Treesearch

Most of the intensive grazing on forested land in the Missouri Ozarks is occuring on land with a low potential for growing commercial timber.

Presents stand volume equations and a stand volume table for shortleaf pine in Missouri and describes their development and application.

Nursery seedbed density of 3-0 green ash, which ranged from 4 to 36 trees per square foot at Carlos Avery Nursery, Forest Lake, Minn., had a marked effect on caliper, height, fresh weight, and percent and amound of plantable stock. The highest number of good-quality trees was produced at a density of 12.5 trees per square foot.

Our Black Walnut tree (Juglans nigra L.) has always had top rank among trees in America. It claims its rank on two counts: it is one of our major nut trees; and its wood has a beauty and utility that few other trees can match.

A 6-year exposure test of three styles of siding made from nine hardwoods and given three treatments showed that full-length yellow-poplar vertical tongue-and-groove siding dip-treated in a water-repellent preservative performed best.

Characteristics of a slime-producing bacterium isolated from living and dead gypsy moth larvae were determined. The bacterium was found to be a motile, gram-negative rod, which fermented glucose, but not lactose. It was oxidase-negative, hydrolyzed urea, deaminated phenylalanine and produced H2S. These characteristics are common to several members of the genus Proteus. In addition to the unique feature of slime production, a biochemical comparison with other members of the genus showed that it differed markedly from described species of Proteus; thus the new species Proteus myxofaciens was...

The relationship between insect density and subsequent defoliation is usually important among the many factors involved in deciding if, when, and where to take control action against a defoliator such as the gypsy moth. Unfortunately, the proportion of the foliage that will be removed by a defoliator in any given place and year depends not only upon the number of insects that are present, but also upon a number of other variables. Thus a particular insect density does not determine a particular defoliation level. Rather, an array of defoliation levels may result from that density; and all...

Aerial application of herbicides to poor hardwood stands shows promise of being an effective aid in converting stands of low-grade hardwoods to conifers in West Virginia. Many of the sites now occupied by low-grade hardwoods are incapable of producing quality hardwoods - even under good management - and are generally much better suited to certain conifers, particularly the native pine.

The markets for hardwood lumber are now strong, and sawmill profits are increasing. But this favorable market-price situation is the exception rather than the rule. Usually hardwood sawmill operators are confronted with ever-decreasing profit margins. During the past decade, while lumber prices have remained relatively constant, most logging and sawmilling costs have increased from 30 to 45 percent

In the 1950s a cooperative study was made to obtain accurate growth information about the spruce-fir forests of northern Maine and New Hampshire. The results of that study were published in 1961.