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What three states compose soil
Solid, liquid and ORGANIC
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Define humus
Humus - term used to descrive partially decomposed organic matter
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Define Pores in soils
Pores - Spaces between soil particles
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What is contained within soil pores
WATER and AIR
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What can water contain
WAter can contain NUTRIETNS
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What is reposnsible for the transport of material through soils
WATER is responsible for the transport of materials through soils
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Regolith he mentioned it
Old parent material thats on its way to becomign soil
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What soil layer is known as the zone of accumulation of organic debris
LFH layer
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Define the A horizon
A horizon - the mixing layer of mineral and organic matter in soil
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what is known as the zone of primary biological activity?
The A horizon is known as the zone of primary biological activity
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Define B horizon
B horizon - Zone of accumulation of mineral soil and organic material leached from upper horizon
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Define C horizon
C horizon the weatherd parent material
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What generally termed layers are there to the cross section of a forest?
- Vegetation
- Leaf Litter
- Soil
- Regolith
- Bedrock
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How do horizons develop
Horizons develop by the removal or accumulation of ions, colloids or chemical compounds
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What is the word for "true soil"
Solum
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What horizons are considerd to tbe the solum
The A and B horizon
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Define Leaching
Leaching - Seeping water movng soil materials deeper into the ground
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Define eluviation
Eluviation - the downward movement of fine soil particles from the upper horizons (clay and collids)
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Define soil collids
Soil colloids conists of particles smaller than one hundred thousandth of a millimeter (0.000,01 mm)
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What can Soil Colloids be made up of?
Soil colloids cna be both mineral and organic substances
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What are mineral colloids usually derived from
Mineral Colloids are usually from clay minerals
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Are organic colloids usually long lasting?
Organic colloids are usually resistant to decay
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What do clay colloids usually attract therefore what charge are they
Soil colloids are negativly charged and attract positivly charged nutrients
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Name four nutrients that soil colloids are responsible for transfering to plants
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What is ment by peds
Peds the way the soil is grouped together
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Name the 4 types of peds he lists
- Small
- Granular
- Large
- Angular blocky
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What holds peds together
Soil colloids
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What are primary minerals
Compounds present in unaltered rock
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What are secondary minerals
Weather primary minerals
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Give an example of secondary minerals
Clays
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Jst saying Soil mositure time
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Define evapotransperation
Evapotransperation - the combined water loss to the atmosphere by evaportaion and from soil transperation from plants
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Define Ground water recharge
Ground water recharge - Water flowing directly through the soil to aquifers and streams below soil horizons
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