| A | B |
|---|
| natural resource | Anything naturally occurring in the environment that humans use. |
| soil conservation | The management of soil to limit its destruction. |
| crop rotation | The planting of different crops in a field each year to maintain the soil's fertility. |
| contour plowing | Plowing fields along the curves of a slope to prevent soil loss. |
| conservation plowing | Soil conservation method in which weeds and dead stalks from the previous year's crop are plowed into the ground. |
| Dust Bowl | Due to drought and farmers plowing this occurred in the 1930s. |
| value | The ________ of soil is reduced when soil loses its fertility or when topsoil is lost due to erosion. |
| conserved | Soil can be __________ through practices such as contour plowing, conservation plowing, and crop rotation. |
