1. Inorganic Material -Minerals that come from weathered rocks – Crystalline structures depending on the rocks they originated fro, Minerals contain different elements that are essential for plant growth – Released via weathering and absorbed by the plants.
2. Organic Matter
Formed from living and decayed organisms, accumulates in the upper part of the soil as humus.
Increases soil material because microbes decompose plant material – Release essential plant nutrients
Decays faster when there is oxygen present (aerobic decomposition), and slower when there is no oxygen because the soil is saturated (anaerobic decomposition)
- 3. Soil Water - Fill with water – At capacity = saturated– Drains to groundwater under gravity – Water drawn upwards via capillary action
- • Water held to soil pores due to surface tension