Treesearch

Contains abstracts of 26 papers given at the Seedling Physiology and Growth Problems in Oak Planting Workshop, held in Columbia, Missouri in November, 1979.

Contains 16 papers presented at the 1980 Minnesota Forest Resource Inventory Conferences.

Describes the design and creation of two databases using data from a unit of the fourth Minnesota Forest Inventory, and analyzes the cost-effectiveness of each.

Presents the structure of STEMS, a computer program for projecting growth of individual trees within the Lake States Region, and discusses its input, processing, major subsystems, and output. Includes an example projection.

Biomass prediction equations were developed for some common ground cover plants from forest communities of northeastern Minnesota. The allometric function was used to predict biomass (dry weight) with ocular estimates of percent ground cover of the plant as the independent variable.

Describes in detail a management subsystem to simulate cutting in Lake States forest types. This subsystem is part of a Stand and Tree Evaluation and Modeling System (STEMS) contained in the Forest Resource Evaluation Program (FREP) for the Lake States. The management subsystem can be used to test the effect of alternate management strategies.

White spruce seedlings--20, 19, 18, and 17 inches tall--were selected among 2-2 transplants; controls from the same beds averaged 7.7 inches tall. After 18 years in the field, the selected seedlings continued to have a 30 percent height growth advantage over the controls. This note discusses how to incorporate super spruce seedlings into a tree breeding program.

The original site index curves for balsam fir and white spruce are revised from a breast height age to a total age basis. Site index values from these revised curves are thus comparable to index values for other species that are based upon total tree age. This note also includes formulations for estimating site index by using computers or programmable, hand-calculators

An efficient Ceramic-Cup Water Collection Instrument (CCWCI, "quickie") is described. Soil water collection from ceramic-cup samplers may require compositing by equal volume from distantly spaced samplers, or simultaneous water collection spaced samplers, or simultaneous water collection from closely spaced samplers without compositing. All collection must be done with minimal opportunity for sample contamination. the CCWCI combines these and other soil water collection needs into a streamlined system that may be adapted to a variety of experimental designs and field conditions.

Calcium cyanamide, a nitrogenous fertilizer, was evaluated in new plantings of black walnut, white ash, and white oak seedlings and 2- and 3-year-old white oak and white ash trees, respectively. Only the growth of black walnut seedlings and white ash trees was improved by CaCN2. Some weeds were controlled by CaCN2, but the amount of weed control was not significantly influenced by the rate of CaCN2. Only the survival of white oak seedlings was affected by CaCN2.