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AGRONOMY EXAM QUESTIONS AND ANSWERS 2024 -2
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AGRONOMY EXAM QUESTIONS AND ANSWERS 2024 -2
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AGRONOMY EXAM QUESTIONS AND ANSWERS 2024 #21. What is agronomy?: the study of crop and soil managment
2. On a plant stem, what is the space between two nodes called?: internode
3. What is the name of the stalk that attaches a leaf to the stem of a broad-leafed plant?:
petiole
4. To which category do the crops wheat, barley, oat and rye belong?: small grain crops
5. Peanut production in the United States increased rapidly during the early 1900's when the boll
weevil caused serious damage to which crop?: cotton
6. What is a microscopic, slender, round worm that lives in the soil?: nematode
7. What is reached when a pest infestation reaches the point where the poten- tial loss exceeds the
cost of a chemical application?: economic threshold
8. On which plant part do aphids feed?: plant sap
9. What is the most common beneficial insect species associated with crop production?: lady
beetle
10.What is the localized death of leaf tissue termed?: Necrosis
11.Which organism causes most plant diseases?: fungi
12.Which of the following can be detected on a crop when exposed to a black light?: aflatoxin
13.Which grass species is a cool season, annual and is classified as a restricted noxious
weed?: cheat
14.Which of the following is a prohibited noxious weed in Oklahoma?: yellow nutsedge
15.Bacteria from which genera form associations with legumes, to give the ability to make use of
atmospheric nitrogen?: rhizobium
16.Which of the following describe the process of inoculation?: applying bac- teria that fix
nitrogen
17.How can you determine if nitrogen-fixing bacteria have infected your legume crop?:
nodules are present
18.Which of the following terms describes a herbicide application that is made after planting and
before crops and weeds emerge?: pre-emergence
19.Which of the following determines the rate of pesticide that is applied per acre?: effective spray
width per nozzle, ground speed of the sprayer & nozzle flow rate
20.Which of the following types of sprayer nozzles allows for the penetration of the plant canopy
and covers the underside of the leaves?: hallow cone
21.Where will a deficiency of any "primary plant nutrient" first appear?: lower leaves
22.What is the first visual symptom of a plant suffering from a deficiency of nitrogen?: chlorosis
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, AGRONOMY EXAM QUESTIONS AND ANSWERS 2024 #2
23.What does the term "chlorosis" mean?: yellowing of the leaves
24.Which of the following is a visual sign associated with phosphorus defi- ciency?: purple
leaves
25.Nitrogen, phosphorus and potassium are referred to as what type of plant nutrients?: primary
26.Calcium, magnesium and sulfur are referred to as what type of plant nutrients?:
secondary
27.On a world-wide basis, what is the most limiting nutrient element for plant growth?: nitrogen
28.Which primary plant nutrient promotes rapid vegetative growth?: nitrogen
29.What is the function of phosphorus in a plant?: energy transfer
30.What is the symbol for the element responsible for improving stem strength?: K
31.Alfalfa uses large amounts of which element?: potassium
32.Peanut requires large amounts of which element?: calcium
33.Relative to wheat, canola requires more of which element?: sulfur
34.What is the primary material used to provide calcium to crop?: agricultural lime
35.Which of the following forms of agricultural lime should be used if magne- sium is also needed in
the soil?: Dolomite
36.When should a crop producer place the seed in direct contact with fertiliz- er?: never
37.What should a crop producer do to determine how much fertilizer to apply to a field?: test the
soil nutrient content
38.When should agricultural lime be applied?: before planting
39.What is likely to occur when too much fertilizer is applied to a field?: crop toxicity
40.What is the minimum percentage of plant food in a fertilizer is referred to as?: guaranteed
analysis
41.Which of the following is an example of an organic fertilizer?: poultry litter
42.What is vegetation produced with the intent of plowing it into the soil to improve the organic
matter content termed?: green manure
43.How is the quality of an agricultural lime material measured?: Effective Calcium Carbonate
Equivalent (ECCE)
44.What is the application of fertilizers, herbicides, and/or insecticides through irrigation
systems called?: chemigation
45.You are going to divide your yearly application of fertilizer into two or more applications. What is
the term for this type of application?: split application
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