Converting Hardwoods on Poor Sites to White Pine by Planting and Direct Seeding


Book Description

Until recently, conversion of hardwood stands on poor sites to white pine (Pinus strobus L.) was limited mostly to natural white pine reproduction released from a hardwood overstory, either by killing the hardwoods or by removing them through a timber sale. However, in our effort to increase the returns from poor sites in West Virginia (oak site index 45 to 60) we have been introducing white pine where advanced natural white pine is scarce or absent. The results of several conversion studies completed during the past 6 years and the results of pertinent research conducted elsewhere are summarized and reported here.




The Assessment and Modeling of Regeneration Dynamics for Eastern White Pine (Pinus Strobus L.)


Book Description

This study represents an analysis of regeneration processes for eastern white pine (Pinus strohus L.). The objective is to develop an integrated approach to evaluate the influence of factors that, alone and in combination, determine regeneration outcomes. This study is composed of three sections. The first chapter is a literature review of white pine regeneration dynamics. The purpose is to present a process for understanding the regeneration process of a single species and present a conceptual approach to integrated evaluation of influential variables. Six interrelated ecological factors (seed tree density, competition, disturbance, seedbed conditions, soils, and damage agents) were identified and their impact on the regeneration process is evaluated. A conceptual model of the integration approach and two examples of how this approach can be utilized in assessing regeneration operations are presented.










Adaptation of Eastern White Pine Provenances to Planting Sites


Book Description

Eastern white pine provenances from the extreme limits of its natural range are changing from above- and below-average stability to average stability for height growth with increasing age. The regression method is useful for evaluating the stability of provenance to planting sites. The same general conclusions are reached for the performance of provenances at different planting sites from the regression method as from the relative difference method.







Natural Regeneration of White Pine in Northwestern Ontario


Book Description

This report describes the results of a reconnaissance-level field study to determine the occurrence of natural white pine regeneration on three areas in northwestern Ontario. The areas included Devon Township in a 90-year-old mixedwood stand containing white pine, red pine, and trembling aspen; Sibley Peninsula in a 140-year-old white pine stand 33 years after an experimental harvesting trial; and Greenwood Lake under a fully stocked 200-year-old white pine stand, in adjacent 10-year-old clearcuts planted or seeded to jack pine, and under a partially cut, naturally regenerating white pine stand 10 years after cutting.