题目内容
About fifty percent of the total volume of a good quality soil consists of pore spaces.
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Quartz is less resistant to chemical weathering than feldspar.
Oxidation is an important mechanism in decomposing such ferromagnesian minerals as olivine, pyroxene, and hornblende.
Biological activity has little influence on the process of weathering
Frost wedging is most effective in the polar latitudes.
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