Plant science 3

3. methods that can improve efficiency, optimize resources, and prevent or help reduce pollution
5. the part of the plant that grows into the soil to anchor the plant and collect water and nutrients
8. a primary agricultural product that can be bought and sold
10. vegetation that is plowed into the field to improve soil composition; normally a legume such as beans or alfalfa
11. relating to living things; made without the use of artificial chemicals
13. 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
18. helps farmers apply the right source of nutrients at the right rate, time and place on their fields
21. a substance that is lacking

1. the stage of plant growth where flowers and fruit are formed
2. the male part of a corn plant that emerges from the top of the plant and bears many small flowers that release pollen grains
4. a measurement of the amount of heat needed for a corn plant to reach various stages of growth
6. 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
7. the part of a plant stem from which one or more leaves emerge, often forming a slight swelling or knob
9. a softer, usually edible part of a nut, seed, or fruit stone contained within a hard shell
12. a mixture made of decaying organic material used to fertilize plants and amend soils
14. the female parts of the corn plant which are found in the shoot that will develop into the ear of corn
15. a dry outer covering of some fruit, seeds, or nuts
16. the flat or needlelike part of a plant where photosynthesis happens
17. a period of plant growth between germination and flowering
19. animal waste used for fertilizing land
20. any material added to soil to make it more productive such as fertilizer or compost