Name:______Date:______

Fertilizer Questions

Page 149-156

  1. A ______is a material that adds nutrients to a soil.
  2. What 2 parts of the plants can absorb nutrients?
  3. What are the 3 forms a fertilizer can be in?
  4. ______is wasted if the wrong fertilizer is used!
  5. What happens if TOO MUCH fertilizer is used?
  6. What is the difference in a complete and an elemental fertilizer?
  7. What are the 3 nutrients that are in a complete fertilizer?
  8. An ______fertilizers lacks one of the three nutrients.
  9. The ______ingredient is the carrier or the filler.
  10. A fertilizer ______is the active ingredients in a commercial fertilizer formulation.
  11. The 3 numbers on a fertilizer bag (for example 16-4-8), tell you the ______of each nutrient – nitrogen, phosphorus & potassium, in that order.
  12. If you buy a bag of fertilizer that says 13-10-13, what percentage of the total is Nitrogen (remember N-P-K!).
  13. What 2 micronutrients are most often deficient in crops?
  14. Some fertilizers change the ____ of the soil.
  15. If you use ammonium nitrate for a long time and the pH becomes low, what can be added to increase (LIFT) the pH?
  16. ______is the downward pull of nutrients through the soil by water.
  17. Fertilizer should be applied using a method that does not lead to ______.
  18. ______is the type of fertilizer application that spreads fertilizer over an entire area.
  19. ______is used when adding soluble fertilizer into a watering system such as a greenhouse irrigation line.
  20. Name 3 things that determine the amount of fertilizer that needs to be added to a soil.
  21. Follow the sample on page 154 to answer this:

You are a homeowner trying to save some money and fertilize your lawn. Your yard is 12,000 sq ft. You buy a fertilizer at Lowes that says 10-19-10 on it. Your soil test report says that you need 1 pound of nitrogen per 1000 sq ft. How many pounds of the fertilizer will you need?

  1. Fertilizer comes in 3 forms:

______= small pellets that dissolve into soil over a period of time

______= liquid fertilizers that begin as powders and are dissolved in water (like Koolaid)

______= form that is least common and rarely used now for safety reasons

  1. What type of fertilizer would cow manure be?
  2. What type of fertilizer would you purchase in a bag from a garden center?
  1. How many pounds of actual nitrogen would be in 1 ton of 8-8-8 fertilizer? Show how you worked this out.
  1. You buy a 70 lb. bag of fertilizer that is a 20-10-6 analysis. How many pounds of each nutrient do you have? List the 3 nutrients and the number of pounds. Show how you worked this out.
  1. Your lawn is 4000 sq. ft. Your soil test report shows that you need 2 lbs of nitrogen per 1000 sq. ft. Your fertilizer is a 20-12-18 analysis. How many pounds of this fertilizer do you need to meet the needed nitrogen amount?