1. Agriscience, Unit 18 worksheet

3. What happens when fertilizer is added to the soil for plant use?

6. 2. An 80-lb bag of 10-10-12 contains how lbs each of nitrogen, phosphorus, and potassium:

8. 3. Organic fertilizers made from dried and pulverized manure are:

10. 4. Which plant growing media is a volcanic ash material?

12. 5. What is the general term given to anything added to a soil to provide additional organic matter, specific nutrients or modify soil phs?

14. 6. The availability and type of basic chemical elements in the plant is called:

16. 7. The fertilizer application used on row crops where the fertilizer is placed in bands about 8 inches from the row is known as:

18. 8. Hydroponically grown plants differ principally from soil-grown plants in that they require what type of support:

20. 9. The measure of the degree of acidity (sourness) and alkalinity ( sweetness) of soil is called:

22. 10. What is a characteristic of water that can affect the growth of a plant?

24. 11. Warm season vegetables and most flowers grow best in temperatures between:

26. 12. Most plants require a pH somewhere between:

28. 13. Nutrients needed in relatively large amounts by plants are called:

30. 14. Yellowing of the leaves of a plant caused by lacking of nitrogen is called:

32. 15. The three primary nutrients supplied in a complete fertilizer are:

34. 16. Soil pH generally is raised by adding:

36. 17. Soil pH affects the availability of:

38. 18. What is applied to lower the pH value of soil?

40. 19. List five examples of a plant growing media is:

44. 20. Most nutrients are absorbed in solution as:

46. 21. What form must most nutrients become before they can be absorbed by a plant?

48. 22. What type of fertilizer is animal manure?

50. 23. Which plant growing media is a mineral mica-type material