Soil Biology Primer Authors: Dr. Elaine Ingham Andrew R. Moldenke & Clive A. Edwards Limited Availibility online. Buy it here NOW!! For farmers, ranchers, ag professionals, resource specialists, conservationists, soil scientists, students and educators. The Soil Biology Primer is an introduction to the living component of soil and how it contributes to agricultural productivity, and air and water quality. The Primer includes units describing the soil food web and its relationship to soil health, and units about bacteria, fungi, protozoa, nematodes, arthropods, and earthworm