Estimating Carbon and Nitrogen Pools in a Forest Soil: Influence of Soil Bulk Density Methods and Rock Content

2017 ◽  
Vol 81 (6) ◽  
pp. 1689-1696 ◽  
Author(s):  
Martin F. Jurgensen ◽  
Deborah S. Page-Dumroese ◽  
Robert E. Brown ◽  
Joanne M. Tirocke ◽  
Chris A. Miller ◽  
...  
Keyword(s):  
Bulk Density ◽  
Forest Soil ◽  
Soil Bulk Density ◽  
Carbon And Nitrogen ◽  
Nitrogen Pools ◽  
Density Methods ◽  
Soil Influence

Estimating forest soil bulk density using boosted regression modelling

2010 ◽  
Vol 26 (4) ◽  
pp. 516-528 ◽  
Author(s):  
S. S. M. Jalabert ◽  
M. P. Martin ◽  
J.-P. Renaud ◽  
L. Boulonne ◽  
C. Jolivet ◽  
...  
Keyword(s):  
Bulk Density ◽  
Forest Soil ◽  
Soil Bulk Density ◽  
Regression Modelling

scholarly journals Soil Bulk Density and Porosity Changes due to Ground-based Timber Extraction in the Hyrcanian Forest

2013 ◽  
Vol 5 (2) ◽  
pp. 263-269 ◽  
Author(s):  
Shoukuh SOLTANPOUR ◽  
Meghdad JOURGHOLAMI
Keyword(s):  
Bulk Density ◽  
Forest Soil ◽  
Soil Bulk Density ◽  
Forest Harvesting ◽  
Control Area ◽  
Soil Porosity ◽  
Percentage Increase ◽  
Hyrcanian Forest ◽  
Low Intensity ◽  
Porosity Reduction

Assessment and management of environmental impacts of forest harvesting activities, one of the main reasons is that its importance is increasing day by day. Skidding operations could lead to an increase in detrimental soil disturbance and soil surface compaction that reduced forest soil fertilities. The aim of this study was to investigate and quantify of forest soil compaction following the skidding operations with wheeled cable skidder. This study was carried out in compartment no. 311 and 319 in Gorazbon district in Kheyrud forest in Hyrcanian forest. This study was conducted in a completely randomized factorial design and changes in soil bulk density and porosity with the skidder traffic intensity such as low intensity (less than 3 passes), moderate (3 to 7 passes) and very large (more than 7 passes) and two depths of 0-10 and 10-20 cm of soil were measured. The results showed that with the increase of machine traffic, soil bulk density was increased but the largest percentage increase was observed in initial passes (less than 3 times). Soil bulk density at the depth 0-10 and 10-20 cm, was more than the control area by 21.2 and 6.5 percent, respectively. Soil porosity percentage at wheel rut was decreased comparing to the control area and this reduction in the 0-10 cm depth was greater than 10-20 cm soil depth. The most of the porosity reduction were occurred in the low intensity traffic and increase in skidder traffic has shown less effect on reducing soil porosity.

Does Sampler Size Affect Southeastern Piedmont Forest Soil Bulk Density Estimation?

2018 ◽  
Vol 49 (6) ◽  
pp. 701-707
Author(s):  
T. Adam Coates ◽  
Thomas A. Waldrop ◽  
Victor B. Shelburne ◽  
Hoke S. Hill
Keyword(s):  
Bulk Density ◽  
Forest Soil ◽  
Density Estimation ◽  
Soil Bulk Density

A comparison of rubber-tyred and steel-tracked skidders on forest soil physical properties

Soil Research ◽  
2003 ◽  
Vol 41 (6) ◽  
pp. 1063 ◽  
Author(s):  
G. J. Sheridan
Keyword(s):  
Hydraulic Conductivity ◽  
Bulk Density ◽  
Forest Soil ◽  
Penetration Resistance ◽  
Soil Bulk Density ◽  
Saturated Hydraulic Conductivity ◽  
Rainfall Simulation ◽  
Silty Clay ◽  
Log Skidding ◽  
Experimental Treatments

Compaction of a silty clay loam forest soil was compared for 2 types of log-skidding equipment, a rubber-tyred skidder and a flexible-steel-tracked skidder. Experiments involved the loaded skidders traversing marked laneways at zero, 2, 4, and 10 passes. Compaction was quantified in terms of 3 parameters: (1) bulk density to 25 cm depth measured gravimetrically, (2) penetration resistance using a field penetrometer, and (3) saturated hydraulic conductivity using a field rainfall simulator. Results showed no substantial difference in soil bulk density between the experimental treatments, regardless of skidder type or number passes. Penetration resistance of the traversed laneways was significantly higher than the surrounding undisturbed areas; however, there was no difference between skidder type. Rainfall simulation showed that the saturated hydraulic conductivity of all treatments was strongly reduced by trafficking, although this did not differ with skidder type. The results from this study highlight the dangers in assuming that reduced machine static ground pressures will automatically lead to reduced soil impacts. It is important to note that while this study did not find differences between the 2 skidder types when operated in a similar manner, differences in the operation of the two skidders may also influence impacts on soil properties.

scholarly journals Carbon and nitrogen pools and mineralization rates in boreal forest soil after stump harvesting

2016 ◽  
Vol 377 ◽  
pp. 61-70 ◽  
Author(s):  
Lilli Kaarakka ◽  
Riitta Hyvönen ◽  
Monika Strömgren ◽  
Marjo Palviainen ◽  
Tryggve Persson ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Forest Soil ◽  
Carbon And Nitrogen ◽  
Nitrogen Pools

scholarly journals Effect of the skid trail cross section and horizontal alignment on forest soil physical properties

2017 ◽  
Vol 63 (No. 4) ◽  
pp. 161-166
Author(s):  
Yazarlou Hossein ◽  
Parsakhoo Aidin ◽  
Habashi Hashem ◽  
Soltauninejad Soltan Ali
Keyword(s):  
Bulk Density ◽  
Forest Soil ◽  
Cross Section ◽  
Soil Bulk Density ◽  
Middle Part ◽  
Soil Porosity ◽  
Vertical Alignment ◽  
Horizontal Alignment ◽  
Significant Difference ◽  
The Cross

Horizontal alignment and cross section characteristics of a skid trail in a ground-based skidding system including curves, wheel ruts and cross slope can impact on the forest soil. In this study the measurement of cross section and vertical alignment of skid trail in Bahramnia forestry plan was done using a levelling instrument. Horizontal alignment of skid trail including straight routes and curves was taken using polar methods. A 3D map of skid trail was produced in AutoCAD Civil3D software. Soil bulk density was measured after sampling the soil with a core sampler. Results showed that in straight routes, soil bulk density increased by increasing the cross slope of skid trail. Moreover, soil porosity decreased with the increasing cross slope. There was a significant difference between cross slopes in soil moisture. On curves, maximum bulk density occurred when the cross slope was 10%. Findings about soil porosity and moisture on curves of skid trails were similar to those of straight routes. Based on our findings, soil bulk density in wheel ruts was significantly lower than that in the middle part of skid trail. Soil bulk density in the silty soil texture of studied skid trails was a little more than ideal bulk density, so it cannot affect and restrict root growth.

MEASUREMENT AND PALEOCLIMATIC SIGNIFICANCE OF SOIL BULK DENSITY FOR LOESS IN EXTREME ARID REGION

2010 ◽  
Vol 30 (2) ◽  
pp. 127-132
Author(s):  
Jinbo ZAN ◽  
Shengli YANG ◽  
Xiaomin FANG ◽  
Xiangyu LI ◽  
Yibo YANG ◽  
...  
Keyword(s):  
Bulk Density ◽  
Arid Region ◽  
Soil Bulk Density ◽  
Paleoclimatic Significance
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