arable land
Land that can be cultivated to grow crops.
Subject:
Environmental Science
Forum reference:
Book page:
http://course-notes.org/Environmental_Science
aquifer
Porous, water-saturated layers of sand, gravel, or bedrock that can yield an economically significant amount of water.
Subject:
aquatic life zone
Marine and freshwater portions of the biosphere. Examples include freshwater life zones (such as lakes and streams) and ocean or marine life zones (such as estuaries, coastlines, coral reefs, and the deep ocean).
Subject:
aquatic
Pertaining to water. Compare terrestrial.
Subject:
Aquaculture
Growing and harvesting of fish and shellfish for human use in freshwater ponds, irrigation ditches, and lakes, or in cages or fenced-in areas of coastal lagoons and estuaries. See fish farming, fish ranching
Subject:
anthropocentric
Human-centered. Compare biocentric.
Subject:
annual
Plant that grows, sets seed, and dies in one growing season. Compare perennial.
Subject:
Animals Eukaryotic
multicelled organisms usually capable of mobility and unable to produce their own food (heterotrophs), such as sponges, jellyfishes, arthropods (insects, shrimp, lobsters), mollusks (snails, clams, oysters, octopuses), fish, amphibians (frogs, toads, salamanders), reptiles (turtles, lizards, alligators, crocodiles, snakes), birds, and mammals (kangaroos, bats, cats, rabbits, elephants, whales, porpoises, monkeys, apes, humans). See carnivores, herbivores, omnivores.
Subject:
animal manure
Dung and urine of animals used as a form of organic fertilizer. Compare green manure.
Subject:
Also used is fermentation.
Compare aerobic respiration.
Subject:
Pages
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