Fundamentals of Physical Geography

With reference to agricultural soils, consider the following statements:

1. 1.A high content of organic matter in soil drastically reduces its water holding capacity.
2. 2.Soil does not play any role in the sulphur cycle.
3. 3.Irrigation over a period of time can contribute to the salinization of some agricultural lands.

Which of the statements given above is/are correct?

1. (a)1 and 2 only
2. (b)3 only
3. (c)1 and 3 only
4. (d)1, 2 and 3

In the nature, which of the following is/are most likely to be found surviving on a surface without soil?

1. 1.Fern
2. 2.Lichen
3. 3.Moss
4. 4.Mushroom

Select the correct answer using the code given below.

1. (a)1 and 4 only
2. (b)2 only
3. (c)2 and 3
4. (d)1, 3 and 4

Which of the following are nitrogen-fixing plants?

1. 1.Alfalfa
2. 2.Amaranth
3. 3.Chickpea
4. 4.Clover
5. 5.Purslane (Kulfa)
6. 6.Spinach

Select the correct answer using the code given below:

1. (a)1, 3 and 4 only
2. (b)1, 3, 5 and 6 only
3. (c)2, 4, 5 and 6 only
4. (d)1, 2, 4, 5 and 6

Consider the following statements:

Statement–I:

The soil in tropical rain forests is rich in nutrients.

Statement–II:

The high temperature and moisture of tropical rain forests cause dead organic matter in the soil to decompose quickly.

Which one of the following is correct in respect of the above statements?

1. (a)Both Statement–I and Statement–II are correct and Statement–II is the correct explanation for Statement–I
2. (b)Both Statement–I and Statement–II are correct and Statement–II is not the correct explanation for Statement–I
3. (c)Statement–I is correct but Statement–II is incorrect
4. (d)Statement–I is incorrect but Statement–II is correct

Consider the following statements:

Statement-I:

Rainfall is one of the reasons for weathering of rocks.

Statement-II:

Rain water contains carbon dioxide in solution.

Statement-III:

Rain water contains atmospheric oxygen.

Which one of the following is correct in respect of the above statements?

1. (a)Both Statement-II and Statement-III are correct and both of them explain Statement-I
2. (b)Both Statement-II and Statement-III are correct, but only one of them explains Statement-I
3. (c)Only one of the Statements II and III is correct and that explains Statement-I
4. (d)Neither Statement-II nor Statement-III is correct