Clemson University



SAMPLE TEAM PROBLEMS

SC FFA State Agronomy Contest

2012

*Round to two decimal places unless instructed otherwise.

1. Mary Lou planted 450 acres of corn. She planted 32,000 seeds per acre using 80,000 kernel bags of seed corn with a 90% germination rate. Her planter is set on 30 inch rows and each bag costs $185.00

a. What will the plant population be per acre?

b. How many seeds per row foot should be planted?

c. How many inches should be between the kernels?

d. How many bags of corn did she purchase?

e. What is Mary Lou’s seed cost per acre?

2. John is trying to determine the speed of his 4-wheeler to calibrate his pull-behind power sprayer. It takes him 32 seconds to travel his 180 foot test course. What is his groundspeed in MPH?

3. Sarah has a round pen where she trains horses. The diameter of the pen is 65 feet and she wants to cover the entire pen with an additional 4 inches of sand.

a. What is the area of the pen in square feet?

b. How many cubic yards does Sarah need?

4. Larkin sprays a pre-emergent herbicide, Barricade, to 60 acres on a golf course at a rate of 2 pints per acre. Barricade can be purchased in a 1 gallon container costing $90 or a 2.5 gallon container costing $180.00

a. How many gallons of Barricade does Larkin need to complete the job?

b. Is it cheaper for him to purchase the herbicide in the 1 gallon or 2.5 gallon containers?

c. Using the cheapest option, what is his cost for the entire 60 acres?

d. Using the cheapest option, what is his cost per acre?

5. John is preparing to spray his 100 acres of pasture with Crossbow herbicide at the labeled rate of 4.5 pounds of active ingredient per acre. Crossbow has 3 pounds of active ingredient per gallon.

a. How many gallons of Crossbow will John need for his entire application?

b. How many 2 ½ gallon containers does John need to purchase to complete the job? (Note: You cannot purchase part of a container)

6. JT Bird applied 150-80-70 units of fertilizer per acre to 650 acres of corn land. He used 46-0-0 urea at $410 per ton, 18-46-0 DAP at $499 per ton, and 0-0-60 muriate of potash at $510 per ton to make his desired units. Round fertilizer units to the nearest whole number while working problem and for final answer.

a. What is the ratio of his desired fertilizer units?

b. How many pounds per acre of bulk fertilizer were applied?

c. How many total tons of fertilizer were used?

d. What was the price per acre of the fertilizer?

7. A cylindrical grain bin containing 20,000 bushels has a diameter of 42 feet and a height of 22 feet to the top of the roof.

a. From the given information, how many bushels could the bin hold if it could be filled completely? (Note: 1 bushel = 1.25 cubic feet)

b. What percent capacity is the bin at with 20,000 bushels in it?

8. Your Ag teacher asks you to fertilize your high school’s Bermudagrass football field in April at a rate of 1.5 pounds of actual Nitrogen per 1,000 ft2. You are to use 16-4-8 fertilizer, and the field is 360’ x 160’.

a. How many pounds of 16-4-8 would you apply per 1,000 ft2?

b. What is the area of the field, in square feet?

c. What is the area of the field, in acres?

d. How many total pounds of fertilizer would you need for the field?

e. How many 50 pound bags would you need to buy? (You must buy whole bags)

9. You are replanting a 10 acre plantation pine site after a clear cut; the rows are 10 feet apart and 5 feet apart within the row. If there are 500 seedlings per bag, how many bags do you need to order?

10. Joseph owns a 558 acre farm. He plans to plant 179 acres in wheat. Joseph has planted the 110 acre field on the ridge.

a. What percent of the wheat remains to be planted?

b. If he expects a wheat yield of 60 bushels per acre, but in fact, it is 15% less due to drought, what is his yield per acre?

c. What is his total production in bushels?

11. Steve used a 36-foot air drill with 15 inch rows to plant 450 acres of soybeans. He planted 18 acres per hour and used .92 gallons of diesel fuel per acre. The fuel sells for $2.99 per gallon.

a. How many gallons of fuel will he used to plant his soybean crop?

b. What is his total cost for diesel fuel?

c. What was the fuel cost per acre?

d. At what speed did he travel?

e. How many hours did it take to plant the soybeans?

12. You go to the hardware store to purchase fertilizer for your yard. 40 pound bags of 17-17-17 cost $17.50 and 40 pound bags of 5-10-10 costs $7 per bag.

a. How many pounds of actual Nitrogen are in a 40 lb bag of 17-17-17?

b. How many pounds of actual Nitrogen are in a bag of 5-10-10?

c. If you are solely concerned about meeting your yard’s nitrogen requirements, which would be the cheapest product to use?

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