Treesearch

Summarizes white pine blister rust research in the Lake States and present status of knowledge. Important microclimatic relations are described. Antibiotics are not effective, whereas pruning provides some control. Genetic resistance shows much promise but may be complicated by pathogenic races. The effectiveness of ribes eradication is open to question.

In three parts, classifies the upland vegetation into four community types; describes the measurements of browse and gives yields by different species; and describes the relation of small mammal populations to vegetative community types.

This 26th annual report shows that 1971 Lake States pulpwood production fell 6 percent. Wood inventory reductions were a major cause of the decline. Canada is losing importance as a pulpwood supplier to Minnesota, Wisconsin, and Michigan.

Describes a set of local net merchantable tree-volume equations for four regions of Wisconsin Suitable for use on a digital computer

Describes the currently recommended methods for controlling Lophodermium needlecast in Scotch pine plantations

Describes the productivity of selected aspen pulpwood loggers in northern Minnesota. The most important factors affecting productivity were the ratio of harvested trees per acre to total trees per acre, harvested volume per acre, and the spacing of nonharvested trees

An increase in forest utilization can be brought about by chipping logging residues or whole trees in the woods and removing the bark and foliage later. Because portable whole-tree chippers are now commercially available, methods must be developed for segregating bark and foliage from the chips. This paper discusses foliage removal results obtained from testing two methods of directing an airflow transverse to chips, bark, and foliage. The species tested were aspen, sugar maple, jack pine, red pine, balsam fir, and loblolly pine. Removing leaves was more successful than removing needles....

Site requirements of 25-year-old plantation-grown black walnut on floodplains in southern Illinois were studied. Depth to a gravel layer was the only soil factor that significantly influenced height growth. There was a relationship between internal soil drainage and height growth.

Reports the various applications of prescribed burning in the Lake States during 1971. Presents average costs for each purpose and reasons for cost differences.

This 27th annual report shows 1972 Lake States pulpwood production to be 4.3 million cords, up 7 percent from 1971. Pulpwood harvests increased in all species except pine and tamarack.