Soil Composition and Living Organisms

This lecture covers the composition and properties of soil, including the liquid and gas phases, mineral and organic constituents, and the role of living organisms such as bacteria, nematodes, and earthworms. It explores the functions of these organisms in soil structure, nutrient cycling, and ecosystem health, as well as their classification based on size, diet, and permanence in the soil. The lecture also discusses the diversity and density of soil organisms, their interactions with plants, and their importance in nutrient cycling and soil health.