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Answer:
Q7) a) The absorption capacity of sandy soil is the minimum because it is less fertile.
Q7) b) Clayey soil has very small sized particles. ... For growing crops such as wheat, gram, and paddy, the soil should be good at retaining water and rich in organic matter is suitable. Therefore, clayey soils having these characteristics are useful for such kind of crops.
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Q8) a) Wind. When strong winds blow, the topsoil along with the organic matter is carried away by the wind. ...
Water. When it rains in the hilly areas, the soil gets washed away towards the plains. ...
Q8) b) composition. …and B horizons is the C horizon, a zone of little or no humus accumulation or soil structure development. The C horizon often is composed of unconsolidated parent material from which the A and B horizons have formed.
Qi) c) Afforestation: ...
Checking Overgrazing: ...
Constructing Dams: ...
Changing Agricultural Practices: ...
(i) Crop Rotation: ...
(ii) Strip Cropping: ...
(iii) Use of Early Maturing Varieties:
Explanation:
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Answer:
As the atomic mass of calcium is 40g. so , this 40 g is can be said to be one mole of calcium atom. One mole of any substances contain the number of molecules or atoms equal to 6.022×10^23.