Soil

Soil

1. What is soil?

   • Is the process of weathering and erosion kicked into gear weathering is the breaking of rocks into smaller rocks either by a physical or a chemical process and erosion is when these smaller rocks are carried away from the bigger parent rocks usually by wind or water depending on the size of the weathered rock it can either be considered a clay a silt or a sand

2. sizes

   • - Clay: 0.002mm - Silt: 0.05 mm -Sand : 2.0 mm
     • Depending on the ratio of these three different sizes of particles the soil will have different properties there's this nifty graph to help figure out wha you have based on the soils composition

3. Horizons

   • is the O horizon ,O for organic and this is where most of the dead plant matter called detritus is
   • Then there's the A horizon that's where the real surface soil is it's sometimes called the bio mantle because this is also where most soil organisms reside
   • The B is the subsurface and usually is the farthest plant roots will go for soil
   • The C horizon is where the bedrock is slowly degrading into soil so it's mostly large rocks and gravel with some soil in between then
   • Then the R horizon, R for rock it's just rock
   • Sometimes if there's a lot of soil leaching and eve horizon will develop this is where sand and silt are deposited while clay will continue further down into the B horizon forming a thin light layer between the A and the B

4. Soil orders

5. CLORPT

   • In soil science there's a common acronym CLORPT that's used to remember the factors that influence soil formation

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