Vocab 1

6. the layer of a soil profile immediately below the A horizon, containing deposits of leached material
7. the layer of a soil profile immediately below the B horizon and above the bedrock, composed of weathered rock little affected by soil-forming processes.
8. occurs when the ground gets more water than it can absorb and it washes away
9. a broad-based approach that integrates practices for economic control of pests
10. the layer of unconsolidated rocky material covering bedrock.
11. a substance used for killing insects
16. is a way of growing crops or pasture from year to year without disturbing the soil through tillage
17. a layer generally parallel to the soil crust, whose physical characteristics differ from the layers above and beneath
18. a thing, such as a row of trees or a fence, wall, or screen, that provides shelter or protection from the wind.
20. the uppermost layer of soil containing humus, topsoil, and organic debris
22. the action of clearing a wide area of trees
23. defined as the wearing away of topsoil
24. a chemical that destroys fungus

1. when using this, chemicals can harm both pests and non-pest organisms
2. plowing along the contours of the land in order to minimize soil erosion
3. the process by which water-soluble salts accumulate in the soil
4. a group of chemicals composed of carbon, chlorine, and hydrogen. As pesticides, they are also referred to by several other names, including chlorinated organics, chlorinated insecticides, and chlorinated synthetics.
5. a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.
12. the layer of loose leaves and organic debris at the surface of soil.
13. Triangle: three sided figure that represents increasing or decreasing percentages of sand, silt and clay particles
14. a substance that is toxic to plants and is used to destroy unwanted vegetation
15. make or form (sloping land) into a number of level flat areas resembling a series of steps
19. to saturate with water
21. wear away or change the appearance or texture of (something) by long exposure to the air