Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Akademii Rolniczej we Wroclawiu, ISSN 1505-0297

Grzywiński W. 2004. ENERGY LOAD OF WORKERS EMPLOYED AT TIMBER HARVESTING, EJPAU 7(2), #06.
Available Online: http://www.ejpau.media.pl/volume7/issue2/forestry/abs-06.html

ABSTRACT

The performed investigations comprised 13 workplaces in the process of timber harvesting in premature stands managed in a motor-manual and mechanized technologies. Measurements of net energy expenditures were conducted with the help of the energy expenditure-measuring device MWE-1. Minute values of energy expenditure for individual activities (n=24) as well as energy costs for the working day (8h) were determined. The unit net energy expenditure ranged from 3.1 to 36.2 kJ/min. On the other hand, the recorded net energy cost of a workday ranged from 1.8 thousand to 11.5 thousand kJ. The following workplaces were classified as very heavy ones: fellers, feller’s assistants and skidders of short timber, while positions of operators of harvesters and forwarders were categorised as light.

Key words: energy expenditure, categories of work intensity, motor-manual harvesting, mechanized harvesting, intermediate cutting..

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