Agriculture 5

4. Collecting and storing plant material so it can decay and be added to soil to improve its quality
6. Dark earth made of organic material such as decayed leaves and plants
7. Such a land that can produce a large number of good quality crops
10. ... up - to gather together by adding to the same place
11. To become gradually damaged, worse, or less

1. A small, thin part of a tree or a bush that is removed from a tree and is without leaves
2. The part of a plant that grows down into the earth to get water and food and holds the plant firm in the ground
3. An illness of people, animals, plants
4. To break, or cause something to break, into small pieces
5. A chemical element that is a gas with no colour or taste, it forms most of the earth's atmosphere, and is a part of all living things
8. ... litter - all the fallen leaves on the ground
9. To combine things together
11. To fall into separate elements (a synonym of ‘to decay’)