EFFECTS OF DIFFERENT GEOMETRICAL STRUCTURES ON THE SOIL DISTURBANCES AND WORKING RESISTANCES OF VERY NARROW TINES APPLIED ON NATURAL GRASSLAND
| Autor: | He Changbin, Yong You, Bingnan Ye, Hongjian Wu, Decheng Wang |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | INMATEH Agricultural Engineering. :23-32 |
| ISSN: | 2068-2239 2068-4215 |
| DOI: | 10.35633/inmateh-64-02 |
| Popis: | Novel tillage tools with high working performance are desired in improving degraded natural grassland tillage system. This paper aimed to find the influence of various geometry structures of very narrow tines on related soil disturbance characteristics and tillage resistances. Four shank-type tillage tines with different cutting head shapes, and the test bench were designed and manufactured. Field experiments under different working depths were conducted. The working depth uniformity, soil over-turning rate, cross-section area of disturbed soil layer, and related forces were obtained, analysed, and compared. Results showed that, the working depth uniformities were above 70%, and soil overturning rates did not exceed 5%. Furrows with V-shaped cross-section were formed. The tine with an arc-shaped cutting edge (AT) obtained a lower draft force value, and the tine with chamfer structure (TTD) presented big differences on the draft force and soil disturbance compared to the tine with blunt cutting edge (TT). Both the draft force and the area of disturbed soil cross section had a good linear relationship with the working depth, and the specific draft force increased with the working depth increasing. Using a very narrow tine with chamfers to split and break the soil layer on the natural grassland without pulling or dragging the roots could be an appropriate tillage method applied for improving degraded natural grassland, but still need further surveys. |
| Databáze: | OpenAIRE |
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