Treesearch

Soil properties were monitored in early spring and late fall for 3 years following hay meadow abandonment. Bulk density decreased, organic carbon increased, total porosity increased in the large pore fraction, and infiltration rate increased 100%. Earthworm activity was considered to be primarily responsible for the improvement.

The four drainage systems of the Cyrus H. McCormick Experimental Forest were surveyed from May through October, 1975 to determine the distribution and relative abundance of fish. More than 2,500 fish were collected. Game species, such as brook trout (Salvelinus fontinalis) large mouth bass (Micropterus salmoides), smallmouth bass (Micropterus dolomieui), and northern pike (Esox lucius), were present but not in large numbers.

White-tailed deer (Odocoileus virginianus) declined in the Superior National Forest of Minnesota between 1968 and 1974. In a 3,000 km2 area of the poorest habitat, deer were decimated. Contributing factors were severe winters, deteriorating habitat, and wolves. Wolves killed older deer, but insufficient fawns were available to replace them.

An application section provides tables for easy prediction of the proportion of oak stumps of various species having codominant-or-larger sprouts 5 years after clearcutting. A documentation section gives details of sprout development and equations for estimating sprouting of white, black, scarlet, post, and blackjack oaks.

Small mammals were studied shortly after a large wildfire in northeast Minnesota. An average of only 16 as many small mammals were in three forest communities that had burned than were in comparable unburned areas. The greatest reduction was for the red-backed vole. An analysis of population attributes suggests that deer mice immigrated to the burned area. Small mammal succession and their impact on reforestation is predicted.

Forest-range research or operational study designs should include the possible effects of weather and climate. This document describes the meteorological observational networks, the data available from them, and where the information is stored.

Contains the 32 papers presented at the 1977 symposium plus 23 contributed papers, 9 workshop summaries, and a general summary.

The North American grasslands are the most extensive and varied of all plant communities in North America. The grasslands are divided into eight subtypes and the wildlife resources, past and present, are discussed for each subtype. Objectives and practices of wildlife habitat management are discussed.

Summarizes and discusses the literature about the nesting habitat of the 26 cavity-nesting bird species found in the oak-hickory forest. Also discusses the potential influences of silvicultural practices and management alternatives.

The North Central Forest Experiment Station expanded its watershed research program in 1960 to include basic peatland studies. This paper reviews and summarizes basic principles developed from these studies of peatland hydrology, organic soil characteristics, and streamflow chemistry.