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Title: Comparison of mechanized systems for thinning Ponderosa pine and mixed conifer stands

Author: Hartsough, Bruce R.; McNeel, Joseph F.; Durston, Thomas A.; Stokes, Bryce J.;

Date: 1994

Source: 1994 international winter meeting sponsored by the American Society of Agricultural Engineers. ASAE Pap. 94-7513. St. Joseph, MI; American Society of Agricultural Engineers. 20 p.

Publication Series: Miscellaneous Publication

Description: We studied three systems for thinning pine plantations and naturally-regenerated stands on the Stanislaus National Forest, California. All three produced small sawlogs and fuel chips. The whole tree system consisted of a feller buncher, skidder, stroke processor, loader and chipper. The cut-to-length system included a harvester, forwarder, loader and chipper. A hybrid system combined a feller buncher and harvester to produce bunches of small whole trees for fuel, and bunches of long delimbed sawlogs. The hybrid bunches were skidded to a landing where they were chipped or loaded. The cut-to-length system had higher costs per unit of material and yielded less fuel than the other systems. The cut-to-length system damaged fewer trees in the natural stand than the other systems, but damage levels were low for all systems. Other environmental impacts - on soil, fuel levels, insect activity and stand growth - are still being evaluated.

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Hartsough, Bruce R.; McNeel, Joseph F.; Durston, Thomas A.; Stokes, Bryce J. 1994. Comparison of mechanized systems for thinning Ponderosa pine and mixed conifer stands. 1994 international winter meeting sponsored by the American Society of Agricultural Engineers. ASAE Pap. 94-7513. St. Joseph, MI; American Society of Agricultural Engineers. 20 p.

 


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