title: Effects of trace elements on crop growth at toxic levels with special reference to sewage sludge.
mesh_terms: D000383:Agriculture; D005308:Fertilizers; D063245:Plant Development; D012722:Sewage; D014131:Trace Elements / Q000009:adverse effects* / Q000494:pharmacology; D014675:Vegetables
chemical_list: D005308:Fertilizers; D012722:Sewage; D014131:Trace Elements