Question

Name the two types of substances which are added to fields by farmers to maintain the fertility of the soil.

Answer 1

1. Two types of substances are added to fields by farmers to maintain the fertility of the soil-Manures and fertilizers.
2. Manures are decomposed organic materials added to the soil to increase the fertility of soil and productivity of crops. They contain most of the essential nutrients required by the plants.
3. The nutrient-rich substances that are added to the soil to increase its fertility are known as fertilizers. Some common fertilizers are urea, potash and phosphates.