CCA Exam part III

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Author:
MRK
ID:
294252
Filename:
CCA Exam part III
Updated:
2015-02-02 11:59:48
Tags:
nutrient fertility
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  1. Chlorine
    • Cl-
    • immoble
    • micro
  2. P
    • moblie
    • macro
    • structural role in lipid bilayer
    • in ATP
  3. K
    • moblie
    • macro
    • stomata regulation
  4. N
    • moblie
    • macro
    • amino acids
  5. Sulfur
    • macro
    • moble
    • charge balence and nitrogenaous enzyme
  6. Calcium
    • macro
    • immoble
  7. Magnesium
    • moble
    • macro
  8. micros immoble or moble
    immoble
  9. how does
    Chelated formulations of fertilizer affect loss and avaliblity
    keeps micronutirents from being oxidized or immoblized in the soil
  10. Anhydrous anaylsis
    82-0-0
  11. Urea anaylisis
    45-0-0
  12. ammonium nitrate
    33.5-0-0
  13. urea-ammonium nitrate solution
    28 or 32-0-0
  14. ammonium sulfate
    21-0-0
  15. triple superphosphate
    0-46-0
  16. monoammonium phosphate
    11-52-0
  17. diammonium phosphate
    18-46-0
  18. ammonium polyphosphate
    10-34-0
  19. potassium chloride
    • solid
    • 0-0-60
  20. Potassium sulfate
    0-0-50
  21. potassium nitrate
    • 13-0-46
    • dry
  22. potassium magnesium sulfate
    0-0-21-10Mg-21S
  23. Convert elemental to oxide form
    • O = 16
    • P = 31
    • K = 39
    • calc ratio of P2O5 or K20
  24. Bray-P1 Soil test P levels and interp ppm
    • -10 = deficient
    • 15-30 adeqeate
    • 35 high
    • 40 very high
    • same for corn and soybean
  25. Exchangable K test level and interp ppm
    • 25-100 deficient
    • 88-155 adequate
    • 130-165 high
    • 140-175 very high
    • ppm
    • low end is course, high end is fine and high OM
  26. ammonium fertilizer long term
    acidifies soil
  27. potassium nitrate on soil pH
    increases
  28. soil samples for nematodes
    • sample subsoil
    • keep cool
    • ground beetle
    • beneficial
    • minute pirate bug
    • beneficial
    • syrphidfly larvae
    • benefical
    • eats aphids
  29. Calc growing degree days
    (max + min>/=50))-50
  30. ~GDD to emergance
    115
  31. VE - V10 GDD collor rate
    new collar every 82 GGD
  32. V10- VT GDD colar rate
    new collor every 50 GGD
  33. Lime rec: if pH how much lower then rec?
    .2 to .3
  34. Lime Rec: values on the table are for ? nutralizing capacity and ? depth?
    • 90%
    • 8 inches
  35. N Fertilizer rec calc
    • N(lb/ac) = -27 + (1.36 x yield potential) - N credit
    • N credit: annual legumes = 30, grass pasture = 40
  36. P fertilizer recs: in lb of P205
    • Build up: [(CL-STL)*5] + (YP x CR)
    • Maintain: YP x CR
    • Drawdown: (YR x CR) - [(YP x CR) x (STL - (CL+15))/10]
  37. K fertilizer recs: in lb of K2O
    • Build up: [(CL - STL) x ((1 + (0.05 x CEC))] + (YP x CR) + 20
    • Maintain: (YP x CR) + 20
    • Drawdown: (YP x CR) + 20 - [((YP x CR) + 20) x (STL - (CL + 30))/20]

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