engleski

Agrotechnical and energetic characteristics of a rotary cultivator with spike tines in seedbed praparation

The paper presents results of researching aimed to find an optimal combination of working factors (working velocity, depth of tillage and tine"s peripheral velocity) of a rotary cultivator with spike tines with respect to achieved weighted mean diameter of clods, energy requirement and rate of work. Among 18 combinations of working factors statistical analysis showed that there were 6 combinations which were not significantly different. The best one with respect to minimum energy requirement and highest rate of work was combination of working velocity v3 = 4.87 km/h, depth of tillage h1 = 12.0 cm and tine"s peripheral velocity u3 = 5.91 m/s. This combination of working factors required specific work 140.5 kJ/m3 or specific energy requirement 168.6 MJ/ha with rate of work 1.31 ha/h which was 23.9 % less energy expenditure and gave a 47.0 % higher rate of work in comparison to the next best combination.

rotary cultivator; agrotechnical and energetic characteristics; seedbed preparation

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