Treesearch

Presents TI-59 programs that use fire arrival times to calculate the rate and direction of spread of a fire across a triangular or square plot.

Describes compter-assisted testing for measuring light transmittance of wood and bark chips. Electronic interface permitted the computer to collect physical data accurately and efficiently and to analyze and present the data in several tabular and grapical formats

A new method of communicating wood has resulted in a new wood particle form called chunkwood, which is much larger than the common pulp-size chip. Chunkwood appears well suited for use as a fuel but nothing is yet known about its storage, drying, or combustion characteristics. This paper reports on two exploratory drying experiments we conducted to see whether chunks, with their much larger interparticle voids, dry more readily than chips. In one experiment we used natural convective ambient air to dry chunks and chips and found that chunks dried much faster than chunks. However, the...

In an Upper Peninsula Michigan test of simple design, white spruce of a Beachburg, Ontaria provenance grew 17.5 percent taller than white spruce from the Ottawa N.F. The paper describes how to convert such tests to low-cost, low-risk, highly flexible improvement programs. The approach is applicable to other species of low priority.

Sawtimber harvesting in northern hardwood stands leaves behind a large amount of residue in the form of tops and limbs. This paper presents typical dimensional characteristics of residue for northern hardwood tops incluting data on lengths, widths, diameters, and complete branch details.

Four mature but grossly under-stocked (15 to 23 percent of normal) aspen stands were regenerated by suckering following shearing. Eight years later, aspen standing crop varied with site quality from 3.4 to 8.0 tons per acre -- nearly the potential for these sites at this age. Shearing is as effective as complete clearcutting for regenerating aspen.

A simple procedure using double sampling is described for adjusting growth in the STEMS regional forest growth model to compensate for subregional variations. Predictive accuracy of the STEMS model (a distance-independent, individual tree growth model for Lake States forests) was improved by using this procedure

The 1981 forest inventory of Kansas showed that 2.6 percent of the total land area is forested. Commercial forest land accounted for 89 percent or 1,207,900 acres of the forest land and oak-hickory is the major forest type. An important Kansas resource are the 150,000 acres of natural wooded strips.

Biomass regression coefficients from the literature for the allometric equation form are presented for 98 species of shrubs and herbs in the northern U.S. and Canada. The equation and coeffients provide estimates of grams of biomass (oven-dry weight) for foliage, woody stem and total biomass.

This paper reports field test results of a wood moisture probe''s accuracy in measuring fuel moisture content of dead roundwood. Probe measurements, corrected for temperature, correlated well with observed fuel moistures of 1-inch dead jack pine branchwood.