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What’s in Your Woodpile?. Gary Johnson & Angela Gupta University of Minnesota Extension. Firewood Regulations. There are restrictions on regulated articles due to the Emerald Ash Borer (EAB) quarantine H ardwood (non-coniferous) firewood is a regulated article

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What s in your woodpile

What’s in Your Woodpile?

Gary Johnson & Angela Gupta

University of Minnesota Extension


Firewood regulations

Firewood Regulations

  • There are restrictions on regulated articles due to the Emerald Ash Borer (EAB) quarantine

  • Hardwood (non-coniferous) firewood is a regulated article

  • Regulated articles cannot be moved out of quarantined areas unless accompanied by a Minnesota Department of Agriculture (MDA) certificate


Firewood regulations1

Firewood Regulations

Quarantined Counties


Firewood regulations2

Firewood Regulations

Quarantined Counties


Firewood regulations3

Firewood Regulations

  • MDA certificates require an active compliance agreement with the MDA or USDA

  • Under the conditions of a compliance agreement, certificates may be issued for firewood that has been heat treated to specific temperatures in a kiln to render it safe

  • MDA certified firewood is allowed to move freely around the state


Dnr approved firewood required on state owned land

DNR-approved Firewood Required on State- Owned Land

  • DNR lands have additional firewood regulations. Regardless of any quarantines, firewood must be either:

  • Obtained from a firewood distribution facility on State-owned land, or

  • Obtained from a firewood dealer approved by the DNR commissioner (with receipt)


Softwood versus hardwood

Softwood versus Hardwood

Resin Canals

Softwoods have Tracheids (fibers), No Vessels (pores). Many have Resin Canals.


Softwoods versus hardwoods

Softwoods versus Hardwoods

Pores

Hardwoods have Fibers and Pores


Ring porous versus diffuse porous

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.


Ring porous wood black ash

Ring Porous Wood: Black Ash


Ring porous wood green ash

Ring Porous Wood: Green Ash


Ring porous wood bur oak

Ring Porous Wood: Bur Oak


Ring porous wood american elm

Ring Porous Wood: American Elm


Semi ring porous black walnut

Semi Ring Porous: Black Walnut


Ring porous versus diffuse porous1

Ring Porous versus Diffuse Porous

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


Diffuse porous wood basswood

Diffuse Porous Wood: Basswood


Diffuse porous wood boxelder

Diffuse Porous Wood: Boxelder


Diffuse porous wood big toothed aspen

Diffuse Porous Wood: Big Toothed Aspen


Other features elm bark cross section

“Other” Features: Elm Bark Cross-Section

Layered Bark of American and Rock Elm


Other features long grain of elm

“Other” Features: Long-Grain of Elm


Other features of oak rays

“Other” Features of Oak: Rays

Rays


Versus no rays in ash

Versus, No Rays in Ash

Cracks or Checks, but not Rays


Other features elm and hackberry

“Other” Features: Elm and Hackberry

Hackberry

American Elm

Both Have Wavy (tire track) summerwood


Other features elm and hackberry1

“Other” Features: Elm and Hackberry

Hackberry has Corky Ridges on Bark, no Layered Cross-Section


Other features red vs white oak

“Other” Features: Red vs. White Oak

Sodium Nitrite turns White Oak Heart Wood Blue to Purple


Other features black walnut

“Other” Features: Black Walnut

Medium brown to dark chocolate heartwood.


Let s quiz the log splitter

Let’s Quiz the Log Splitter!


Which log is hardwood

Which log is hardwood?


Which log is hardwood1

Which log is hardwood?

  • Log on the left

  • Log on the right

0 of 5


What is this

What is this?


What is this1

What is this?

  • Oak

  • Ash

  • Walnut

  • It’s hardwood; that’s all I need to know.

  • I don’t know.

0 of 5


What is this2

What is this?


What is this3

What is this?

  • Maple

  • Oak

  • Walnut

  • Pine

  • Don’t know.

0 of 5


What is it

What is It?


What is it1

What is it?

Hackberry

Chokecherry

Crabapple

River Birch

Chokeberry

0 of 5


What is it2

What is It?


What is it3

What is it?

  • Birch

  • Cottonwood

  • Big-Toothed Aspen

  • Silver Maple

  • Black Cherry

0 of 5


What is it4

What is It?


What is it5

What is it?

Black Walnut

Buckthorn

Bur Oak

Boxelder

Ironwood

0 of 5


What is it6

What is It?


What is it7

What is it?

White Oak

Hickory

Hackberry

Winged Euonymus

Bur Oak

0 of 5


What is it8

What is It?


What is it9

What Is It?

  • Cottonwood

  • Green Ash

  • Hackberry

  • Elm

  • Linden

0 of 5


What is it10

What is It?


What is it11

What is it?

  • Elm

  • Boxelder

  • Silver Maple

  • Ironwood

  • Linden

0 of 5


What is it12

What is It?


What is it13

What is it?

Black Pine

Black Cherry

Austrian Pine

Douglas Fir

White Cedar

0 of 5


What is it14

What is It?


What is it15

What is it?

White Cedar

Sugar Maple

Ponderosa Pine

Black Cherry

Douglas Fir

0 of 5


What is it16

What is It?


What is it17

What is it?

5

  • Linden

  • Sugar Maple

  • Black Ash

  • Elm

  • Green Ash

0


Questions

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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