AGRONOMY WRITTEN TEST WITH CORRECT VERIFIED
ANSWERS. LATEST 2024-2025
1. Horizons: layers of soil that make up the soil profile
2. Biological yield: the amount of dry matter produced per unit area
3. economic yield: The amount of the part of the plant of usable marketable value is
called the
4. biomass: the quantity of live organic matter in a given area at a given point in time
is called the
5. Harvest index: the portion of the crop that is of economic importance
6. roots: plants uptake water through the
7. hydroponics: a technique of growing plants (without soil) in water containing
dissolved nutrients
8. sand: soil particles that are 0.02 to 2 mm are called
9. silt: soil particles that are 0.002 to 0.02 are called
10. soil: soil particles that are smaller than 0.002 are called
11. the standerd test weight for a bushel of soybeans is: 60lbs
12. prussic acid poisoning is a potential risk for livestock grazing on what forage
crop: sorghum stalks
13. which of the following are non parasitic plants: mustards
14. which method of pest management uses one organism to control the population
of another: biological pest management
15. which method of pest management use chemicals to control pest populations:
chemical pest management
16. which method of pest management uses physical means such as traps tillage
heat treatment ect to manage pest populations: mechanical pest management
17. which method of pest management uses crop rotations, mulching and or
cultivar to manage pest populations: cultural pest management
18. stage of development of a plant when the plant reaches maximum dry weight is
known as: physiological maturity
19. when the product of interest is at peak qaulity and quantity and will provide
maximum yield is known as: harvest maturity
20. cropland left idle and free of weeds for a period of time to restore productivity
through accumulation of water or nutrients or both is known as a: fallow
21. what is agronomy: the study of crops and soil management
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, .
22. On a plant stem, what is the space between two nodes called?: internode
23. . what is the name of the stalk of a leaf to the stem of a broad leaf plant: petiole
24. what category do the crops wheat, barley oats and rye belong to: small grains
25. To what plant family does wheat belong?: poaceae
26. To what plant family does canola belong: brassiceae
27. to what plant family does alfalfa belong: fabacea
28. to what plant family does peanut belong: fabacea
29. what is the scientific name for alfalfa: Medicago sativa
30. what is the scientific name for corn: Zea mays
31. what is the scientific name for soy beans: glycine max
32. what is the scientific name for peanuts: archis hypogea
33. what is the scientific name for cotton: Gossypium hirsutum
34. what is the scientific name for wheat: Triticum aestivum
35. Peanut production in the United States increased rapidly during the early
1900's when the boll weevil caused serious damage to which crop?: cotton
36. what is a microscopic slender round worm that lives in the soil: nematoad
37. What is reached when a pest infestation reaches the point where the point
where the potential loss exceeds the cost of a chemical application?: economic
threshold
38. what is the most common beneficial species associated with crop production:
lady beetle
39. what what part of the plant do aphids feed: phloem sap
40. the waste produced by aphids is known as: honey dew
41. The wheat curl mite is a vector for which wheat disease?: wheat streak mosaic
virus
42. Barley Yellow Dwarf Virus impacts wheat in oklahoma and is spread by many
aphid. the two main aphids that spread barley yellow dwarf virus are: bird-
cherry oat aphid and green bug
43. what is the localized deaf of leaf tissue termed: necrosis
44. which organism is causes most plant diseases: fungi
45. which of the following can be detected on a crop when exposed to black
light: aflatoxin
46. Which grass species is a cool season, annual and is classified as a restricted
noxious weed?: cheat
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ANSWERS. LATEST 2024-2025
1. Horizons: layers of soil that make up the soil profile
2. Biological yield: the amount of dry matter produced per unit area
3. economic yield: The amount of the part of the plant of usable marketable value is
called the
4. biomass: the quantity of live organic matter in a given area at a given point in time
is called the
5. Harvest index: the portion of the crop that is of economic importance
6. roots: plants uptake water through the
7. hydroponics: a technique of growing plants (without soil) in water containing
dissolved nutrients
8. sand: soil particles that are 0.02 to 2 mm are called
9. silt: soil particles that are 0.002 to 0.02 are called
10. soil: soil particles that are smaller than 0.002 are called
11. the standerd test weight for a bushel of soybeans is: 60lbs
12. prussic acid poisoning is a potential risk for livestock grazing on what forage
crop: sorghum stalks
13. which of the following are non parasitic plants: mustards
14. which method of pest management uses one organism to control the population
of another: biological pest management
15. which method of pest management use chemicals to control pest populations:
chemical pest management
16. which method of pest management uses physical means such as traps tillage
heat treatment ect to manage pest populations: mechanical pest management
17. which method of pest management uses crop rotations, mulching and or
cultivar to manage pest populations: cultural pest management
18. stage of development of a plant when the plant reaches maximum dry weight is
known as: physiological maturity
19. when the product of interest is at peak qaulity and quantity and will provide
maximum yield is known as: harvest maturity
20. cropland left idle and free of weeds for a period of time to restore productivity
through accumulation of water or nutrients or both is known as a: fallow
21. what is agronomy: the study of crops and soil management
1/7
, .
22. On a plant stem, what is the space between two nodes called?: internode
23. . what is the name of the stalk of a leaf to the stem of a broad leaf plant: petiole
24. what category do the crops wheat, barley oats and rye belong to: small grains
25. To what plant family does wheat belong?: poaceae
26. To what plant family does canola belong: brassiceae
27. to what plant family does alfalfa belong: fabacea
28. to what plant family does peanut belong: fabacea
29. what is the scientific name for alfalfa: Medicago sativa
30. what is the scientific name for corn: Zea mays
31. what is the scientific name for soy beans: glycine max
32. what is the scientific name for peanuts: archis hypogea
33. what is the scientific name for cotton: Gossypium hirsutum
34. what is the scientific name for wheat: Triticum aestivum
35. Peanut production in the United States increased rapidly during the early
1900's when the boll weevil caused serious damage to which crop?: cotton
36. what is a microscopic slender round worm that lives in the soil: nematoad
37. What is reached when a pest infestation reaches the point where the point
where the potential loss exceeds the cost of a chemical application?: economic
threshold
38. what is the most common beneficial species associated with crop production:
lady beetle
39. what what part of the plant do aphids feed: phloem sap
40. the waste produced by aphids is known as: honey dew
41. The wheat curl mite is a vector for which wheat disease?: wheat streak mosaic
virus
42. Barley Yellow Dwarf Virus impacts wheat in oklahoma and is spread by many
aphid. the two main aphids that spread barley yellow dwarf virus are: bird-
cherry oat aphid and green bug
43. what is the localized deaf of leaf tissue termed: necrosis
44. which organism is causes most plant diseases: fungi
45. which of the following can be detected on a crop when exposed to black
light: aflatoxin
46. Which grass species is a cool season, annual and is classified as a restricted
noxious weed?: cheat
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