Test 3 stephanie

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Anonymous
ID:
12734
Filename:
Test 3 stephanie
Updated:
2010-03-31 20:57:24
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biology plants
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Plants
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  1. Adding _______________ to saline, sodic, or saline-sodic soils promotes good soil structure, drainage, and Na leaching.
    gypsum
  2. A typical growing medium should contain ________% organic amendments.
    Choose one answer.
    50-75
  3. The number of essential elements that are required by plants for normal growth, development and completion of its life cycle is ______.
    17
  4. _____ is the type of precipitation that occurs if condensation occurs below freezing (when dewpoint is below 32 degrees F) in the upper atmosphere? Also, the water condenses below freezing directly into small loose ice crystals.
    snow
  5. When organic matter is added to soil, its N is converted by the process of mineralization to which N form? _______________
    ammonium
  6. A typical natural soil contains ____% organic matter.
    1
  7. Which ratio fertilizer would be best to use on the non-flowering shade trees in your yard to favor vegetative growth? _____________
    2-1-1
  8. ______ is one of the micronutrients.
    Cu
  9. Severe interveinal chlorosis of young leaves is a deficiency of _____.
    Fe
  10. A garden center is selling a 50 pound bag of 10-10-10 fertilizer for $9.00 and a 50 pound bag of 15-10-15 fertilizer for $11.00. Which is the best purchase for total N?__________________________.
    15-10-15
  11. ________________ is a compacted, impermeable layer in the A horizon that is due to repeated tilling or plowing.
    plow pan
  12. Nitrogen (N) is used by the plant as a component of ______________ and _________________.
    chlorophyll and nucleic acids
  13. Herbaceous plants contain approximately __________% water and woody plants contain approximately ___________% water.
    85-95, 75-85
  14. The roots of plants obtain oxygen for respiration ___________________________.
    directly from the soil environment
  15. The ideal pH for field soil is ______
    6.5
  16. _________________ is the condensation of water onto solid surfaces.
    dew
  17. Coir is an organic growing medium amendment and is a product of the ________________ industry.
    coconut
  18. If one wanted to make a garden soil flocculate, and therefore have better structure, ________________should be added.
    . Ca
  19. ______ is one of the macronutrients.
    Mg
  20. Manure has a low C:N ratio. When farmers add manure to a field it ____________ nitrogen availability in the soil.
    increases
  21. _____________ is the outer weathered layer of the earth's crust.
    soil
  22. An example of a plant that through a symbiotic relationship fixes atmospheric nitrogen is _______________.
    soybean
  23. Nitrogen (N) is used by the plant as a component of ______________ and _________________.
    chlorophyll and nucleic acids
  24. A peat soil could contain ___% organic matter.
    66
  25. The _________________is the part of the root that absorbs most of the water.
    root hair
  26. ___________________is a nitrogen-fixing microorganism that forms a symbiotic relationship with legumes.
    Rhizobium
  27. _____ _ is the type of precipitation that occurs if condensation occurs below freezing (when dewpoint is below 32 degrees F) in the upper atmosphere? Also, the water condenses below freezing directly into small loose ice crystals.
    snow
  28. ___________________ water occurs in large soil pores immediately following a rain, it drains from the soil within 24 hrs.
    gravitational
  29. ________________ humidity is the amount of water vapor in air expressed as a percentage of the amount of water vapor that could be held at saturation.
    relative
  30. ._______ mineral particles contribute most to a soil's water holding capacity.
    clay
  31. ___________________is a blue-green algae that can fix N and may form a symbiotic relationship with Azolla or Cycads
    Anabaena
  32. Maintaining proper water balance is an important function that _______ is involved in.
    . K
  33. The ___ horizon in the soil is the parent material.
    C
  34. From a physical standpoint, _______ soil particles are structurally the most simple.
    sand
  35. The two ways in which soil water is affected by the correct application of mulch are ______________evaporation and _________________ water infiltration.
    decreased, increased
  36. Small new leaves and rosette type new growth is a deficiency of _____.
    Zn
  37. A __________________ soil has a pH of 7-8.5, and has greater than 2,000 ppm total soluble salts.
    saline
  38. ___________________ is the amount of water the soil can hold against the force of gravity.
    field capacity
  39. ________________ is a compacted, impermeable layer in the A horizon that is due to repeated tilling or plowing.
    plow pan
  40. ___________________ water is adsorbed onto soil particles, is held at less than -31 bars of tension, and is not available to the plant.
    hygroscopic

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