Corn and Sorghum

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Corn and Sorghum
2013-03-31 20:57:24

Lab quiz
Show Answers:

  1. What is the scientific name for corn?
    Zea mays
  2. What type of grass is corn?
    annual, warm grass
  3. What type of root system does corn have?
  4. Corn is grown in every state except for
  5. What states make up the corn belt?
    Iowa, Illinois, Indiana, Nebraska, Ohio
  6. What is grown on more farms than any other crop?
  7. the average daytime temperature for corn is
    70-80 F
  8. the average nightime temperature for corn is
    58 F
  9. How many frost free days are required for corn?
  10. average precipitation for corn is
    25-50", 3 to 4" each month of the growing season
  11. Corn as an average mature height of
    5-12 ft
  12. Corn produces how many ears
    1-2 per plant
  13. What type of soil does corn prefer?
    • very fertie
    • well drained loam
    • pH 5.5-8
  14. is corn dioecious or monoecious
    Monoecious- both male and female on the same plant
  15. Corn ears are the
    pistillate inflorescence
  16. Corn tassels are the
    staminate inflorescence
  17. why is corn a highly cross pollinated species
    cuz of the monoecious flower arrangement
  18. What is MDMV?
    • Maize Dwarf Mosaic Virus
    • transmitted by Aphids from johnsongrass to sweet corn
  19. What is Bacterial Wilt?
    transmitted by insects
  20. What insects cause damage to corn?
    • Corn Borer
    • Sugarcane Borer
    • Spider Mites
    • Corn Leaf Aphids
    • Corn Ear Worm
    • White Grub
  21. How many acres of corn are grown annually in Texas?
    more than a million
  22. Compared to the Corn Belt, yields in the high plains...
    equal or exceed the corn belt because of irrigation
  23. Corn yields increased from _______ bushels from the 1910s to ______ bushels per acre now.
    25 to 200+
  24. Increased corn productivity is due to
  25. Hybrids are
    genetically altered to increase yields
  26. Sorghum's scientific name is
    Sorghum bicolor
  27. Sorghum is grown where
    southern half of US where conditions are too high and droughty for corn
  28. Sorghum is known as
    "corn substitute"
  29. In many countries, sorghum is grown as
    a food grain
  30. In the US, sorghum is grown primarily for
    livestock and poultry feed
  31. 2 types of sorghum
    • grain
    • forage
  32. Grain sorghum is a
    coarse annual grass usually under 5 ft tall
  33. Grain sorghum is grown for
    grain production
  34. Grain sorghum hybrids with juicy stalks have
    high when grain yield is low
  35. Grain sorghum has what kind of root system
  36. grain sorghum fibrous roots are
    • smaller in diamter
    • more extensive
    • more efficient in water and nutrient absorption than corn
  37. Grain sorghum flowers have both
    sterile and fertile florets
  38. 95% of fertile florets are
  39. grain sorghum seeds vary in color from
    • white
    • red
    • dark brown
  40. how many leaves does grain sorghum have?
    7 leaves
  41. Forage sorghum is grown for
    grazing, hay, or silage
  42. forage sorghum grows up to
    6-12 ft
  43. forage sorghum has how many leaves
    8 leaves
  44. forage sorghum is grown  to produce
    maximum yields of high quality forage with limited concern for grain production
  45. sorgo types & hybrids are
    grown for silage
  46. sudangrass & hybrids
    have smaller culms than sorgos and primarily used for hay and grazing
  47. johsongrass is
    a perennial sorghum used for hay and grazing
  48. broom sorghum
    • straw is used to make brooms
    • importance has diminished due to cometitive synthetic fibers
  49. in texas, grain sorghum is planted
    on more acreage than any other crop
  50. texas produces
    35-40% of all grain sorghum produced in the US
  51. differences between grain & forage sorghum
    • heigh
    • purpose for growing
    • number of leaves