Agriscience, Unit 18 worksheet

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

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

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

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

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

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

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

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

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

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

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

12. Most plants require a pH somewhere between:

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

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

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

16. Soil pH generally is raised by adding:

17. Soil pH affects the availability of:

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

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

20. Most nutrients are absorbed in solution as:

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

22. What type of fertilizer is animal manure?

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