Second Grade Soils « Flashcards at Hudson.edu

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soil	a mixture of organic and inorganic matter, water, and air
inorganic matter	rocks that have disintegrated into tiny particles of sand, silt, or clay
organic matter	decomposing plant and animal remains
humus	the darkest part of the soil; dead plant and animal remains and castings
sand	tiny, loose grains of crushed rock
clay	a very fine part of soil that holds great amounts of water
silt	matter found in soil; it is finer then sand but courser then clay
gravel	small, pebble-sized particles of rock
loam	a mixture of sand, silt, clay, and humus that is excellent for growing plans
compost	a soft, dark, nutrient-rich mixture of humus and soil