Soil erosion is a serious environmental problem. Steps should be taken to curb this problem. Following are some ways to prevent soil erosion:

1. Plant trees on barren lands to prevent soil erosion.

2. Add mulch and rocks to trap plants and grass beneath to prevent soil erosion.

3. Mulch matting can be used to reduce erosion on slopes.

4. Place a series of fiber logs to prevent any water or soil from flowing away.

5. A wall at the base of a slope can help prevent soil erosion.

6. Every house should have proper drainage system so that water can flow into proper water collection systems.

Rajasthan accounts for 16.27% making it the second largest state in groundnut production in India.

1. According to the globe, India is located in northern latitude and eastern longitude. (Northern Hemisphere and Eastern longitude)

2. Rajasthan state is located from 23°03′ north latitude to 30°12′ north latitude and from 69°30′ east longitude to 78°17′ east longitude.

1. Walara agriculture is a type of shifting agriculture, in which land is used for a few years and later abandoned due to lack of fertility and diseases in the soil. This agriculture is done by primitive tribes.

2. Banswara, Udaipur and Dungarpur districts of Rajasthan are inhabited by primitive tribes. Walara agriculture is practiced in these districts.

All statements are true.

Statement A- Sambhar is the largest salt water lake of Rajasthan. 

Statement R- Sambhar lake is located between 74° to 75°E longitudes.