Elaine Ingham and the Soil Biology Primer: soil life explained
Dr Elaine Ingham’s contribution to the USDA–NRCS guide connects knowledge of microorganisms with the functions of living soil.
A guide to life beneath our feet
The Soil Biology Primer describes soil’s living component and its contribution to production, water and the environment. Published with USDA–NRCS and the Soil and Water Conservation Society, it includes Elaine R. Ingham, Andrew R. Moldenke and Clive A. Edwards among its authors. The USDA’s suggested citation refers to the 2000 print edition.
Ingham’s contribution
Ingham authored chapters on the soil food web and soil health, bacteria, fungi, protozoa and nematodes. She explains how organisms feed, interact and transform organic matter. Soil structure, nutrient cycling and plant growth emerge as functions of a connected ecosystem. This helps us understand what we see under the microscope and what we seek to restore in the field.
From experimental research to education
A 1985 study involving Ingham examined microorganism and nematode interactions in controlled soil systems. Bacteria combined with bacterial-feeding nematodes increased initial nitrogen uptake and growth of the trial grass compared with bacteria alone. This provides a specific example linking the food web with plant nutrition.
A wider body of work
The Soil Food Web School publication list includes Ingham and colleagues’ research on microbial activity, mycorrhizae, feeding interactions and management effects on soil organisms. The Primer is an accessible route from individual organism groups to their relationships.
Knowledge becomes a practical tool
The School’s Foundation Courses connect soil biology with compost production, liquid applications and microscopy. Training gives us a shared framework for observation, recording and intervention design. The guide helps us explain these functions to growers and people discovering microscopic soil life.
Our field work
We use the Primer and our School training as foundations for research, composting and microscopic monitoring in our olive groves.