Questions from Soils and Fertilizers V

Warning: The following questions may be poorly worded and subjective. Exam questions will be worded differently. Exams may also contain questions not listed here.

  1. Name 4 crop characteristics that will affect fertilizer applications
  2. Name 4 soil characteristics that will affect fertilizer applications
  3. Identify the 4 fertilization strategies usually employed
  4. There are at least 3 basic (general) concepts with regard to fertilizer. Name them.
    1. Give a couple of specific concepts to remember
  5. Name and describe the 5 most common fertilizer application operations.
  6. What problems can arise with a broadcast operation under low/no-till?
  7. When would banding fertilizers make sense? (4 reasons)
  8. What guidelines should be followed with regard to 'pop-up' fertilizing. (At least 3)
  9. Name one advantage and one disadvantage of using 'fertigation'
  10. Name the 4 most common physical forms (types) of fertilizer.
    1. With which of the five application operations are each usually used?
  11. Should be able to answer questions similar to:
    1.  We want to make 3 tons of 12-12-12. The carriers that are available are: Ammonium Nitrate (31-0-0), TSP(0-46-0) and Potash (0-0-60).
      1. How much of each carrier will be needed?
      2. How much filler will be needed?
    2. The soil test shows we need 100 lbs/acre of N, 50 lbs/acre of P2O5 and 50 lbs/acre of K2O. We have 20,000 square feet.
      1. How much Urea (45-0-0), TSP (0-46-0) and KCl (0-0-60) will we need per acre.
      2. How much will we need for the 20,000 ft2 ?

    3. Which fertilizer is a cheaper source of N.
      1. NH3NO3 (33-0-0) @$180 per ton or Urea (45-0-0) @ $220 per ton ?

      [Note: The amount to make, the carriers, the soil test amounts, costs, etc  will likely be different]

      4.  

  12. When ordering fertilizer mixture from a dealer, indicate at least 4 pieces of information that you should ask about.
  13. Indicate 3 Factors that will affect the selection of fertilizers
  14. Give two reasons why it would be preferable to use a nitrate-N fertilizer and two reasons why it would be preferable to use an ammoniacal-N fertilizer

  15. Name the 4 components of the water cycle discussed in class
  16. Which 3 soil properties affect Intake
  17. Why does runoff occur?
  18. From where might water evaporate? (3 places)
  19. What are the water resources for crops?
  20. Name and describe 4 methods for measuring water
  21. Define WUE
  22. Indicate the 2 categories for improvement of WUE
  23. How can water capture be improved?
  24. How can water usage be improved?
  25. How much of the US water supply is used in some sort of agricultural enterprise?
  26. List several soil factors that effect water intake
  27. How might leaching be reduced? (2 ways)
  28. How might evaporation be reduced? (A few ways)


  29. How do we know when should irrigation be applied?
  30. How do we determine the amount of water to apply? Steps
    31. involved.
    1. What is wrong with applying too little?
    2. Given WHC and rooting depth, you should be able to calculate irrigation need.
  31. How can irrigation water be saved?
  32. What are common quality problems with irrigation water?
    1. What are some of the problems with excess soluble salts?