field capacity
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% of water that remains once water has drained due to gravitational flow;
Macropores are filled with air not water; matric potential -10 to -30 kPa;
optimal state for microbes and plants as well as tillage
,an organism that can only get carbon and energy from organic compounds?
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Heterotroph such as bacteria, fungi, protozoa, etc.
what is the USLE (universal soil loss equation)?
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A=RKLSCP
A = annual soil loss
• R = rainfall
• K = erodability
• L = slope length
• S = slope steepness
• C = crop cover
• P = practices to prevent erosion
Prime conditions for high microbial activity
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, -Carbon availability
-quality C:N
-oxygen availability (greatest zone of activity is top 5 cm of soil bc good
balance of O and H20
-Good temperature is 20C-40C
-High calcium and neutral pH soils
-bacterial diversity increases with soil pH (acidic to alkaline soils)
SOM chemically affects
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Cation exchange capacity, water holding capacity, nutrients (reservoir of
slow N)
Saturation
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when ALL soil pores are filled with water; maximum water before
ponding/flooding; matric potential is near 0 kPa; water movement is
primarily due to gravitational potential
mycorrhizal fungi
Give this one a try later!
Give this one a try later!
% of water that remains once water has drained due to gravitational flow;
Macropores are filled with air not water; matric potential -10 to -30 kPa;
optimal state for microbes and plants as well as tillage
,an organism that can only get carbon and energy from organic compounds?
Give this one a try later!
Heterotroph such as bacteria, fungi, protozoa, etc.
what is the USLE (universal soil loss equation)?
Give this one a try later!
A=RKLSCP
A = annual soil loss
• R = rainfall
• K = erodability
• L = slope length
• S = slope steepness
• C = crop cover
• P = practices to prevent erosion
Prime conditions for high microbial activity
Give this one a try later!
, -Carbon availability
-quality C:N
-oxygen availability (greatest zone of activity is top 5 cm of soil bc good
balance of O and H20
-Good temperature is 20C-40C
-High calcium and neutral pH soils
-bacterial diversity increases with soil pH (acidic to alkaline soils)
SOM chemically affects
Give this one a try later!
Cation exchange capacity, water holding capacity, nutrients (reservoir of
slow N)
Saturation
Give this one a try later!
when ALL soil pores are filled with water; maximum water before
ponding/flooding; matric potential is near 0 kPa; water movement is
primarily due to gravitational potential
mycorrhizal fungi
Give this one a try later!
