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Soil (Std 7th)
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Name the four factors that affect soil formation.
1. Parent Rock, 2. Regional Climate, 3. Biotic Material 4. Time
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Soil formation is a very ____ process.
slow
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What all can be used to maintain the pH balance of soil?
vermicompost, organic manures compost (VOC)
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____________ of the parent rock is the first process in soil formation.
Weathering
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Which soil is found the most in Maharashtra?
Black soil
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When soil quality gets lowered due to certain reasons, it is called _________
Soil degradation
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_______ soil is not very useful for agriculture.
Yellow brown
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If the _____ of the soil gets disturbed, it is a sign of soil degradation.
pH
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Black soil is also called _______ soil
Regur
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If the proportion of __________ in soil is greater, the soil becomes fertile.
humus
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