Posts tagged ‘wood’

Forest health: Insects

A review of categories of insects affecting tree and forest health: Defoliators, borers, sap-sucking insects, root-feeding insects, cone- and seed-destroying insects, and non-native invaders.

Continue Reading April 29, 2007 at 7:27 pm Leave a comment

Forest Health: Overview

Forest health is affected by insect outbreaks, diseases, invasive species, regeneration, fire ecology, natural disturbance, and many other factors.

Fungal growth on birch: Jim Frazier photo

Fungal growth on birch: Jim Frazier photo

Not all insects and diseases are bad. Native insects and diseases are a normal part of a healthy forest. An example is the periodic defoliation events from forest tent caterpillars (armyworms). Minnesota forests evolved in the presence of these bugs, and they recover quickly from outbreaks.

On the other hand, non-native, introduced insects, diseases, and plant species pose a serious threat. Invasives must be addressed quickly. Diseases like Dutch elm disease, shrub species like buckthorn, and new invasive insects like Gypsy moth and emerald ash borer can cause serious forest health problems. It’s critical that landowners learn to identify these species quickly and keep their woodlands healthy and free from invaders to the greatest degree possible.

The pages in this section are designed to provide basic information about forest health issues in Minnesota. Probably the best source of forest health information in Minnesota is the Forest Insect & Disease Newsletter, published by the MN DNR Division of Forestry.

As more and more invasives enter our woods, forest health can seem daunting at times. But it’s important that we all maintain vigorous, healthy native woodlands to the greatest degree we can. Most forest health threats are far easier to prevent than to eradicate once they’re established. Good luck! Your neighbors, as well as future generations, will thank you for it.

April 29, 2007 at 7:26 pm Leave a comment

Harvesting Timber: Overview

An overview of harvesting and selling timber in Minnesota, with links to content on timber harvest contracts, visual impacts, selling timber, the future of your woodlands after harvest, and natural and artificial regeneration.

Continue Reading April 28, 2007 at 8:20 pm Leave a comment

Harvesting and selling timber

A brief overview of different widely accepted methods of selling timber: Lump sum, scale, and percentage. Also links to other useful related sites.

Continue Reading April 28, 2007 at 8:12 pm Leave a comment

Harvesting Timber: The Future of Your Woodland

As you plan a timber sale, it is easy to focus on what can be taken out of the stand.  However, as a landowner committed to the stewardship of your land, you need also to be thinking about what will be left behind.  The trees that remain after the harvest are the ones that you’ll see every time you walk through the woods.  They’re also the seed source for your future woods.

Hardwood logpile in stand

Eli Sagor photo

Every timber harvest should leave the woodland in a better condition than it was beforehand.  This can happen in many different ways.  Partial harvests should be designed to remove less desirable species and trees of relatively poor form.  This will focus growing space on the best of your woodland, improving its vigor, quality, and value.  Partial harvests are also a great way to grow big trees quickly.

The same concept applies to clearcut stands as well.  Well planned and executed timber harvests can greatly improve the productive capacity of the woodlot.  But details do matter.  For example, harvesting aspen in the winter leads to more vigorous new growth.

Why?  In spring and summer, most of the tree’s nutrients are in the growing parts of the tree:  stem, twigs, and leaves.  In winter, nutrients move from leaves to roots, where they’re stored until the next growing season.  If you harvest in winter, these nutrients will be available for a fast, vigorous new growth.  If you harvest in summer, the nutrients will be lost.

Details like this can have important impacts on your timber harvest experience.  Before you harvest, talk to a forester who can help you plan ahead for a successful sale.

April 28, 2007 at 8:05 pm Leave a comment

Written timber harvest contracts

Why it’s important to have a clear written contract when selling timber, with a link to a timber harvest contract for Minnesota.

Continue Reading April 28, 2007 at 8:02 pm Leave a comment

Sample Minnesota timber harvest contract

A sample Minnesota timber harvest contract.

Continue Reading April 28, 2007 at 7:54 pm Leave a comment

Harvesting timber: Visual impacts

Harvesting timber will dramatically change the appearance of your woods. Even a low-intensity partial harvest will require a cleared landing and skid roads, along with deposition of residual slash. This page has basic information about what to expect and how to manage visual impacts during harvest.

Continue Reading April 22, 2007 at 5:23 am 1 comment

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News and information of interest to Minnesota woodland owners. Sister site to

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