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Sunday, January 26, 2014

Chapter no- 9 SOIL




One word

Q- What does the natural process of soil formation from rocks called?
A - Weathering

Q- Decomposed matter formed by the decay of biodegradable matter by microorganisms is called?
A-    Humus

Q- Water held by soil particles is called?
A-    Capillary water

Q-Mixture of sand,clay,humus forming soil is called?
A-    Loam

Q- Soil is formed by the breaking of rocks in nature due to?
A-    Weathering

Q-Topmost layer of soil is called?
A-    A horizon

Q- Soil which cannot hold much water is?
A-    Sandy soil

Q- Soil which can hold much water is?
Or
Q- Water capacity is high in which soil?
A-    Clay

Q- What kind of soil is suitable for rice crop?
A-    Clayey soil

Other important questions

Q- Name the components of soil?
1.     Rock and soil particles of different kinds and sizes
2.     Variety of mineral salts present in the soil
3.     Soil water
4.     Soil air
5.     Soil organisms-microbes, worms, insects etc.
6.     Humus

Q- Name three horizons of soil?
1.     A horizon
2.     B horizon
3.     C horizon


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