| A | B |
| environment | the surroundings in which people, plants, or animals live |
| food processing | turning crops and livestock into different food products |
| fuel | a substance burned as a source of heat and power |
| irrigation | the use of ditches or pipes to bring water to fields |
| mineral | a nonrenewable resource that is found in the ground |
| aquifer | a layer of rocks and gravel that traps water underground |
| livestock | farm animals such as hogs, cows, and chickens |
| population | the number of people who live in a place or area |
| economy | the way a country or other place produces and uses natural resources, goods, and services |
| fertilizer | the chemicals and manure farmers add to soil to make it richer |
| renewable resource | resources that can be replaced |
| nonrenewable resource | resources that cannot be replaced |
| growing season | the time period of 140 to 200 days in which crops will not freeze |
| conservation | the careful use of our natural resources |
| agriculture | the business of growing crops and raising animals |
| examples of minerals | gravel and iron ore |
| our most important resource | people |
| natural resource | something found in nature that people use |
| most of Ohio's farmland is here | Interior Plains |