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Whats in Your Woodpile? Gary Johnson Urban and Community Forester University of Minnesota.

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Presentation on theme: "Whats in Your Woodpile? Gary Johnson Urban and Community Forester University of Minnesota."— Presentation transcript:

1 Whats in Your Woodpile? Gary Johnson Urban and Community Forester University of Minnesota

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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.

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5 Penalties: After May 1, 2008 Confiscation of firewood, and $100 penalty (purchaser), or $100 penalty for each sale (dealer) *Firewood: any wood intended for campfire.

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

7 Softwoods versus Hardwoods Hardwoods have Fibers and Pores Pores

8 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 Ring Porous Wood: Black Ash

10 Ring Porous Wood: Bur Oak

11 Ring Porous Wood: American Elm

12 Semi Ring Porous: Black Walnut

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

14 Diffuse Porous Wood: Basswood

15 Diffuse Porous Wood: Boxelder

16 Diffuse Porous Wood: Big Toothed Aspen

17 Other Features: Elm Bark Cross- Section Layered Bark of American and Rock Elm

18 Other Features: Long-Grain of Elm

19 Other Features of Oak: Rays Rays

20 Versus, No Rays in Ash Cracks or Checks, but not Rays

21 Other Features: Elm and Hackberry Both Have Wavy (tiretrack) summerwood

22 Other Features: Elm and Hackberry Hackberry has Corky Ridges on Bark, no Layered Cross-Section

23 Other Features: Red vs. White Oak Sodium Nitrite turns White Oak Heart Wood Blue to Purple

24 Other Features: Black Walnut Medium brown to dark chocolate heartwood.

25 Lets Quiz the Log Splitter!

26 What is It?

27 1. Hackberry 2. Chokecherry 3. Crabapple 4. River Birch 5. Chokeberry What is it?

28 What is It?

29 What is it? 1. Birch 2. Cottonwood 3. Big-Toothed Aspen 4. Silver Maple 5. Black Cherry

30 What is It?

31 What is it? 1. Black Walnut 2. Buckthorn 3. Bur Oak 4. Boxelder 5. Ironwood

32 What is It?

33 What is it? 1. White Oak 2. Hickory 3. Hackberry 4. Winged Euonymus 5. Bur Oak

34 What is It?

35 What Is It? 1. Cottonwood 2. Green Ash 3. Hackberry 4. Elm 5. Linden

36 What is It?

37 1. Elm 2. Boxelder 3. Silver Maple 4. Ironwood 5. Linden What is it?

38 What is It?

39 1. Black Pine 2. Black Cherry 3. Austrian Pine 4. Douglas Fir 5. White Cedar What is it?

40 What is It?

41 1. White Cedar 2. Sugar Maple 3. Ponderosa Pine 4. Black Cherry 5. Douglass Fir What is it?

42 What is It?

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

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


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