Explain how fertilisers are different from manure.

Explanation

### Step-by-Step Solution:

1. **Definition**:
- **Fertilizers**: Fertilizers are man-made chemical substances that are added to the soil to enhance its fertility and increase crop productivity.
- **Manure**: Manure is a natural substance derived from the decomposition of animal excreta, plant waste, and the remains of dead animals and plants.

2. **Origin**:
- **Fertilizers**: They are produced in factories and are synthetic in nature.
...