Card Set Information
Class Soil Plant Growth
Class 1 Soil and Plant Growth
The physical condition of the soil as it relates to the ease of tillage, fitness as a seedbed, seedling emergence and root penetraion.
Size of soil particles. Impacts root anchorage. Smaller root systems in compact soil.
PH aka Soil Reaction
Measure of acidity or alkalinity in soil
Measure of the soils resistance to change
Charged particles in soil
Positively charged ions
Cations Exchange Capacity
Soil feritility is determined by the soils ability to hold charged ions.
Space between soil particles
Large spaces between soil particles; hold air
Small spaces between soil particles; hold water
Microscopic roundworms that can be beneficial or harmful
Area of highest biological activity, normally found close to the root system
"Fungus root" has a symbiotic (mutually beneficial) relationship with the roots
Macropores are filled with water
Water that drains away from macropores under the forces of gravity
Water content held in soil after excess water has drained away
Permanent Wilting Point
No usable water is available from the soil
Rate at which water moves through the soil