1. Minnesota First Detectors What’s in Your Woodpile? Gary Johnson Urban and Community Forester University of Minnesota

2. Minnesota First Detectors

3. Approved Firewood Required on State- Owned Land Obtained from firewood distribution facility on State-owned land Obtained from a firewood dealer approved by the DNR commissioner DNR commissioner approved firewood.

4. Minnesota First Detectors

5. Firewood Quarantine Firewood quarantines State Federal International DNR RF-#### HT Exp DATE

6. Minnesota First Detectors Softwood versus Hardwood Softwoods have Tracheids (fibers), No Vessels (pores). Many have Resin Canals. Resin Canals

7. Minnesota First Detectors Softwoods versus Hardwoods Hardwoods have Fibers and Pores Pores

8. Minnesota First Detectors Ring Porous versus Diffuse Porous Large Pores in Earlywood and Small Pores in Latewood = Ring Porous Hardwood Large, obvious lines are Earlywood. Smaller,darker heartwood or lighter sapwood lines are Latewood.

9. Minnesota First Detectors Ring Porous Wood: Black Ash

10. Minnesota First Detectors Ring Porous Wood: Bur Oak

11. Minnesota First Detectors Ring Porous Wood: American Elm

12. Minnesota First Detectors Semi Ring Porous: Black Walnut

13. Minnesota First Detectors Ring Porous versus Diffuse Porous Pores about same size and distributed evenly throughout growth ring = Diffuse Porous.

14. Minnesota First Detectors Diffuse Porous Wood: Basswood

15. Minnesota First Detectors Diffuse Porous Wood: Boxelder

16. Minnesota First Detectors Diffuse Porous Wood: Big Toothed Aspen

17. Minnesota First Detectors “Other” Features: Elm Bark Cross-Section Layered Bark of American and Rock Elm

18. Minnesota First Detectors “Other” Features: Long-Grain of Elm

19. Minnesota First Detectors “Other” Features of Oak: Rays Rays

20. Minnesota First Detectors Versus, No Rays in Ash Cracks or Checks, but not Rays

21. Minnesota First Detectors “Other” Features: Elm and Hackberry Both Have Wavy (tiretrack) summerwood

22. Minnesota First Detectors “Other” Features: Elm and Hackberry Hackberry has Corky Ridges on Bark, no Layered Cross-Section

23. Minnesota First Detectors “Other” Features: Red vs. White Oak Sodium Nitrite turns White Oak Heart Wood Blue to Purple

24. Minnesota First Detectors “Other” Features: Black Walnut Medium brown to dark chocolate heartwood.

25. Minnesota First Detectors Let’s Quiz the Log Splitter!

26. Minnesota First Detectors What is It?

27. Minnesota First Detectors What is it? 0 of 30 1. Hackberry 2. Chokecherry 3. Crabapple 4. River Birch 5. Chokeberry

28. Minnesota First Detectors What is It?

29. Minnesota First Detectors What is it? 0 of 30 1. Birch 2. Cottonwood 3. Big-Toothed Aspen 4. Silver Maple 5. Black Cherry

30. Minnesota First Detectors What is It?

31. Minnesota First Detectors What is it? 0 of 30 1. Black Walnut 2. Buckthorn 3. Bur Oak 4. Boxelder 5. Ironwood

32. Minnesota First Detectors What is It?

33. Minnesota First Detectors What is it? 0 of 30 1. White Oak 2. Hickory 3. Hackberry 4. Winged Euonymus 5. Bur Oak

34. Minnesota First Detectors What is It?

35. Minnesota First Detectors What Is It? 1. Cottonwood 2. Green Ash 3. Hackberry 4. Elm 5. Linden 0 of 30

36. Minnesota First Detectors What is It?

37. Minnesota First Detectors What is it? 0 of 30 1. Elm 2. Boxelder 3. Silver Maple 4. Ironwood 5. Linden

38. Minnesota First Detectors What is It?

39. Minnesota First Detectors What is it? 0 of 30 1. Black Pine 2. Black Cherry 3. Austrian Pine 4. Douglas Fir 5. White Cedar

40. Minnesota First Detectors What is It?

41. Minnesota First Detectors What is it? 0 of 30 1. White Cedar 2. Sugar Maple 3. Ponderosa Pine 4. Black Cherry 5. Douglass Fir

42. Minnesota First Detectors What is It?

43. Minnesota First Detectors What is it? 1. Linden 2. Sugar Maple 3. Black Ash 4. Elm 5. Green Ash

44. Minnesota First Detectors Questions… Gary Johnson UM Urban & Community Forester University of Minnesota Extension Foresters: Angela Gupta, Rochester Mike Reichenbach, Cloquet Gary Wyatt, Mankato