Unit 8 Vocab

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Across
  1. 2. alternating strips of row crops with strips of close-growing crops.
  2. 6. water that drains out of soil after it has been wetted.
  3. 7. addition of water to plants to supplement that provided by rain or snow.
  4. 10. strip of grass growing in the low area of a field where water can gather and cause erosion.
  5. 11. water that drains out of soil after it has been wetted.
  6. 12. wearing away.
  7. 15. level below which soil is saturated or filled with water.
  8. 16. material placed on soil to break the fall of raindrops (preventing erosion), prevent weeds from growing, or improve the appearance of the area.
  9. 18. interdependence of plants or animals on each other for food.
  10. 20. techniques of soil preparation, planting, and cultivation that disturb the soil the least and leave the maximum amount of plant residue on the surface.
  11. 22. material that reduces the acid content of soil and supplies nutrients such as calcium and magnesium to improve plant growth.
  12. 24. material that supplies nutrients for plants.
  13. 25. water that is held too tightly by soil particles for plant roots to absorb.
  14. 26. water that flows from the land to oceans and contains little or no salt.
Down
  1. 1. removal of soil from broad areas of the land.
  2. 3. level line around a hill.
  3. 4. planting of different crops in a given field every year or every several years.
  4. 5. operations such as plowing, disking, planting, cultivating, and harvesting across the slope and on the level.
  5. 8. movement of water to surface, to atmosphere, to surface.
  6. 9. a large land area from which water flows or from which it is absorbed from rain or melting snow, and from which water drains as it emerges from springs and moves into the streams, rivers, ponds, and lakes.
  7. 13. water held by soil particles and available for plant use.
  8. 14. soil or wall structure built across the slope to capture water and move it safely to areas where it will not cause erosion.
  9. 17. seed is planted directly into the residue of the previous crop, without exposing the soil surface.
  10. 19. drinkable, that is, free of harmful chemicals and organisms.
  11. 21. water-bearing rock formation.
  12. 23. water that flows up the mouth of a river as the ocean tide rises and comes in.