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Agronomy Quiz 2 (19 MCQs)

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1. A fertilizer spreader has an effective application width of 37.5 feet. If 21.6 pounds of fertilizer is collected from the spreader in 60 seconds. When traveling 6.8 mph, what is the rate of fertilizer that is being applied per acre with this spreader?
2. Spray drift is the least when which of the following conditions exist?
3. Traci is making plans to seed her field to winter six-row malting barley on her farm in Maryland. The field is capable of producing 135 bu/acre under irrigation. The field has a center pivot irrigation system with eight 156 ft spans and an end gun that effectively reaches 50 ft. Traci will plant in concentric circles under the pivot and leave the dry corners fallow. She is targeting 1.25 million plants per acre, the seed she had purchased has 13, 500 seeds per pound and 92% germination. Barely weighs 48 pounds per bushel. Total nitrogen for the crop will be 1.2 pounds of nitrogen per bushel of grain. She plans on applying 30 pounds of nitrogen broadcast preplant and the remainder in two spring (top-dress) applications. Soil tests were used to make fertilizer recommendations, the recommendations call for 83.7 pounds of P2O5 and 47.3 lbs/ac K20 to be broadcast preplant.If Traci uses UAN 28-0-0 for her spring nitrogen applications, how many total gallons of UAN per acre will she need for her split spring top-dress applications? (1 gal UAN weighs 10.67 pounds)
4. A weed is described as?
5. Which of these is an example of biological aphid control?
6. Epinasty in plants is described as:
7. What is one job available?
8. Nutrient leaching is most likely to occur in what soil type?
9. A ..... plant has a fibrous root system and parallel venation.
10. After an herbicide drifts onto a plant, only small spots on the plant leaves and stem are dead. The herbicide that drifted was most likely what type of herbicide?
11. In small grain production, jointing refers to which of the following?
12. PH is the measurement of the concentration of what ion in the soil?
13. What is the name of the group of nitrogen-fixing bacteria in legume nodules?
14. Visual symptoms of zinc deficiency usually appear as:
15. Current university research shows a soybean yield response to the application of 20 pounds of sulfur preplant. How much 21-0-0-24 per acre do you need to spread?
16. What is the pigment associated with sugar metabolism, when it accumulates in the plant, it gives the plant a reddish/purple color?
17. When thinking of crop nutrient fertilization, what does agronomic rate of application mean?
18. What soil contains significant amounts of naturally occurring calcium carbonate? These soils are characterized by a high soil pH and fizz when a dilute acid is applied.
19. What type of flowering plant takes 12-24 months to complete its life cycle? It grows vegetative the first year and then reproduces the second year.
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