Transcript Measuring Wind Direction With A Map Compass Tools For Pesticide Applicators Larry Schulze Pesticide Education Specialist University of Nebraska- Lincoln Extension.

Measuring Wind Direction
With A Map Compass
Tools For
Pesticide Applicators
Larry Schulze
Pesticide Education Specialist
University of Nebraska- Lincoln Extension
Wind Direction & Velocity
• Have strong impact upon
pesticide applications
• Influence the ability to
damage sensitive / off target
areas
• Drift is a primary regulatory
compliant and concern
Determination of
Wind Direction
• What direction is the wind?
• Example: South
• What is the possible impact of
the use of a very general wind
direction such as “south”?
Determination of
Wind Direction
• In a court of law, a “south” wind
–May be construed to be anything
just south of east through just
south of west
–About 170 degrees
–“South” is not accurate
–Be more exact
•
•
•
•
What Direction
Is The Wind?
North?
Northeast?
East?
Southeast?
•
•
•
•
South?
Southwest?
West?
Northwest?
• With 360 degrees in a circle
– There are 45 degrees in each
selection of the above directions
– This is still not specific enough
Wind Direction
• It’s crucial to accurately record
the wind direction
–For good application records
• It’s not required, but
recommended
–To protect one’s actions
–To reduce potential liability
Compass Exercise
• To acquaint applicators about a
compass..
–To measure wind direction
–To manage drift
–To protect sensitive areas
–For accurate records
Map Compass
As an example………
Click here for Coghlan’s Web site
See “Products Listing,”
then “Compasses” Product No. 8162
Parts of a Compass
Orientation Arrow
Red Needle
(points to magnetic North)
Black Arrow Outline
Rotating Dial
Measuring Wind
Direction
• Hold
compass flat
and level
• Point red
arrow on
plastic base
into the wind
•
Measuring Wind
Direction
Observe red
needle with green
tip points to
magnetic North
• Turn compass dial
until black arrow
outline is under
the red needle
Measuring Wind
Direction
• Read wind
direction in
degrees at
base of red
arrow
• 45 degrees
(a northeast
wind)
Compass Guidelines
• Always hold
compass level
• Use compass away
from metal
• Do not use in tractor
cabs
Vendors
• Sporting goods
stores
• Tackle shops
• Hardware stores
• Price about $5.00