Organic fertilizers Fertilizers 113 Microorganisms 27 Brassica 19 Bok choy 15 Soils 15 Vegetables, Chinese 15 more ... Compost 13 Grasses 13 Corn 12 Mycorrhizas 11 Sandy soils 11 Organic farming 10 Turfgrasses 10 Bermuda grass 8 Seedlings 8 Soil chemistry 8 Spinach 8 Agricultural wastes 7 Cynodon 7 Soil fertility 7 Hot peppers 6 Vegetables 6 Humus 5 Hydroponics 5 Organic wastes 5 Organic wastes as fertilizer 5 Peppers 5 Sweet potatoes 5 Yield 5 less ...