Treesearch

Discusses recent Iowa forest industry trends, timber removals for industrial roundwood in 1980, production and receipts of saw logs in 1988, and production of other industrial roundwood products in 1988. Reports on wood and bark residue generated at primary mills and the disposition of this residue.

Shows 1988 veneer-log production and receipts by species in the Lake States (Michigan, Minnesota, and Wisconsin) and in the Central States (Illinois, Indiana, Iowa, and Missouri). Comparisons are made with similar data in 1984. Includes tables showing veneer-log production and receipts (for selected years) since 1946 in the Lake States and since 1956 in the Central States.

Presents a graphical procedure for evaluating the same sensitivity of lakes to acidification due to acid deposition. The procedure is based on empirical relationships between sulfur (and in some cases nitrogen) deposition rates and lake pH, acid-neutralizing capacity, base cation concentrations, and the amount of runoff.

Describes nongame bird densities and diversity in a central Missouri oak-hickory forest 1 year before and 3 years after portions were clearcut. Discusses changes in species density and diversity and their management implications.

Describes research designed to detect subtle regional tree growth trends related to sulfate (SO4) deposition in the Lake States. Correlation methods were used to analyze climatic and SO4 deposition. Effects of SO4 deposition are greater on climatically stressed trees, especially pine species on dry sites, than on unstressed trees. Jack pine growth shows the strongest correlation to both climate and acid deposition.

Describes the symptoms, host range, impacts, biology, and control of Sirococcus shoot blight caused by the fungus Sirococcus conigenus in the Lake States.

Describes methodology for collecting, instrumenting, and measuring acid soils using soil columns as lysimeters and reports the effects of varying acid precipitation and litter-humus treatments.

Simple second-order (quadratic) polynomials were used to model the relationship between 3-year biomass increase (net ovendry weight in grams) and flooding duration (days) for four combinations of shrub type (alder, willow) and soils type (fine-sand, clay-loam).

Presents and compares the chunkwood sizes obtainable with the USDA Forest Service prototype wood chunker using four different blade configurations, and the results of further chunkwood reduction with three methods totally separate from the chunking process.

This revised user`s guide will help fire managers interpret the output from FIREFAMILY, a computer program that uses historic weather data for fire planning. With the changes in the National Fire-Danger Rating System, all Forest Service units will need to rerun their historical weather data and use this publication to revise their fire plan. The guide describes options within the program and explains various tables and graphs necessary for planning. It also provides computer specialists with details needed to run the program.