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Crop Science Lab 1
Lab 1
29
Agriculture
Undergraduate 2
08/19/2016

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Cards

Term
being a legume, clover benefits plants by doing this
Definition
fixing N
Term
benefits of organic matter on the surface
Definition
-prevents erosion
-suppresses weeds
Term
can soil organic matter act as N pool?
Definition
yes, if we do really good job with soil
Term
clover is in this group of plants
Definition
legumes
Term
dead clover releases this
Definition
N and other nutrients
Term
disadvantage of using tillage equipment to control weeds
Definition
can take out some crops and reduce yield
Term
dispersive
Definition
when soils like to break apart; this describes the soils here
Term
how N fertilization can be bad for the environment
Definition
because it leads to the production of nitrous oxide, which is a far more powerful greenhouse gas than CO2
Term
how clover can drive up cost of production
Definition
by incurring extra cost for water
Term
how to control weeds w/o herbicides
Definition
w/ tillage equipment
Term
no till reduces...
Definition
erosion
Term
organic matter does this to the color of topsoil
Definition
turns it brown
Term
roots from clover do this to soil
Definition
hold soil together
Term
soil falls apart when there's a lack of...
Definition
soil structure
Term
something to worry about in organic operations
Definition
weed population
Term
strategy of living mulch
Definition
-solid stand of clover, then dead rows to plant corn
-herbicides onnly on dead rows
-dead clover releases N and other nutrients
-the only solid runoff from living mulch is organic matter
-living mulch has better environmental consequences because of less sediment runoff
Term
the A horizon
Definition
the topsoil
Term
the B horizon
Definition
compacted clay below the topsoil A horizon
Term
the benefits of soil organic matter regarding water
Definition
-improves water retention
-improves drought resistance
Term
the only solid runoff from living mulch
Definition
organic matter
Term
this happens when there's a lack of soil structure
Definition
soil falls apart
Term
this horizon is compacted clay
Definition
the B horizon
Term
this soil is dispersive
Definition
soil w/o organic matter
Term
tilling the soil disrupts...
Definition
the organic matter
Term
we need to regenerate organic matter to regenerate...
Definition
topsoil
Term
we need to regenerate this to regenerate topsoil
Definition
organic matter
Term
what dead roots contribute
Definition
organic mattter to the topsoil A horizon
Term
why living mulch has better environmental consequences
Definition
less sediment runoff
Term
why tall fescue can be bad
Definition
can harbor some fungus that produces derivitives of LSD
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