FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If the amount of mineral matter is 43% and the water is 7%, how much the availability of organic matter and the soil Air present in the soil sample?
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25% and 25% respectively
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43% and 7% respectively
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7% and 43% respectively
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50% and 50% respectively
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Explanation:
Detailed explanation-1: -Correct: Granular structure and increased organic matter in a mineral (sand, silt, clay) layer is a good indication of an A horizon.
Detailed explanation-2: -Soil organic matter is estimated by multiplying soil C by 1.72 (Walkley-Black C x 1.72 = OM). Large amounts of manganese or carbonates in soils may interfere with C results from this method. Pretreatment of soil with 0.1N HCl can remove carbonates and manganese.
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