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Book Soil Hydraulic and Physical Properties as Affected by Logging Management

Download or read book Soil Hydraulic and Physical Properties as Affected by Logging Management written by Langston A. Simmons and published by . This book was released on 2014 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Former studies have shown that once compacted, forest soils often recover slowly (many decades) to pre-disturbed levels for soil properties such as bulk density or penetrometer resistance. Runoff and soil erosion from forest lands increases due to effects from this soil compaction. Increased carbon sequestration is expected from forest land; however, increased runoff and erosion will negatively affect carbon sequestration in the soil. As climate change occurs, more intense rain may fall which will create challenges with runoff and erosion from compacted sites. This study was conducted to evaluate the effects of selected harvesting techniques on soil physical and hydraulic properties. The effects of logging roads, log landing areas, and logged areas on water retention, saturated hydraulic conductivity (KSat), and bulk density were investigated on harvested sites within the Mark Twain National Forest in Callaway County, Missouri, USA on a moderately well-drained Keswick soil (fine, smectitic, mesic Aquertic Chromic Hapludalfs). Soil cores (7.6 cm by 7.6 cm) were removed in four 10-cm depth increments in June and were evaluated for saturated hydraulic conductivity, soil water retention, pore-size distributions, and bulk density. Saturated hydraulic conductivity was measured for each core sample using a constant head permeameter, or the falling head method for samples with low values. For the water retention measurements, soil cores were saturated and water retention measurements were recorded for 0.0, -0.4, -1.0, -2.5, -5.0, -10.0 and - 20.0 kPa readings. Soil aggregate samples were used for the -33 and -100 kPa water retention readings and samples passed through a 2.0 mm sieve was used for the -1,500 kPa water retention reading. The soil bulk density was also determined for the soil core samples. Pore size distributions were estimated using the water retention data from each sample. Bulk density was significantly higher (P0.01) for the logging road and log landing areas compared to the logged areas. This was attributed to the higher levels of soil compaction in the more trafficked areas of the site. Significant interactions (P

Book Hydraulic Research in the United States

Download or read book Hydraulic Research in the United States written by and published by . This book was released on 1966 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Some Effects of Logging and Slash Burning on Physical Soil Properties in the Corvallis Watershed Classic Reprint

Download or read book Some Effects of Logging and Slash Burning on Physical Soil Properties in the Corvallis Watershed Classic Reprint written by C T Dyrness and published by Forgotten Books. This book was released on 2018-03-25 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Some Effects of Logging and Slash Burning on Physical Soil Properties in the Corvallis Watershed Other workers in the Douglas-fir region have explored the influence Of logging and slash burning on soils, using somewhat different approaches to the problem. Recently, Tarrant studied the effect of slash burning on rate of water percolation, Size of pore spaces, and bulk density of soils in two separate He found that severe burning lowers the rate of moisture movement, while light burning does not seriously alter the soil in this respect. He showed further that severe burning occurred on less than 5 percent of the total logged and burned area included in his study. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Book Forest Soils

    Forest Soils

    Book Details:
  • Author : Khan Towhid Osman
  • Publisher : Springer Science & Business Media
  • Release : 2013-12-12
  • ISBN : 3319025414
  • Pages : 222 pages

Download or read book Forest Soils written by Khan Towhid Osman and published by Springer Science & Business Media. This book was released on 2013-12-12 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest soil characteristics are not only unique but their interpretation also differs from cropland soils. Just as there are diverse forest types, there are many soil variants that need different management. Today, forest plantations are being intensively managed for profitable timber, pulpwood and energy production. Site selection, species selection, site productivity evaluation, silvicultural treatments, and soil amendments need crucial soil information. This book provides a comprehensive overview of the physical, chemical and biological properties of forest soils and their implications on forest vegetation. Topics discussed include: major forest types of the world and their associated soils; forest biomass and nutrient dynamics; organic matter turnover and nutrient recycling; forest soil disturbance; forest soil and climate change; and forest soil management and silvicultural treatments.

Book Mycorrhizal Mediation of Soil

Download or read book Mycorrhizal Mediation of Soil written by Nancy Collins Johnson and published by Elsevier. This book was released on 2016-11-03 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mycorrhizal Mediation of Soil: Fertility, Structure, and Carbon Storage offers a better understanding of mycorrhizal mediation that will help inform earth system models and subsequently improve the accuracy of global carbon model predictions. Mycorrhizas transport tremendous quantities of plant-derived carbon below ground and are increasingly recognized for their importance in the creation, structure, and function of soils. Different global carbon models vary widely in their predictions of the dynamics of the terrestrial carbon pool, ranging from a large sink to a large source. This edited book presents a unique synthesis of the influence of environmental change on mycorrhizas across a wide range of ecosystems, as well as a clear examination of new discoveries and challenges for the future, to inform land management practices that preserve or increase below ground carbon storage. - Synthesizes the abundance of research on the influence of environmental change on mycorrhizas across a wide range of ecosystems from a variety of leading international researchers - Focuses on the specific role of mycorrhizal fungi in soil processes, with an emphasis on soil development and carbon storage, including coverage of cutting-edge methods and perspectives - Includes a chapter in each section on future avenues for further study

Book Properties and Management of Soils in the Tropics

Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.

Book General Technical Report Southern Research Station

Download or read book General Technical Report Southern Research Station written by and published by . This book was released on 1995 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Soils of Tropical Forest Ecosystems

Download or read book Soils of Tropical Forest Ecosystems written by Andreas Schulte and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: An understanding of the characteristics and the ecology of soils, particularly those of forest ecosystems in the humid tropics, is central to the development of sustainable forest management systems. The present book examines the contribution that forest soil science and forest ecology can make to sustainable land use in the humid tropics. Four main issues are addressed: characteristics and classification of forest soils, chemical and hydrological changes after forest utilization, soil fertility management in forest plantations and agroforestry systems as well as ecosystem studies from the dipterocarp forest region of Southeast Asia. Additionally, case studies include work from Guyana, Costa Rica, the Philippines, Malaysia, Australia and Nigeria.

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Thesaurus of Water Resources Terms

Download or read book Thesaurus of Water Resources Terms written by United States. Bureau of Reclamation and published by . This book was released on 1971 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Soil Physical Measurement and Interpretation for Land Evaluation

Download or read book Soil Physical Measurement and Interpretation for Land Evaluation written by Keppel Coughlan and published by CSIRO PUBLISHING. This book was released on 2002-11-26 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil physical measurements are essential for solving many natural resource management problems. This operational laboratory and field handbook provides, for the first time, a standard set of methods that are cost-effective and well suited to land resource survey. It provides: *practical guidelines on the soil physical measurements across a range of soils, climates and land uses; *straightforward descriptions for each method (including common pitfalls) that can be applied by people with a rudimentary knowledge of soil physics, and *guidelines on the interpretation of results and integration with land resource assessment. Soil Physical Measurement And Interpretation for Land Evaluation begins with an introduction to land evaluation and then outlines procedures for field sampling. Twenty detailed chapters cover pore space relations, water retention, hydraulic conductivity, water table depth, dispersion, aggregation, particle size, shrinkage, Atterburg limits and strength. The book includes procedures for estimating soil physical properties from more readily available data and shows how soil physical data can be integrated into land planning and management decisions.