FERTILIZERS

(See also Agriculture; Soil)

compost: g92 3/22 26-27

guano (South America): g03 5/22 27

lightning-produced: w05 11/15 16; g89 5/22 18

superiority over commercial: g89 5/22 18; g86 9/22 29

manure: it-1 658

pollute drinking water: g05 1/8 6-7; g90 10/22 29