Score ______________ out of 125

Hour Exam #2

Student's name ________________________________________

ORH 3222C - Turfgrass Culture 4 November 1997

Multiple choice. (85 pts.)

Please read these carefully. Only one response correctly answers the question, or completes the statement. Circle the corresponding letter (a, b, c, d, or e).
1. A 30-pound bag of Milorganite has the analysis 6-2-0. About how many pounds of nitrogen are in the bag?
a) 0.5 b) 1 c) 2 d) 3 e) 20
2. A 5-foot drop spreader applies 10 pounds of 10-10-10 fertilizer across a strip 100 feet long. About how many pounds of nitrogen is applied per thousand square feet?
a) 0.5 b) 1 c) 2 d) 3 e) 20
3. A 50-gallon tank is emptied once in spraying a 2.5-acre pasture. About how many gallons per acre are applied?
a) 0.5 b) 1 c) 2 d) 3 e) 20
4. A 6000-square-foot green is topdressed with sand to a depth of 0.04 inches. About how many cubic feet of sand were used?
a) 0.5 b) 1 c) 2 d) 3 e) 20
5. A gallon of fungicide costs $125. The recommended application is 2 ounces per 1000 square feet. About how many dollars does it cost to treat 1000 square feet?
a) 0.5 b) 1 c) 2 d) 3 e) 20
6. Our class found that 100 hard fescue seed weighed 0.1 grams. If 100 seeds were planted per square foot in a 15,000 square-foot turf area, about how many pounds of seed were used?
a) 0.5 b) 1 c) 2 d) 3 e) 20
7. In the last example, if 9 red fescue seedlings were counted within a 2-foot-diameter sampling ring, what is the percent germination?
a) 0.5 b) 1 c) 2 d) 3 e) 20
8. An herbicide containing 10% active ingredient is to be applied to a 2000-square-foot lawn. The rate is supposed to be 1 pound active ingredient per acre. About how many pounds of herbicide should be used?
a) 0.5 b) 1 c) 2 d) 3 e) 20
9. A bowling green measuring 60 X 200 feet is to be treated with iron at 0.2 grams iron per square meter. How many pounds iron will be used? (As a rule of thumb, five grams per square meter is about one pound per thousand square feet.)
a) 0.5 b) 1 c) 2 d) 3 e) 20
10. A nozzle delivers 1 quart per minute and covers a width of 18 inches. In order to apply 1 gallon per thousand square feet, how fast would a person walk, in feet per second?
a) 0.5 b) 1 c) 2 d) 3 e) 20
11. Deficiencies of micronutrients which are slowly transported (Fe, Mn, Zn) occur:
a) Between the veins and in the older tissue.
b) Between the veins and in the younger tissue.
c) On the veins and in the older tissue.
d) On the veins and in the younger tissue.
e) None of the above.
12. In turfgrass management, the most important corner of the disease triangle is:
a) Susceptible host.
b) Virulent pathogen.
c) Conducive environment.
d) Prompt diagnosis.
e) None of the above.
12. Most turf pathogens are:
a) Bacteria.
b) Fungi.
c) Viruses.
d) Mycorrhizae.
e) Mycoplasmae.
13. Which is a bacteria which produces a biopesticide used against caterpillars?
a) Gaeumannomyces graminis
b) Rhizoctonia solani.
c) Scapteriscus vicinus.
d) Bacillus thuringensis.
e) None of the above.
14. A serious insect pest which can be fatal to people.
a) Rhizoctonia solani.
b) Scapteriscus vicinus.
c) Bacillus thuringensis.
d) Solenopsis invicta.
e) None of the above.
15. Causal agent of brown patch disease.
a) Rhizoctonia solani.
b) Scapteriscus vicinus.
c) Bacillus thuringensis.
d) Solenopsis invicta.
e) None of the above.
16. What is the process by which fertilizers and pesticides are dissolved and carried through the soil column?
a) Percolation.
b) Infiltration.
c) Nitrification.
d) Leaching.
e) None of the above.
17. Pyricularia grisea causes which disease of turfgrasses?
a) Brownpatch.
b) Dollar spot.
c) Take all root rot.
d) Gray leaf spot.
e) It's an insect.

Essay / short answer. (40 pts.)

18. List and briefly describe several design features affecting uniformity in an irrigation system. Mention several corrupting influences, which lead to inadequate uniformity. Be brief.

19. What physical characteristics make a good turf soil, and why? How might this answer vary depending on the use of an area?

20. How would you go about diagnosing a turf injury? How would you distinguish disorders from diseases? How would you distinguish human influences from other factors? Be brief.

21. List the 17 nutrients used by plants and briefly explain their role in turfgrass. You can accomplish this by grouping the nutrients into about four groups, and associating a few keywords with each group, e.g., "Major structural elements obtained from the atmosphere," "Major three nutrients provided in fertilizer," "So-called soil amendments which have a role in pH," and "Micronutrients."