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Drying Hardwood Lumber focuses on common methods for drying lumber of different thickness, with minimal drying defects, for high quality applications. This manual also includes predrying treatments that, when part of an overall quality-oriented drying system, reduce defects and improve drying quality, especially of oak lumber. Special attention is given to drying white wood, such as hard maple and ash, without sticker shadow or other discoloration. Several special drying methods, such as solar drying, are described, and proper techniques for storing dried lumber are discussed. Suggestions are provided for ways to economize on drying costs by reducing drying time and energy demands when feasible. Each chapter is accompanied by a list of references. Some references are cited in the chapter; others are listed as additional sources of information.
In the Qing period (1644–1912), China's population tripled, and the flurry of new development generated unprecedented demand for timber. Standard environmental histories have often depicted this as an era of reckless deforestation, akin to the resource misuse that devastated European forests at the same time. This comprehensive new study shows that the reality was more complex: as old-growth forests were cut down, new economic arrangements emerged to develop renewable timber resources. Historian Meng Zhang traces the trade routes that connected population centers of the Lower Yangzi Delta to timber supplies on China's southwestern frontier. She documents innovative property rights systems and economic incentives that convinced landowners to invest years in growing trees. Delving into rare archives to reconstruct business histories, she considers both the formal legal mechanisms and the informal interactions that helped balance economic profit with environmental management. Of driving concern were questions of sustainability: How to maintain a reliable source of timber across decades and centuries? And how to sustain a business network across a thousand miles? This carefully constructed study makes a major contribution to Chinese economic and environmental history and to world-historical discourses on resource management, early modern commercialization, and sustainable development.
A brief history of plantations. Environmental issues. Plantations and biodiversity. Water matters. Plantations and the soil. Pests: plantations' achilles' heel? Genetically modified trees: opportunity or treath? Plantations and global warming. Social issues. Employement: a contested balance sheet. Land tenure and conflict. Economic issues. Spiralling demand. Incentives and subsidies. Economies of scale. Costing the earth.
During the second half of the twentieth century, the forest industry removed more than 300 billion cubic feet of timber from southern forests. Yet at the same time, partnerships between public and private entities improved the inventory, health, and productivity of this vast and resilient resource. A comprehensive and multilayered history, Forestry in the U.S. South explores the remarkable commercial and environmental gains made possible through the collaboration of industry, universities, and other agencies. This authoritative assessment starts by discussing the motives and practices of early lumber companies, which, having exhausted the forests of the Northeast by the turn of the twentieth century, aggressively began to harvest the virgin pine of the South, with production peaking by 1909. The rapidly declining supply of old-growth southern pine triggered a threat of timber famine and inspired efforts to regulate the industry. By mid-century, however, industrial forestry had its own profit incentive to replenish harvested timber. This set the stage for a unique alliance between public and private sectors, which conducted cooperative research on tree improvement, fertilization, seedling production, and other practices germane to sustainable forest management. By the close of the 1990s, concerns about an inadequate timber supply gave way to questions about how to utilize millions of acres of pine plantations approaching maturity. No longer concerned with the future supply of raw material and facing mounting global competition the U.S. pulp and paper industry consolidated, restructured, and sold nearly20 million acres of forests to Timber Investment Management Organizations (TIMOs) and Real Estate Investment Trusts (REITs), resulting in an entirely new dynamic for private forestry in the South. Incomparable in scope, Forestry in the U.S. South spotlights the people and organizations responsible for empowering individual forest owners across the region, tripling the production of pine stands and bolstering the livelihoods of thousands of men and women across the South.
With relative humidity and temperature data from the National Oceanic and Atmospheric Administration, the average equilibrium moisture content for each month of the year was calculated for 262 locations in the United States and 122 locations outside the United States. As an aid for storage of kiln-dried lumber, a graph is presented for determining the reduction in equilibrium moisture content that results from heating air in an enclosed storage space above the temperature of the outside air.
A chance encounter with a fallen tree started professor and amateur woodworker Samuel Sherrill thinking: Is there a better way to stretch our precious natural resources? The question led to the writing of Harvesting Urban Timber. Sherrill explains how to identify potential urban timber, how to safely harvest it and convert it into useful lumber.
1 Plantation forests and biodiversity: Oxymoron or opportunity? Forests form the natural vegetation over much of the Earth’s land, and they are critical for the survival of innumerable organisms. The ongoing loss of natural forests, which in some regions may have taken many millennia to develop, is one of the main reasons for the decline of biodiversity. Preventing the further destruction of forests and protecting species and ecosystems within forests have become central issues for environmental agencies, forest managers, and gove- ments. In this di?cult task science has an important role in informing policy and management as to how to go about this. So how do industrial and other pl- tation forests ?t into this? Plantation forests, comprised of rows of planted trees that may be destined for pulp or sawmills after only a few years of growth, appear to have little to c- tribute to the conservation of biodiversity. Yet there is more to this than meets the eye (of the casual observer), and there are indeed numerous opportunities, and often untapped potential, for biodiversity conservation in plantation forestry. With plantation forests expanding at a rate of approximately three million hectares per year, it is crucial to understand how plantations can make a positive contribution to biodiversity conservation and how the potentially negative impacts of this land use can be minimised. That is the topic of this book.
In Pan's Travail, J. Donald Hughes examines the environmental history of the classical period and argues that the decline of ancient civilizations resulted in part from exploitation of the natural world. Focusing on Greece and Rome, as well as areas subject to their influences, Hughes offers a detailed look at the impact of humans and their technologies on the ecology of the Mediterranean basin. He also compares the ancient world's environmental problems to those of other eras and discusses attitudes toward nature expressed in Greek and Latin literature.