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aggregation
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Horticulture

Horticulture key terms unit 4

TermDefinition
aggregation the clinging together of soil particles to form larger, crumblike particles
biochemical a chemical formed by a living organism
capillary water water held against the force of gravity
dormancy in a resting or non-growing state
field capacity water left after capillary movement stops
gravitational water water that the soil is unable to hold against the force of gravity
loam soil with approximately equal amounts of sand, silt and clay; generally considered the best type of soil for plant growth
limestone a natural rock used to reduce soil acidity
medium a material that is used to start and grow seeds and plants
macroelements major elements of fertilizer: nitrogen, phosphorous, potassium,- NPK
microelements plant nutrients needed in small quantities
perlite a grey-white material of volcanic orgin used to improve aeration of the media
photoperiodism response of plants to different periods of light and darkness in terms of flowering, reproduction cycle, and dormancy
peat moss partially decomposed vegetation that has been preserved underwater
slow-release fertilizers fertilizer that releases plant nutrients over a long period of time
soilless mix contains combinations of perlite, sphagnum moss, peat moss, vermiculite, limestone, tree bark, and slow -release fertilizers
sphagnum moss dehydrated remains of acid bog plants, used in shredded form for starting seeds
transpiration loss of water through the leaves or stems of plants
texture triangle to determine the textural name of a soil
tree bark bark of pine or hardwood trees ground in small pieces
vermiculite a light mineral with neutral pH used to increase the moisture-holding capacity of media
Created by: 3turnshome79
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