Resumo

QUIMIS-GUERRIDO, Byron Leonardo  e  SHKILIOVA, Liudmyla. Technological and Operation Evaluation of the YTO DF-15L Rototiller in Soil Preparation for Watermelon. Rev Cie Téc Agr [online]. 2019, vol.28, n.2, e07. ISSN 2071-0054.

The present research was carried out in Joa Commune of Jipijapa Canton, Manabí Province, Ecuador. The objective of the work was to determine technological and operation indexes of the YTO DF-15L rototiller with rotary plow in the preparation of soil for the cultivation of watermelon. The methodology to determine the technological and operation indexes was based on the chronometric observation, with the use of the Cuban standard 34-37: 2003. To determine the physic-mechanical properties of the soil the AASHTO standard T-88 was used. The main results showed that the appropriate type of soil for watermelon sowing is with a sandy loam texture, of flat relief and with gravimetric humidity of 18.52%. In addition, it should have a resistance to penetration of 1,0 MPa as average, which allows affirming that the soil is in conditions of good growth for the plant. The obstruction in the field due to harvest remains was 1200 kg / ha. The productivity per hour of operation time was 0.05 ha / h and the coefficient of use of productive time was 0.96. During the observation period, only one break in the rotary plow propellant chain was recorded, the technical safety coefficient was 0.97, the depth of soil preparation reached 15,9 cm and the quality of fluffy soil was satisfactory. It was concluded that the technological and operation indexes of the YTO DF-15L rotary tiller in the preparation of soil were satisfactory, being recommended to the producers to sow watermelon seeds, not on flat terrain, but on ridges with a height of 10 to 20 cm, which can be made with manual tools.

Palavras-chave : indexes; chronometric observation; rotary tiller; productivity.

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