CDE Handbook - Florida FFA Association

Forestry CDE
80
21. Hypoxylon Canker
22. Ips Engraver Beetles
23. Japanese Climbing Fern
24. Juniper Blight
25. Kudzu
26. Melaleuca
27. Mistletoe
28. Mites
29. Needle Cast of Pines
30. Oak Leaf Blister
31. Pine Coneworms
32. Pine Needle Rust
33. Pine Sawflies
34. Pine Scale
35. Pine Tip Moths
36. Pine Webworm
37. Pitch Canker
38. Psocids
39. Red Heart of Pine
40. Reproduction Weevil
41. Slime Flux
42. Southern Pine Beetle
43. Termite Damage
44. Twig Girdler
45. Variable Oakleaf Caterpillar
Timber Cruising For Wood Volume (100 Points)
Each event location will have either Saw Timber or Pulpwood.
Participants are advised to be familiar with both applications,
but only one will appear on the contest. The trees measured at
the site will represent a partial acre, and students are expected to
calculate the total volume per acre.
Timber Cruising for Board Volume (Saw Timber)
1. Using a Biltmore stick each contestant will measure
ten (10) pre-numbered trees,on a fractional acre plot,
for total board foot volume as specified by the Field
Day Coordinator. The contestant must record the DBH
(Diameter Breast
2. Height) computed to the nearest inch and the
merchantable height of each tree, rounded down to the
nearest ½ log.
3. There will be no cull trees on the contest. In the case of a
forked tree, students should measure the dominant stem.
4. The following minimum diameters and log length will be:
DBH - 10 inches
Top Diameter - 8 inches
Height - 16 feet (one log)
Florida FFA Career Development Event Handbook
5. Contestants will be allowed fifteen (15) minutes to record
DBH and height of the trees and an additional fifteen (15)
minutes to make volume recordings and conversions.
Volume tables will be provided at the contest site.
6. Three (3) points will be awarded for the correct DBH and
three (3) points for the correct height.
7. One (1) point will be allowed if the answer is incorrect but
within one inch of the DBH or ½ log of the correct height.
Forty (40) points will be allowed for any answer within
10% of the correct total volume.
8. Ten (10) points will be deducted from the forty points
for each additional ten percent (plus or minus) from the
correct measured volume beyond the first ten percent. (i.e.
30 points if answer is between 10 and 20% from the correct
answer, 20 points for 20 to 30% from the correct answer,
etc.)
Timber Cruising for Cord Volume (Pulpwood)
1. Using Biltmore Stick each contestant will measure ten
(10) pre-numbered standing trees, on a fractional acre
plot, for total cord volume as specified by the Field
Day Coordinator. The contestant will record the DHB
(Diameter Breast Height) and merchantable height of each
tree. The height will be rounded down to the nearest 5 ¼’
stick. The DHB will be to the nearest inch.
The following minimum diameters and log length will be:
DBH- 5 inches
Height - 12 feet
Top Diameter - 4 inches
2. Volume tables and the amount of cubic feet per cord will
be provided for calculation at the contest site.
3. Contestants will be allowed fifteen (15) minutes to record
DBH and height of the trees and an additional fifteen (15)
minutes to make volume recordings and conversions.
4. Three (3) points will be awarded for the correct DBH and
three (3) points for the correct height. One (1) point will be
allowed if the answer is incorrect but within one inch of the
correct DBH or one stick of the correct height. Forty (40)
points will be allowed for any answer within 10% of the
correct total volume. Ten (10) will be deducted from the
forty points for each additional ten percent (plus or minus)
from the correct measured volume beyond the first ten
percent. (i.e. 30 points if answer is between 10 and 20% off
from the correct answer, 20 points for 20 to 30% off from
the correct answer, etc.)
Map Interpretation (100 points)