AGRY 525 Quiz I

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Author:
MRK
ID:
257040
Filename:
AGRY 525 Quiz I
Updated:
2014-02-17 09:30:24
Tags:
Crop Phys
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Description:
Quiz I Introduction, Photosynthesis
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  1. ___% malnourished
    ___ GJ/person/year
    grain production 2008 ____ kg/person/year
    • 30
    • 8.4
    • 371
  2. ___% arable land not being utilized
    12
  3. WUE for: Alfalfa, Corn
    • Water Use Efficiency
    • 1500:1
    • 500:1
  4. ___% dry weight from Photosynthesis
    ___% from soil minerals
    • 90-95
    • 5-10
  5. N fixing takes ___KgN/ha
    which is ____ kg sugar equvilent
    and ____t yield equivalent?
    • 150
    • ~3000
    • 1.5
  6. Takes ___ g CHO/gN to convert NO3
    2.3
  7. Photosynthesis Equation
    6CO2 + 12H2O + light -> C6H12O6 + 6H2O + 6 O2
  8. Sun's Energy:
    Earth gets _____
    ___ tons/second lost
    ___ life span ___ left
    • 1/billionth of sun's radiation
    • 4
    • 10 billion, 5 billion
    • Fusion (H + He)
    • Mass loss ~small but E = mc2 so energy is huge
  9. Crops generally have _____ GJ/km2 of energy from sun
    400-600
  10. LAI
    ___ corn optimum
    • leaf area intrest
    • 4
    • 1 = 1 layer of leaf over soil
    • Plant specific
  11. How to increase LAI
    • Plant earlier
    • Increase population
    • Narrow Rows
    • Row orientation (N/S > EW slightly)
    • Fertilizers (starter)
    • Leaf Angle (upright)
    • Stay Green
  12. PAR
    • Photosynthetically Active Radiation
    • 400-700 nm
  13. Optimum light lost in crop canopy
    5%
  14. Photosynthesis efficency
    3.6%
  15. Products of Light Rxn
    • ATP
    • NADPH
    • Very reactive
    • large and difficult to transport
    • can' build a plant out of them
  16. Sucrose
    • glucose & Fructose
    • separate they are reactive, inert when together
    • Both reducing sugars
  17. C3 Calvin-Benson Cycle
    • Ribulose bis-phospate + CO2 -> 2 Phosogyceric acid
    • 5C + 1C -> 2(3C)
    • RuBP Carboxylase (Catalyzes)
  18. C4 (Hatch-Slack)
    • P-enolpyruvate + CO2 -> 1 oxalactate
    • 3C + 1C -> 4C
    • Catalyzed by PEP Carboxylase
  19. Plastocyanin
    Contains Cu
  20. Cytochrome bf
    contains Fe and S
  21. PS II
    • Contains Mn
    • Comes first
    • Has 400 chlorophyll cells
  22. PS I
    Has 400 chlorophyll
    • m, g, uptake
    • m, g , uptake

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