Studies on Prevention of Soil Adhesion to Rotary Tiller Devices.
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概要
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Even it is to be preferable that no soil adhesion may happen to the rotary tiller, difficulties on ways for getting perfect stoppage on the soil adhesion are existed, nowadays. Therefore, studies on how to remove the soil adhesion on the rotary tiller and structural development for decreasing the soil adhesion are necessary.The authors examined and discussed on the amount of soil adhesion to every parts of the machines in this study, using the up-cut type rotary that is possible to make various combinations, as steel covers, gum covers, commercial tines, inverted tines (making blade on back ward) and high-polyethylene tines (sticking of high-polyethylene sheet) and etc. In addition, on factors influencing to the adhered soil onto the rotary tillers, the statistical analysis was done by the quantification I. The results were as follows.(1) By the comparative examinations between the steel cover and the gum cover, it was proved that the separation of the adhered soil appeared in a case of the gum cover. This indicated the effect for a counter measure of soil adhesion by giving vibration of contacted tillage tines onto the gum cover.(2) Small differences on the comparative soil adhesion of various parts between combinations of the converted tines and the commercial tines were recognized, and the same effects was taken at two examination (Fig. 5, Fig. 8). But the soil adhesion of gum cover side was less than the commercial tines side in three measure point on some examination (Fig. 8).(3) When comparisons were made on high-polyethylene tines and commercial tines with low moisture contents (37.9-49.8%) of soils, the soil adhesion to the high-polyethylene tines showed in low values compared with commercial tines in every measured places. But the falling off polyethylene sheets sticked on high-polyethylene tines was recognized at about 110m of the tillage, when moisture contents of soils was fairly high (57.8-62.8%). Therefore, the further and perfect methods on the sticking of the polyethylene sheet to tines is needed, in the future.(4) By results on the statistical analysis of moisture contents of soils, organic matter contents of soils, distance of tillage, kinds of covers and kinds of tines by quantification I, big influences in factors to the soil adhesion by organic matter contents of soils and conditions of operations were observed and also the strongest influence was found by the cover of the rotary tiller in the machines and following these, the tillage tines had a role.(5) When results of this experiment was summarized, the best way is presumed that operations with both the gum cover and high-polyethylene tines as a counter measure of the stoppage of the soil adhesion to the tillage is made, after the settlement of problems on the falling-off sticked polyethylene sheet from high-polyethylene tines.
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