Treesearch

As part of its forest recreation research, the Northeastern Forest Experiment Station in the summer of 1964 made a survey of all privately owned campgrounds in New Hampshire, in cooperation with the New Hampshire State Planning Project. The purpose of the survey was to find out what characteristics of campgrounds - and campground management - lead to success.

Includes 627 items constituting virtually all the technical literature dealing with the ecology, silviculture, and timber products of Juglans. Material is arranged in alphabetical order by author. An index lists the items by subject matters.

Oak-history forests on the poorest sites in the Upper Mississippi Valley have both low productivity and little esthetic appeal. A mixture of the native evergreen redcedar would add bearty and increase wildlife values.

Measurement of streamflow from small watersheds on the Fernow Experimental Forest at Parsons, West Virginia was begun in 1951. Stream-gaging stations are now being operated on 9 watersheds ranging from 29 to 96 acres in size; and 91 watershed-years of record have been collected. To determine how accurately streamflow is being measured at these stations, several of the important factors that influence the accuracy of the records have been studied.

The watersheds of the Hubbard Brook Experimental Forest in the White Mountains of New Hampshire are among the few small gaged watersheds for which continuous winter streamflow records are obtained while deep snow covers the area. Records show that a remarkably steady flow of between 0.006 and 0.025 area-inch of water per day leaves the watershed in spite of snow depths up to 6 feet and air temperatures often continuously below 10ºF. Wisler and Brater (1959) stated that streamflow of about 0.01 area-inches/day (0.025 cm/day) arises from groundmelt, which is defined as melt of snow by heat...

The descriptions of all forms from eggs to adults of conotrachelus naso LeConte, C. carinifer Casey, C. posticatus Boheman, as well as keys for mature larvae, pupae, and adults, are presented.

The area presently designated as the Denbigh Experimental Forest was established in 1931 as a location where large-scale afforestation could be tested in the Northern Great Plains. More than 40 species of trees have since been planted on 270 acres within the forest, which is located at an elevation of 1,486 feet in the sand hills of McHenry County in north-central North Dakota. The major soil type there is a Valentine fine sand. The early planting, begun in 1933, was completed in 1940. Ponderosa pine (Pinus ponderosa Laws.), one of the most extensively planted species, was used in 48...

The white-pine cone beetle (Conophthoras coniperda ( Schwarz ) ) can cause extensive damage to cones of eastern white pine (Pinus strobus L.) and can severely hamper natural reproduction of this species (Graber 1964). This insect also will be a potential pest of seed orchards for the production of genetically superior seed if and when such orchards are established. It may be assumed that in certain areas, and for certain purposes, these seed orchards will contain white pine species that are exotic to the Northeast, or are hybrids of P. strobus and exotic species. Knowledge about the...

Virginia pine (Pinus virginiana Mill.) normally develops such dense stands on suitable sites, as in old fields, that thinning would seem to be a good silvicultural practice. Seedling stands may have 10,000 or more stems per acre, and stands 20 years old may still contain 2,000 trees. Even though rapid differentiation of crowns occurs in this intolerant species, resulting in early suppression of many stems and much mortality, thinning still might be expected to favor the development of greater volumes or more valuable products.