Effect of organic matter on soil properties of forest roads | ||
| تحقیقات جنگل و صنوبر ایران | ||
| Article 7, Volume 22, Issue 1, April 2014, Pages 65-73 PDF (180.48 K) | ||
| Document Type: Research article | ||
| DOI: 10.22092/ijfpr.2013.9052 | ||
| Authors | ||
| Shojaat Babapour1; Ehsan Abdi* 2; Baris Majnounian3; Ghavamoddin Zahedi Amiri4 | ||
| 1M.Sc. Student, Department of Forestry, Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| 2Assistant Professor, Department of Forestry, Faculty of Natural Resources, University of Tehran, Karaj, Iran. | ||
| 3Professor, Department of Forestry, Faculty of Natural Resources, University of Tehran, Karaj, Iran. | ||
| 4Associate Professor, Department of Forestry, Faculty of Natural Resources, University of Tehran, Karaj, Iran. | ||
| Abstract | ||
| Knowledge on physical and mechanical properties of soil is necessary for forest road construction and in turn for optimal forest management. Avoiding a mixture of organic matter with soil is considered as being principal in constructing forest roads which is, however, often neglected. Therefore, quantifying the consequences of such mixture can help optimizing the high economic and environmental costs associated with road constructions. The aim of this study was to assess if and how the level of organic matter affects the physical and mechanical properties of soil on forest roads. To this aim, soil samples were collected by profile excavation. Organic matter was collected from residual and litter layer of forest floor. Different mixtures of organic matter with soil were tested (0%, 5%, 10% and 15% of weight), followed by Atterberg limits and CBR tests conducted on the samples. Results showed that increasing organic matter content would increase plastic and liquid limits, which in turn increases the CBR values. Results also showed a significant negative effect of organic matter on soil engineering properties. Therefore, it necessitates a separation between the organic matter and soil during forest road construction. | ||
| Keywords | ||
| Atterberg limits; CBR; forest road construction; soil properties | ||
| References | ||
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