| Autor: |
J. W. Leech, J. F. O'Hehir |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Australian Forestry. 60:196-201 |
| ISSN: |
0004-9158 |
| DOI: |
10.1080/00049158.1997.10676142 |
| Popis: |
Summary Line intersect sampling is applied in various aspects of forest management. One of the more common applications is to estimate the quantity of logging residue remaining on the ground following harvesting operations. The estimate of residue quantity can be used to develop residue models for yield prediction and to monitor harvesting operations to ensure prescribed utilisation levels are achieved. The application of line intersect sampling to quantifying logging residue has not always been as efficient as may be desired. Alternatives to the traditional application of the method have been developed using regular polygons with odd numbers of sides and circular sample lines. These shapes are more robust in overcoming the bias in the orientation of logging residue. Monte Carlo simulation was used to develop a model to predict the sample size required to achieve a specified precision of the estimate of residue for nine-sided polygonal (nonagonal) sample lines. Budget functions derived from time studies o... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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