| A | B |
|---|
| potable water | drinkable water free from harmful chemicals and organisms |
| conservation tillage | techniques of soil preparation,planting and cultivation that disturbs the soil the least and leaves the maximum amount of plant residue on the surface |
| universal solvent | material that dissolves or otherwise changes most other materials |
| no-till | planting crops without plowing or disking the soil |
| contour farming | conducting all operations such as plowing disking planting cultivating and harvesting across the slope and on the level |
| fresh water | water that flows from the land to oceans and contains little or no salt |
| gully erosion | soil removal that leaves trenches |
| aquifer | water bearing rock formation |
| conservation plan | plan developed by soil and water conservation specialists to use land for its maximum production and water conservation without unacceptable damage to the land |
| erosion | wearing away of soil by wind or water |
| tidewater | water that flows up the mouth of a river as the ocean tide rises or comes in |
| mulch | material placed on soil to break the fall of raindrops, prevent weeds from growing, and improve the appearance of the area |
| dust bowl | 1930's wind eroded soil area |
| water cycle | cycling of water between the water sources, atmosphere and surface areas |
| cover crop | close growing crop planted to temporarily protect the soil |
| water table | level below which soil is saturated or filled with water |
| grass waterway | strip of grass growing in the low area of a field where water can gather and cause erosion |
| crop rotation | planting of different crops in a given field every year or every several years |
