Climate, Soils & Vegetation
- Soil Formation - contains
organic and inorganic material.
How soil is made
- Water-Carrying Capacity of Soil
- geologic factor -
influences the depth, texture, drainage and
nutrient content of a soil.
- biologic factor -
living and dead plants and animals
- chronological factor:
length of time the preceding four factors have been interacting.
- Soil Profiles & Horizons -
soils develop layers that differ in their structure, texture, color.
Generalized soil profiles found in five major ecosystems
- Soil Properties: minerals,
organic matter, water and air interact to produce distinctive soils.
- texture: size of
mineral matter and is determined by proportions of sand, silt
and clay. The best agricultural soils are called loams and
consist of about 40% sand, 40% silt and 20% clay. (Loam