NATIONAL FFA NURSERY/LANDSCAPE CDE GENERAL KNOWLEDGE EXAM 2017 (Questions 26-50)

26. Waylon had $4.32 per pot invested in his crop of 1500 junipers. A landscape company offered him $6.50 per pot, but he rejected their offer and soon sold the entire crop at his asking price of $7.25 per pot. What was his net profit on the crop?

• A. $10,875

• B. $9,750

• C. $4,395

• D. $1,125

27. Heather needs to remove a piece of wire that has wrapped around her rotary mower blade. One thing that she should do as a safety measure is:

• A. tilt the mower back at 30 to 50 degrees.

• B. remove the spark plug wire.

• C. readjust the cutting height.

• D. remove the air filter.

28. A good rule of thumb for mowing grass is to:

• A. secure the emergency cut-off bar with wire on string.

• B. remove no more than 1/3 of the leaf blade at any one time.

• C. cut around trees in the lawn area in a clockwise manner when practical.

• D. use a vertical mower on slopes over 15 percent.

29. Which of these is an LD‐50 rating that would be most toxic to humans?

• A. 43

• B. 19

• C. W-93

• D. 3000

30. The principles of xeriscaping would be best exemplified by a homeowner who:

• A. installs a sprinkler system that operates on a timer.

• B. replaces non-native ornamentals with native plants that do not require irrigation.

• C. lowers the lawn mower blade to reduce the height of the turf.

• D. adjusts the pH of the soil to a desirable level for the turf being grown.

31. A gasoline and oil mix at a ratio in the range of 20:1 to 50:1 is most likely intended for a:

• A. Two-cycle engine

• B. Three-cycle engine

• C. Four-cycle engine

• D. Eight-cylinder tractor

32. Which of these helps keep a retaining wall from collapsing from the force of the soil behind the wall?

• A. Deadmen

• B. Wall bolts

• C. Lag screws and wall bolts

• D. The gravel bed the wall is set upon

33. A homeowner wanted Bermudagrass established in her yard but was concerned about the cost. The landscaper suggested a process where pieces of Bermuda sod are chopped into sections of stems containing one or more nodes. These pieces are distributed over the site and covered lightly by disking and rolling. What method of turf establishment does this describe?

• A. Sodding

• B. Stolonizing

• C. Cultipacking

• D. Rasterizing

34. The purpose of the edging trench cut between the Bermudagrass and pine straw mulch in Figure 3, is to help:

• A. prevent stolons and rhizomes from invading the mulch bed.

• B. direct water onto the sidewalk for adequate drainage.

• C. direct water into the mulch bed for irrigation purposes.

• D. anchor the pine straw during heavy rains and wind.

35. Which of these is NOT a benefit of a mulched area around established landscape trees?

• A. Mulch around trees protects the base of the tree from mowers.

• B. Mulch provides a neat appearance when properly maintained.

• C. Mulch around trees provides a barrier to insects and disease.

• D. Mulch around trees increases the overall speed of mowing.