Bacteria Approximately 300-3,000 lbs/acre Perform nutrient cycling, disease suppression, improve water holding capacity

Fungi Approximately 500-5,000 lbs/acre Increase plant surface area for nutrient uptake Drought tolerant Leak glomalin

Protozoa Approximately 5-200 lbs/acre Make nitrogen available to plants by eating bacteria Rely on water films Sand Protozoa Bacteria

Nematodes Approximately 1-100 lbs/acre Nutrient cycling by eating other nematodes, protozoa, bacteria, and fungi Up to 100/t in Ag soils or 50-500/t in grassland soils

Arthropods Shred organic material Stimulate microbial activity Excrete plant available nutrients Enhance soil aggregation Control pests Oribatid Turtle Mite Sowbug

Earthworms Approximately 10-1,000 lbs/acre Alter soil structure Water movement Nutrient dynamics