The presence of iron in a soil may give it a yellow or red color from iron oxides.
Correct Answer:
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Q21: Higher organic matter content in the soil
Q22: When soil is eroded from farmland,
A) The
Q23: The process of planting alternating bands of
Q24: Soil erosion from farmland can be reduced
Q25: Degradation of soil fertility has no effect
Q27: Chemical and mechanical weathering are two processes,unrelated
Q28: In areas with adequate rainfall,such as the
Q29: Abundant water promotes chemical weathering because most
Q30: Terracing of farmland
A) Is a very new
Q31: The finer rock fragments are,the more subject
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