Across
- 5. removing excess water from the fields
- 7. e.g.mice, bacteria, snails, insects
- 9. removing some branches from fruit trees to increase yield
- 10. a chemical used for killing weeds
- 13. a tool for collecting leaves or hay on the ground
- 14. unwanted plants that compete with cultivated plants
- 15. important nutrient that can be found in broccoli
- 16. e.g. potato is high in this substance
- 17. important substance in the soil which has to be replaced
Down
- 1. making the soil fine,breaking up clods of soil
- 2. '...use of chemicals can damage the soil and the water.'
- 3. removing some plants to avoid overcrowded rows
- 4. organic manure or some kind of chemical with nutrients
- 6. a small part of a plant responsible for reproduction
- 8. providing water for plants in arid seasons
- 9. one of the most important nutrients for plants
- 11. too much, unnecessary amount
- 12. planting too many seedlings on a small area