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

2. 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

3. 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”?

4. 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

5. 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

6. 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

7. Compass Exercise To acquaint applicators about a compass.. –To measure wind direction –To manage drift –To protect sensitive areas –For accurate records

8. Map Compass As an example……… Click here for Coghlan’s Web site See “Products Listing,” then “Compasses” Product No. 8162

9. Parts of a Compass

10. Orientation Arrow

11. Red Needle (points to magnetic North)

12. Black Arrow Outline

13. Rotating Dial

14. Measuring Wind Direction Hold compass flat and level Point red arrow on plastic base into the wind

15. 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

16. Measuring Wind Direction Read wind direction in degrees at base of red arrow 45 degrees (a northeast wind)

17. Compass Guidelines Always hold compass level Use compass away from metal Do not use in tractor cabs

18. Vendors Sporting goods stores Tackle shops Hardware stores Price about $5.00