Plant science 3

5. a substance that is lacking
6. Degree Units (GDUs): a measurement of the amount of heat needed for a corn plant to reach various stages of growth
8. a dry outer covering of some fruit, seeds, or nuts
9. plant growth: the stage of plant growth where flowers and fruit are formed
12. a softer, usually edible part of a nut, seed, or fruit stone contained within a hard shell
16. any material of natural or synthetic origin that is applied to soils or plant tissues to supply one or more nutrients essential to plant growth
17. a primary agricultural product that can be bought and sold
19. management practices: methods that can improve efficiency, optimize resources, and prevent or help reduce pollution
20. material: relating to living things; made without the use of artificial chemicals
21. the part of the plant that grows into the soil to anchor the plant and collect water and nutrients

1. the flat or needlelike part of a plant where photosynthesis happens
2. manure: vegetation that is plowed into the field to improve soil composition; normally a legume such as beans or alfalfa
3. animal waste used for fertilizing land
4. the female parts of the corn plant which are found in the shoot that will develop into the ear of corn
7. Nutrient Stewardship System: helps farmers apply the right source of nutrients at the right rate, time and place on their fields
10. the male part of a corn plant that emerges from the top of the plant and bears many small flowers that release pollen grains
11. a period of plant growth between germination and flowering
13. the part of a plant stem from which one or more leaves emerge, often forming a slight swelling or knob
14. any material added to soil to make it more productive such as fertilizer or compost
15. a mixture made of decaying organic material used to fertilize plants and amend soils
18. any material of natural or synthetic origin that is applied to soils or plant tissues to supply one or more nutrients essential to plant growth