1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Soil horizons Farming Techniques Erosion Soil Particles Miscellaneous Soil

2. Made up of partially decomposed matter that helps the soil retain moisture

3. What is humus?

4. In Florida this is the main component of our bedrock.

5. What is limestone?

6. This layer contains mostly freshly fallen material

7. What is the surface litter layer or O horizon?

8. This layer is generally the extent of the roots’ growth

9. What is the top soil or A horizon?

10. This layer is mostly composed of decomposed or partially decomposed matter, rich in nutrients.

11. What is the A horizon or topsoil?

12. This is the farmer’s preferred type of soil.

13. What is loam?

14. This technique is used on steep slopes and creates small steps on which crops are planted.

15. What is terracing?

16. This is the method of farming most commonly used by US farmers in the past.

17. What is conventional tillage?

18. When this is removed, erosion is likely to increase.

19. What is vegetation?

20. This farming technique utilizes trees as a windbreak between other rows of plants.

21. What is alley cropping?

22. This is the number one agent of soil erosion.

23. What is water?

24. The amount of time for an inch of topsoil to form?

25. What is between 200 to 1000 years?

26. These are the two continents that have experienced the greatest amount of soil erosion over the last eentury.

27. What are Africa and Asia?

28. This happens to soil when it has been compressed as a result of heavy vehicles or cattle.

29. What is soil compaction?

30. This is what must be done to reduce soil salinization on a plot of land.

31. What is use large amounts of water to flush away the salt?

32. This is the smallest of the particle sizes.

33. What is clay?

34. This type of soil is prone to the greatest amounts of leaching?

35. What is sand?

36. This type of soil contains the greatest amounts of nutrients.

37. What is clay?

38. This type of soil has the greatest permeability.

39. What is sand?

40. This type of soil is most likely to have poor aeration (air) for the roots of the plants

41. What is clay?

42. This measures the concentration of hydrogen ions in the soil.

43. What is pH?

44. If the pH of soil is 2, it is this much more acidic than one with a pH of 5.

45. What is 1000 times?

46. This is often the result of soil that is too acidic.

47. What is decrease in nutrient availability for plants?

48. This is used to make acidic soil less so.

49. What is lime?

50. This is added to soil to make it less alkaline.

51. What is sulfur?