Treesearch

An experimental spray tower for the application of aerial sprays is described. The construction, operation, and preliminary calibration are detailed.

Long length cuttings (up to 60 inches) are obtainable in abundance from No. 2 Common oak lumber. Cutting for the maximum area of clear one face (ClF) parts 18 to 60 inches in length, we found that 46 percent of all the cuttings were 36 inches long or longer. The recovery of the long length cuttings did not reduce the overall yield of parts produced from the lumber. Computer simulation of conventional rough mill practices was based on a detailed analysis of 4,500 board feet of No. 2 Common oak lumber.

Early results of planting paper birch in old fields in Maine have not been very encouraging. Observations of seven plantations in a study established in 1959 by the Northeastern Forest Experiment Station showed low survival and slow growth over the first five growing seasons. Removing the sod in advance of planting gave better results than planting directly in the sod.

The retail Christmas tree market in Winston-Salem, N.C., was studied 3 years. Types of retailers and their sales are described. Best sales were made by dealers who had lots on heavily traveled streets in business districts, had ample parking facilities, advertised, and displayed their trees well.

Publication has been delayed until further notice. The publication will be available later, and will be advertised on our abstract sheet with a New Research Paper number.

Several multiple regression models for gypsy moth egg-mass density were developed from data accumulated in eastern New England between 1911 and 1931. Analysis of these models indicates that: (1) The gypsy moth population system was relatively stable in either the OUTBREAK phase or the INNOCUOUS one; (2) Several naturally occurring processes that could terminate the OUTBREAK phase are represented by the models, but they do not indicate mechanisms sufficient to change the system from the INNOCUOUS phase to the OUTBREAK one. Some of the implications arising from the above conclusions are...

Newly hatched gypsy moth larvae are morphologically and behaviorally adapted for airborne dispersal. The diel periodicity of both hatching and dispersal from the egg mass and photopositive behavior assure that larvae are in optimal position for dispersal when air turbulence is maximal at midday. The rate of larval activity depends upon ambient temperature and relative humidity (R2 = 0.77). The larvae continually trailed silk and did not feed upon reaching the foliage. Rather the larvae appeared predisposed to disperse and were readily dislodged by slight winds.

Evaluation of the factors influencing the selection of office furniture by nine state governments shows that quality and purchase price have the most important influence on the purchase decision. The intended use of the furniture and the purchasing regulations of the states were key f8CbrS in the use of wood furniture.

Calcium cyanamide, a nitrogenous fertilizer that also acts as an herbicide, was evaluated over a 3-year period for use in establishing planted yellow-poplar on an old-field site. Results of this study show that first and second year growth of yellow-poplar can be increased by nbroadcasting CaCN2 around the seedlings. When applied at rates of 400 to 500 pounds of nitrogen per acre, CaCN2 eliminated competing ground cover and supplied nitrogen to the seedlings that promoted vigor and rapid early growth.

Personal interviews with licensed fishermen in Central New York State were used to determine characteristics of fishermen who are willing to pay to fish. Willingness to pay was related to aspects of the fishing experience that most strongly influenced fishing enjoyment. Sixty-two percent of the respondents expressed a willingness to pay for a quality fishing experience. Study results suggest that much instability in the pay-lake fishing market may be due to the failure of individual operators to adequately consider all of the costs involved in providing quality fishing experiences.