Revista Ciencias Técnicas Agropecuarias
On-line version ISSN 2071-0054
JIMENEZ ESPINOSA, Esequiel Rolando et al. Study irrigation uniformity, in center pivot machine . Rev Cie Téc Agr [online]. 2010, vol.19, n.1, pp. 95-97. ISSN 2071-0054.
The work was carried out in the Unit of Scientific and Technician Development in Pulido, Alquìzar in a central pivot machine of the Otech-Irrimec4 enterprise. For the study four tests were developed with different variants for emitters of the type: Spray Nelson D3000K and Spray IIRD. The methodology for the evaluation was Cuban standard NC ISO 11545:2005. The parameters Coefficient by uniformity of Heermann and Hein (CUh), Coefficient of uniformity of variation by Bremond and Molle (CUV) and distribution Uniformity (UD25%) were determined and its graphic relationship with the Area Irrigated Appropriately (ARA). The results threw that the best variant was: "spray IIRD at 1m of height, without regulator of pressure and with counterbalances" where the biggest values CUh, CUV, UD25% and ARA with 82,33%, 77,51%, 68,08% and 56% respectively were obtained. The classification of the irrigation quality also settled down using the percentage of Area Irrigated Appropriately, starting from the obtaining of the CUh and of the approaches of Tarjuelo.
Keywords : Coefficient of uniformity; distribution uniformity; pivot; spray.