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APES chapter 9 soil&agriculture

Terms in this set (30)

agriculture
The art and science of producing food from the land and tending livestock for the purpose of human consumption.
bedrock
The solid layer of rock beneath the soil
clay
the finest soil, made up of particles that are less than 0.002 mm in diameter.
conservation districts
A district established to provide
conservation reserve program
10 to 15 year contracts for land removed from production
conservation tillage
An umbrella term for any farming method that reduces the number of time that a field must be disturbed.
contour farming
Plowing and planting across the changing slope of land, rather than in straight lines, to help retain water and reduce soil erosion.
crop rotation
The practice of rotating use of different fields from crop to crop each year to avoid exhausting the soil.
cropland
land used to raise plants for human use
desertification
Degradation of land, especially in semiarid areas, primarily because of human actions like excessive crop planting, animal grazing, and tree cutting.
dust bowl
Region of the Great Plains that experienced a drought in 1930 lasting for a decade, leaving many farmers without work or substantial wages.
erosion
Processes by which rock, sand, and soil are broken down and carried away (i.e. weathering, glaciation)
fertilizer
a chemical that provides nutrients to help crops grow better.
green revolution
Agricultural revolution that increased production through improved seeds, fertilizers, and irrigation; helped to support rising Asian populations.
horizon
Going straight across from side to side
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