|Physical and mechanical properties of Common Alder-wood (Alnus glutinosa Gaertn.). PDF EN||273|
|Šarić Ana, Milatović Ivanka|
|A trial of Poplar Rust control in the tree nursery of Banova Jaruga. PDF EN||290|
|Time consumption and determinations of labour costs for resin-tapping operations. PDF EN||292|
|Summary: In this paper the author deals with the question of time consumption in resin-tapping operations as well as with the determination of labour costs for the French resin-tapping method.|
In his opinion it is possible to establish normal work performances only by means of an analytical calcylation method.
The data obtained about the time consumption are presented in Tab. 1. Here it is visible that the time needed for the performance of single operations per face decreases in so far as the number of faces on the tree is increased. The time consumption per face for the whole resin-tapping season if there is on the tree one face is marked with the index 100 %; if there are two faces the index amounts to 83.93 %, and to 78.54 % and 75.77 % for three and four faces respectively.
The percentage of time consumption for preparatory-final works as compared to the total time consumption amounts in all faces to ca. 15 % and that used for chief work to ca. 85 %.
On the basis of actually used time for single operations there were calculated daily normal performances per face for all work operations if there are to be found on the tree one and two faces respectively.
The author gives a suitable expression for the calculation of the daily normal performances if there are to be found in the stand trees with a different number of faces.
In Table 2 is presented the structure of time used for single work operations. It is visible that the percentage of time consumption for going from tree to tree varies with respect to the individual operations. The intervals show smaller differences and on an average amount in all work operations to 10.82 % in relation to the total time consumed.
The author recommends that the height of the workers´ wages should be determined per 1 kg. of resin produced - according to resin flow - separately for individual months. Thus the workers will be correctly salaried according to the working effect. Calculation of the wages can be effected in the manner represented in the paper.
|Causes of stand degradation. PDF EN||307|
|A contribution to the knowledge of forest soils of the Bosut region. PDF EN||317|