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Soils --- Phosphorus --- Sewage sludge --- Animal waste --- Phosphorus content --- Congresses --- Environmental aspects --- 631.416.2 --- 631.879.2 --- 636.002.68 --- 631.862 --- -Phosphorus --- -Sewage sludge --- -Soils --- -Earth (Soils) --- Mold, Vegetable --- Mould, Vegetable --- Soil --- Vegetable mold --- Agricultural resources --- Plant growing media --- Regolith --- Land capability for agriculture --- Biosolids --- Sludge, Sewage --- Sewage disposal --- Group 15 elements --- Nonmetals --- Farm waste --- Livestock waste --- Packing-house waste --- Slaughtering and slaughter-houses --- Agricultural wastes --- Factory and trade waste --- Phosphoric acid --- Sewage as fertilizer --- Animal wastes. Animal dung. Animal manure--(as a problem) --- Farmyard manure. Animal dung. Stable muck (including sullage, liquid manure) --- -Congresses --- Waste --- -Phosphoric acid --- 631.862 Farmyard manure. Animal dung. Stable muck (including sullage, liquid manure) --- 636.002.68 Animal wastes. Animal dung. Animal manure--(as a problem) --- 631.879.2 Sewage as fertilizer --- 631.416.2 Phosphoric acid --- -631.862 Farmyard manure. Animal dung. Stable muck (including sullage, liquid manure) --- Earth (Soils) --- Environmental aspects&delete& --- Phosphorus content&delete& --- Soils - Phosphorus content - Congresses --- Phosphorus - Environmental aspects - Congresses --- Sewage sludge - Congresses --- Animal waste - Congresses