Across
- 2. compete with crops for nutrients
- 5. destroy crops by eating them
- 7. example of a biological control
- 8. chlorophyll is needed for this
Down
- 1. helps to increase amount of crops produced
- 3. harmful algae bloom due to fertiliser run off
- 4. to get rid of weeds
- 5. to get rid of pests
- 6. sampling method to estimate abundance
- 9. given out during photosynthesis