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Compaction Effects On Physical Properties On Three Forest Soils In The Upper Great Lakes Region
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Book Synopsis Compaction Effects on Physical Properties on Three Forest Soils in the Upper Great Lakes Region by : Michael James Mungoven
Download or read book Compaction Effects on Physical Properties on Three Forest Soils in the Upper Great Lakes Region written by Michael James Mungoven and published by . This book was released on 1996 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compaction Effects on Physical Properties of Two Forest Soils in the Upper Great Lakes by : Jessica Sternfels
Download or read book Compaction Effects on Physical Properties of Two Forest Soils in the Upper Great Lakes written by Jessica Sternfels and published by . This book was released on 2000 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Compaction on the Hydrologic Properties of Forest Soils in the Sierra Nevada by : Peter H. L. Cafferata
Download or read book The Effects of Compaction on the Hydrologic Properties of Forest Soils in the Sierra Nevada written by Peter H. L. Cafferata and published by . This book was released on 1983 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Compaction on Hydrologic Properties of Forest Soils in the Sierra Nevada by : Peter Herman Louis Cafferata
Download or read book The Effects of Compaction on Hydrologic Properties of Forest Soils in the Sierra Nevada written by Peter Herman Louis Cafferata and published by . This book was released on 1980 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the effects of a crawler tractor, a rubber-tired skidder, and a torsion suspension vehicle on several soil and hydrologic properties in the western Sierra Nevada Mountains of California. Four sites, with soil textural classes ranging from a loam to a loamy sand and elevations between 680 and 2180 m, were studied at three moisture contents. Compaction was monitored with a double probe nuclear densiometer and an air permeameter after 1, 3, 6, 10, 15, and 20 round trips. Density measurements were made at five different depths. Infiltration capacities were determined with a small, portable rainfall simulator. Soil core samples were taken to observe porosity and conductivity levels before and after disturbance. Compaction, or the change in bulk density, was significantly greater on the crawler tractor trails at all depths. When only the plots established in the outer positions of the trails were included, this distinction between vehicles could not be made. The crawler tractor generated more uniform compaction across its trails that either the torsion suspension vehicle or the rubber-tired skidder. The greatest change in bulk density for all the vehicles took place in the surface five centimeters. Infiltration capacities on the undisturbed sites were found to exceed predicted maximum precipitation rates. Mineral soil at the three higher elevation sites was very hydrophobic. This was thought to be due to the coating of soil particles with the metabolic products of fungal mycelia. The crawler tractor reduced infiltration capacities by 78 percent, while the torsion suspension vehicle and the rubber-tired skidder caused 67 percent decreases. Suspended sediment concentrations determined from runoff collected on the infiltration plots served as an erosion index for the skid trails. The crawler tractor trails had runoff with 40 percent higher sediment loads than that found on the trails of the other two skidders. Organic matter content was inversely correlated with the sediment levels. Air permeability readings showed that the three vehicles produced very similar reductions in macroporosity in the surface 2.5 cm layer as the number of trips increased. Approximately 75 percent of the decrease in macropore space occurred by six trips. The air permeameter provided a relatively good index of compaction. Porosity and conductivity levels determined from the soil core samples showed that machine differences did not exist in the track position. Macropore space was r2duced 43 percent and the conductivity decreased 80 percent. Site differences were much more evident than vehicle differences. Observations made after one over-wintering period showed that measureable recovery had not occurred.
Book Synopsis Soil Compaction on Forest and Range Lands by : Howard William Lull
Download or read book Soil Compaction on Forest and Range Lands written by Howard William Lull and published by . This book was released on 1959 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to review available information on soil compaction as related to soil and water conservation on forest and range lands.
Book Synopsis Proceedings of the ... Society of American Foresters National Convention by : Society of American Foresters. Convention
Download or read book Proceedings of the ... Society of American Foresters National Convention written by Society of American Foresters. Convention and published by . This book was released on 2000 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beyond 2001 written by and published by . This book was released on 2002 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving Forest Productivity for Timber by :
Download or read book Improving Forest Productivity for Timber written by and published by . This book was released on 1998 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 1987 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing Soil Compaction on Forest Inventory & Analysis Phase 3 Field Plots Using a Pocket Penetrometer by : Michael C. Amacher
Download or read book Assessing Soil Compaction on Forest Inventory & Analysis Phase 3 Field Plots Using a Pocket Penetrometer written by Michael C. Amacher and published by . This book was released on 2004 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil compaction is an important indicator of soil quality, yet few practical methods are available to quantitatively measure this variable. Although an assessment of the areal extent of soil compaction is included as part of the soil indicator portion of the Forest Inventory & Analysis (FIA) program, no quantitative measurement of the degree of soil compaction is made. We tested a small, lightweight pocket penetrometer that measures soil compression strength as a simple, quantitative measure of the degree of compaction of mineral soils under forested conditions. Soil compression strengths were significantly higher in compacted trails and areas than in adjacent undisturbed locations. In contrast, no significant difference in soil compression strength was found between rutted trails and adjacent undisturbed areas. A protocol is suggested for further pilot testing of this device as part of the soil indicator assessment. The main disadvantage of this device is that many of the compacted soils had compression strengths higher than the maximum measurable value of 4.5 tons/ft2. Despite this limitation, this device can rapidly and easily distinguish between compacted and uncompacted areas in the field. Time previously spent by field crews trying to identify qualitative evidences of compaction can instead be used to provide a quantitative measure of the degree of compaction, which would strengthen the analysis and interpretation of the soil quality indicator.
Download or read book Proceedings RMRS. written by and published by . This book was released on 1998 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Compaction and Removal of Forest Floor Litter on Soil Physical Properties by : Shirley Carol Solomon
Download or read book Effects of Compaction and Removal of Forest Floor Litter on Soil Physical Properties written by Shirley Carol Solomon and published by . This book was released on 1993 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Century of Forest and Wildland Watershed Lessons by : George G. Ice
Download or read book A Century of Forest and Wildland Watershed Lessons written by George G. Ice and published by Society of American Foresters.. This book was released on 2004 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings, Society of American Foresters 2000 National Convention, Washington, DC, November 16-20, 2000 by : Society of American Foresters. Convention
Download or read book Proceedings, Society of American Foresters 2000 National Convention, Washington, DC, November 16-20, 2000 written by Society of American Foresters. Convention and published by . This book was released on 2001 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sustaining Aspen in Western Landscapes by :
Download or read book Sustaining Aspen in Western Landscapes written by and published by . This book was released on 2001 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Current Environmental Engineering Summaries by : Engineering Information, Inc
Download or read book Current Environmental Engineering Summaries written by Engineering Information, Inc and published by . This book was released on 1993 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1995 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.