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Soil Formation

MacKayla Allen

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Across
5.the solid layer of rock beneath the soil
9.the geologic principle that the same geologic processes that operate today, operated in the past to change Earths surface
11.Rich,fertile soil that is made up of about equal parts of clay
12.a measure of how well soil supports plant growth
14.dark-colored organic material in soil
15.soil conservation method in which the deadstalks from the previous years crop are left in the ground to hold the soil in place
16.Plowing fields along the curves of a slope to prevent soil loss
17.the chemical and physical processes that break down rock at Earths surface
18.the process by which water,ice,wind,or gravity move weathered rock or soil
Down
1.the type of weathering in which rocks is physically broken into smaller pieces
2.The grinding away of rock by other rock particles carried in water,ice,or wind
3.the loose,weathered material on earths surface in which plants grow
4.the management of soil to prevent its destruction
6.the processes that breaks down rock through chemical changes
7.Anything in the enviornment that humans use
8.the practice of growing different crops in succession on the same land chiefly to preserve the productive capacity of the soil
10.processes that splits rock when water seeps into cracks, then freezes and expands
13.the layer of soil that differs in color and texture from the layers above or below it

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