General Crop Science Terminology

1. allowing land to lie idle during a growing season to build up the soil moisture content for the following year
3. a crop grown and plowed under while still green to add organic matter and nitrogen in the soil
5. a grass that is grown primarily for its seed which is used for feed or food
9. soil improving plant which makes nitrogen from the air available to plants
10. land which is capable in its present condition of producing crops requiring tillage
11. science of crop production and soil management
13. rate at which seeds are released from a planter
14. a plant which completes its life cycle in two years-vegetative features in the first year, reproductive features in the second year
15. vegetative material in a fresh, dried or ensiled state which is fed to livestock

2. a plant that begins growth from seed in the fall, completes its life cycle and dies during the next year
4. number of consecutive days from the last killing frost in the spring until the first killing frost in the fall
6. a means of measuring time to maturity based upon heat units rather than days, weeks or months
7. mechanical manipulation of soil conditions for crop production
8. amount of crop produced in response to cultural practices
11. a plant which grows from seed and completes its life cycle and dies during the same year
12. a plant which lives for more than two years