The establishment of forest plantations in boreal zones Mongolia is important for wood production as well carbon dioxide fixation. present study aims to elucidate the juvenile properties (basic density, modulus elasticity [MOE], rupture [MOR], and compressive strength parallel grain) plantation-grown Pinus sylvestris promote plantations. In addition, effect radial growth rate on was also evalua...

Western Iberia has recently shown increasing frequency of drought conditions coupled with heatwave events, leading to exacerbated limiting climatic conditions for plant growth. It is not clear to what extent wood growth and density of agroforestry species have suffered from such changes or recent extreme climate events. To address this question, tree-ring width and density chronologies were bui...

The effect of growth rate on weight density and strength properties of three Norway spruce cutting clones growing on three different sites in different geographic locations was studied. The purpose was to follow variation in wood physical and mechanical properties and in quality between fast-growing clones grown in environments differing in nutritional and soil properties and climate within the...

Intensive management may adversely affect lumber yield and quality by increasing knot size and creating a more conical stem form with a greater average rate of taper. This study was initiated to examine the impact of management on simulated lumber yield and quality. Stem diameter and branch size and location of 223 Pseudotsuga menziesii (Mirb.) Franco (Douglas fir) stems ranging in age from 5 t...

The development of anatomical, hydraulic and biomechanical properties in Scots pine (Pinus sylvestris L.) stems aged 7 to 59 years was followed. The hydraulic diameter and length of tracheids increased with age to a maximum at 15 and 35 years, respectively. Number of tracheids per unit of sapwood area decreased with age to a minimum of 500-600 tracheids mm(-2). Variations in specific hydraulic ...

OBJECTIVE To examine conceptual models of response shift, research design, and internal validity issues in the context of longitudinal outcome research using self-report measures such as pediatric quality of life. METHODS Growth modeling was introduced and illustrated using a previously published data set (Clay, Wood, Frank, Hagglund, & Johnson, 1995) of adjustment in children with juvenile r...

Reclaiming Futures is a five-year, $21 million initiative funded by The Robert Wood Johnson Foundation. The initiative addresses the reality that both substance abuse and prosecution for drug-related charges among juvenile offenders has undergone a tremendous surge in the last five years, yet systems of care to address these interrelated issues have been slower to evolve. Reclaiming Futures add...

The pine wood nematode, Bursaphelenchus xylophilus, is the causal agent of pine wilt disease. This nematode has two developmental forms in its life cycle; i.e., the propagative and dispersal forms. The former is the form that builds up its population inside the host pine. The latter is specialized for transport by the vector. This form is separated into two dispersal stages (third and fourth); ...

Abstract Sex has a significant effect on various traits among dioecious plants. In this analysis of the sex radial growth and wood density numerous 20-year-old trees Populus deltoides growing in common garden, male performed better than females growth, but did not significantly affect density. Growth rate were weakly negatively correlated. selection is also critical for controlling seed-hair po...

Concern over pocket gopher damage to conifer seedlings is increasing rapidly in the northwestern United States. The evolution of the pocket gopher (Thomomys spp.) has resulted in an animal that occurs throughout northwest forested areas and responds to site disturbances by increasing numbers and distribution. Pocket gophers kill or slow growth of conifer seedlings. More extensive logging, wildf...