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Forest Science and Technology Volume 20, 2024 - Issue 1
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Articles

Productivity and Costs of Mechanized Skidding operations at Sao Hill Forest Plantation, Tanzania

Gilberth Prosper TembaDepartment of Forest Engineering and Wood Sciences, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania.Correspondence[email protected]
ORCID Iconhttps://orcid.org/0009-0006-8296-0882View further author information
ORCID Icon,
Ernest William MauyaDepartment of Forest Engineering and Wood Sciences, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania.View further author information
&
George Ansigar MigungaDepartment of Forest Engineering and Wood Sciences, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania.View further author information
Pages 91-103 | Received 09 Aug 2023, Accepted 20 Dec 2023, Published online: 28 Dec 2023

Figures & data

Figure 1. Map of SHFP showing the compartment understudy.

Figure 1. Map of SHFP showing the compartment understudy.

Figure 2. Sampling procedure used to select forest compartment understudy.

Figure 2. Sampling procedure used to select forest compartment understudy.

Table 1. GS descriptions

Figure 3. GS time distribution for each work element at a mean distance of 59.2 m and slope of 13.5%.

Figure 3. GS time distribution for each work element at a mean distance of 59.2 m and slope of 13.5%.

Table 2. Skidding summary statistics

Table 3. GS operational costs

Figure 4. Residual plots for all GS work elements and total productive time.

Figure 4. Residual plots for all GS work elements and total productive time.

Table 4. GS time consumption model for individual work elements and total productive time.

Figure 5. Relationship between observed and predicted GS time on various work elements

Figure 5. Relationship between observed and predicted GS time on various work elements

Figure 6. Residual and scatter plots for GS productivity and costs models

Figure 6. Residual and scatter plots for GS productivity and costs models

Figure 7. a. Error bars show the performance of productivity and cost models on various distances.

b. Error bars show the performance of productivity and cost models on various slopes.

Figure 7. a. Error bars show the performance of productivity and cost models on various distances.b. Error bars show the performance of productivity and cost models on various slopes.

Table 5. Performance of productivity and cost models on various distances and slope classes.

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