What makes up the majority of the solid (non-pore) portion of the soil?

In general, soil contains 40-45% inorganic matter, 5% organic matter, 25% water, and 25% air. In order to sustain plant life, the proper mix of air, water, minerals, and organic material is required. Humus, the organic material in soil, is composed of microorganisms (dead and alive) and decaying plants.

Explanation:

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.