Shared Flashcard Set

Details

Soil Science (SENS 100)
Soil Science basics - fertilizers, pH, NPK, etc
29
Agriculture
Undergraduate 2
02/15/2012

Additional Agriculture Flashcards

 


 

Cards

Term
P
Definition
Phosphorus
Term
K
Definition
Potassium
Term
5 soil-forming factors (CORPT)
Definition
Climake, Organisms, Releif (topography), Parent Material (the underlying geography), Time.
Term
Particle size classes
Definition
sand, silt, clay
Term
Sand-sized particles are mostly grains of
Definition
Silica
Term
____-sized particles are uncommon in soil, except in glaciated regions
Definition
Silt
Term
What about silt-sized soil particles makes it more fertile?
Definition
high percentage of easily weatherable materials 
Term
What's the most chemically active fraction of the soil?
Definition
Clay-sized particles
Term
What sized soil particles are mainly secondary minerals formed from teh weathering of the original materials
Definition
Clay-sized particles
Term
Loam
Definition
term that indicates the worability or tilth of a soil
Term
Soil horizons
Definition
Soil layers
Term
Major soil horizons OABCR
Definition
O = Organic matter - partially decomposed litter; A = top soil; B = subsoil; C = partly parent material, few roots; R = unweathered or slightly weathered bedrock
Term
Humus
Definition
decomp products of plant and animal remains that gives topsoil it's brown color
Term
increases the water holding capacity of the soil and provides slowly available pool of nutrient nitrogen, comprising 2-5% of humus by weight
Definition
soil organic matter
Term
clay-sized minerals and soil organic matter have what kind of charge?
Definition
Negative
Term
CEC = cation exchange capacity
Definition
soils ability to retain cations
Term
N2
Definition
gaseous nitrogen
Term
Is N2 available to plants?
Definition
No
Term
N2 makes us how much of the atmosphere?
Definition
80%
Supporting users have an ad free experience!