- Crop rotation renews / protects soil
- Renewing soil increases the nutrients in soil
- Hence, crop rotation increases the nutrients in soil

- Crop rotation increases the nutrients in soil
- If something increases something else, then decreasing that something will decrease that something else
- So, decreasing crop rotation will decrease the nutrients in soil

- Crop rotation is a kind of process
- Not doing something that is required for a process decreases the performance of that process
- Hence, not doing something that is required for crop rotation decreases crop rotation

- Not doing something that is required for crop rotation decreases crop rotation
- Crop rotation requires rotating crops from year to year
- Therefore, when crops are not rotated from year to year, crop rotation decreases

- Decreasing crop rotation will decrease the nutrients in soil
- When crops are not rotated from year to year, crop rotation decreases
- So, when crops are not rotated from year to year, the nutrients in soil decrease

- When crops are not rotated from year to year, the nutrients in soil decrease
- If something is decreased then that something is depleted
- Therefore, when crops are not rotated from year to year, the nutrients in soil are depleted

Hence, when crops are not rotated from year to year, the nutrients in soil are depleted
What most likely happens to soil when crops are not rotated from year to year?
- Crop rotation renews / protects soil 
- Crop rotation is a kind of process 
- If something is decreased then that something is depleted 
- Renewing soil increases the nutrients in soil 
- Not doing something that is required for a process decreases the performance of that process 
- If something increases something else, then decreasing that something will decrease that something else 
- Crop rotation requires rotating crops from year to year