A
Event in history led to change in farming practices due to the loss of soil.
Dust Bowl
The number of soil texture classes.
12
The three soil particles.
sand, silt, clay
The removal of the top layer of soil.
Erosion
Two things you can test your soil for.
pH and nutrients
The five factors of soil formation.
parent material, climate, biological factors, topography, and time
The four things soil is composed of.
organic material, non-organic material, air and water
Part of the plant absorbs water and nutrients from the soil.
roots
Two factors that cause erosion.
wind and water
The larger the soil particle size, the (faster or slower) the water flows through.
faster
sand
Soil particle that ranges in size from .05 to .002 mm
silt
The preferred soil to grow crops in.
Soil particle that is smaller than .002 mm
clay
Another word for organic material.
Humus
The bottom layer of a soil profile that is NOT a soil horizon.
R, bedrock
Name one erosion management practice.
crop rotation, cover crops, rotational grazing, no-tillage
Downward movement of materials through soil.
Eluviation.
Three important nutrients in the soil for plants to use.
N-P-K: nitrogen, phosphorus, and potassium
Name two common soil additives.
fertilizer, compost, livestock manure, agricultural lime, wood ash, specific minerals
Blueberries grow best in soil that is _____. (strong/medium/slight acidic/alkaline)
strongly acidic
Using the soil texture triangle, what soil class is 40-40-20.
Loam
Why is soil important?
foundation of agriculture/our world
The five different soil horizons
O, A, E, B, and C
Draw a soil food web.
*ag teacher