ICSE Class 10

General instructions: Answer all questions. Marks are shown in brackets [ ].

Objective

1. 1.
   Which crop is widely cultivated on black soil in India?

   1. A. Rice
   2. B. Cotton
   3. C. Tea
   4. D. Wheat
   [1]
2. 2.
   How is regur soil or black soil primarily formed?

   1. A. From the deposition of river sediments
   2. B. Through the weathering of Deccan trap basalt rock in situ
   3. C. From the accumulation of organic matter in swamps
   4. D. By the action of glaciers during the Ice Age
   [1]
3. 3.
   The term used for soils found at the place of their formation is:

   1. A. Ex-situ
   2. B. In-situ
   3. C. Transported
   4. D. Hill soils
   [1]
4. 4.
   In which of the following regions is plugging of gullies and ravines commonly practised?

   1. A. Ganges Delta and Sundarbans.
   2. B. Chambal Valley and portions of Punjab.
   3. C. Thar Desert and Deccan Plateau.
   4. D. Western Ghats and Eastern Himalayas.
   [1]
5. 5.
   What is soil conservation, and which of the following is NOT a method to reduce soil erosion?

   1. A. Afforestation to anchor soil with vegetation
   2. B. Terracing to control water runoff on slopes
   3. C. Deforestation to clear land for agriculture
   4. D. Strip cropping to alternate crop rows and reduce erosion
   [1]
6. 6.
   How is red soil formed, and which of the following is a reason for its low productivity?

   1. A. Formed by weathering of ancient crystalline rocks; high nitrogen content
   2. B. Formed by weathering of ancient crystalline rocks; nutrient deficiency and low moisture retention
   3. C. Formed by river deposition; excessive clay content
   4. D. Formed by volcanic activity; high organic matter
   [1]
7. 7.
   Name the process of removal of soluble mineral salts, especially the bases and silica from horizon A or the top soil by percolating rain water.

   1. A. Pedogenesis
   2. B. Leaching
   3. C. Lithification
   4. D. Conglomeration
   [1]
8. 8.
   Wind erosion is the most powerful agent of erosion in deserts because of:

   1. A. Absence of population
   2. B. Aridity
   3. C. No vegetation
   4. D. Both (b) and (c)
   [1]
9. 9.
   Which is the most widespread soil of India?

   1. A. Red soil
   2. B. Alluvial soil
   3. C. Laterite soil
   4. D. Black soil
   [1]
10. 10.
    A type of leached soil is:

    1. A. Red
    2. B. Black
    3. C. Alluvial
    4. D. Laterite
    [1]