe grahame model sports literature science use efficiency parameter core zpc crust coastal degraded soil gef funded project crop diversification energy input-output ratio energy use in cropping system salinity phyto remediation potassium and phosphorus balance mulching tillage phosphorus induced zinc deficiency inm tagore farmers liquid manures soil health vermi compost pollution heavy metal concorrenza quiz contest music stern model gapon exchange selectivity coefficient ion exchange quantity intensity relations diffuse double layer model gaines and thomas theorye lippman equation ligand exchange donnan system dlvo model gouy-chapman theory schofield's ratio law anion exchange tagged micro plot lysimeter plant nutrition arsenic pollution food chain chemistry of arsenic ground water contamination dina khadija conservation agriculture dina global warming effect on soil organic carbon hriday kamal tarafder crop residue management rice-wheat cropping system pabitra kr mani effect of fertilizers and manures zeta potential organic ammendments carbon pools pscu. ncu caoted urea nano biosensors smart seed smart delivery of fertilizers and pesticides sewage sickness cod bod sewage treatment sludge production tertiary treatment activated skudge waste handling for dairy mantle ages of earth brief time line of universe big bang diagram nebular model pedon regolith solum edaphology pedology soil forming factors soils bdm model iep stern layer ohp ihp agro industrial waste river systems and fluvial landforms volcanic landforms genetic landform classifications major landforms geomorphology basics of geomorphology 15n tagged isotope dsr nitrogen managemnt sri transplanted rice agronomic efficiency recovery efficiency nitrogen mangement ssnm low land rice spad zero waste waste management clarke of concentration mantle; p wave and s wave oddo harkins rule composition of earth an introduction to geomorphology gilbert's concept darwin's concept davis concept hutton's concept geomorphic process-agent cause and product catastrophic concept uniformitarianism geologic time scale glacial landforms aeolian landforms lcc