1. The uppermost layer of the Earth is- a. Rock b. Soilc. metal 2. Soil is formed by pieces of- a. Glass. b. Metal c. rocks 3. To form a layer of soil, it takes- .a. thousands of yearsb. two years c. a few minutes 4. The most important quality of soil is its- a. Hardness b. Softnessc. fertility
Fill in the blanks.
1. Soil is made of sand and rocks 2. Alluvial soil is the most fertile type of soil. 3. Black soil is also called black lava soil 4. Red soil is less fertile than alluvial soil. 5. Bricks are made with laterite soil.
Short answer questions.
1. Where do we find alluvial soil in India?
Ans: In India, Alluvial soil is found in the Northern Plains and in the Coastal Plains.
2.Name two crops that are grown in Black soil.
Ans: Cotton and Sugarcane are two crops grown in Black Soil.
3. Where do we find red soil in India?
Ans: In India, Red Soil is found in Karnataka, Tamil Nadu, some parts of Maharashtra, Andhra Pradesh, Madhya Pradesh and Jharkhand.
4. What is the colour and fertility quality of laterite soil?
Ans: Laterite soil is Brown in colour and it is not fertile.
5. Where do we find desert or sandy soil in India?
Ans: In India, Desert or Sandy soil is found in the desert areas of Gujarat and Rajasthan.
Answer the following questions.
1. How is laterite soil used by us?
Ans: We use Laterite soil to grow crops and fruits. We also use this soil to make bricks.
2. How can we grow crops in Sandy soil ?
Ans: We can grow crops in Sandy soil with proper irrigation and manuring.
3. How do chemical fertilizers affect soil? How can we save the soil from them?
Ans: Chemical fertilizers affect the fertility of soil in an adverse manner. We can save the soil from the affect of chemical fertilizers by using natural organic manure made of dead leaves, fruit peels, vegetables and other natural elements.
4. What is soil erosion? How can we prevent it?
Ans: Due to lack of trees when heavy rains and strong winds carry away the upper layer of soil it is called soil erosion. We can prevent soil erosion in the following ways … i) Do not cut trees. Instead take care of them. ii) Plant more and more trees. iii) Prevent overgrazing. iv) Stop using chemical fertilizers.
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