Unit 8 Water and Soil Conservation

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