8. If a farmer plants the same crop in a field year after year, the soil becomes less fertile. What (1 point)
causes this decrease in fertility?
erosion
lack of water
loss of topsoil
loss of nutrients

loss of nutrients

Explanation:

1. Loss of top soil by erosion

2. Nutrient mining

3. Physical degradation of soil (poor structure, compaction, crusting and waterlogging etc.

4. Decrease in organic matter content and soil bioactivity

5. Loss of nutrients through various routes

Modern agriculture had used up the nutrients in our soil and now our food supply was suffering.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.