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The aim of this article is an analysis on the technical and exploitation indicators of the cane harvester machine Case-7000, used in different Agriculture Cooperatives, such as: "Gilberto Aguilar"," Veracruz", "Concordia", "San Carlo # 1" and " Desembarco del Granma". All of them belong to the Sugar Enterprise/Company "Batalla de las Guásimas", Vertientes, Camaguey. This evaluation was made during 29 labor days, 2009, in periods of 12 hours each. So that there was a total of 1152 hours and 15 089, 78 t obtained on the basis of chronometry method. The technical and organizational causes as well as an economical evaluation to analyze their influence on the company production results are described on this paper. [ABSTRACT FROM AUTHOR]

This paper is to contribute for the right use of irrigation technologies and the nitrogen application in the maize (Zea mays L.) production. Hence, the objective was determined the influence of two irrigation technologies and two levels of nitrogen application on the area leaf index (AFI), biomass production and the grain income. The design was in divided parcel, the big one consists on two irrigation technologies and the small one consists on two levels of nitrogen. The drip irrigation technique and the dose of 300 kg of N ha-1 shows us the higher addition effect that the others treatments according to biomass production and the grain income. On the contrary the higher value of index leaf area (AFI) with the drip Irrigation techniques and level of 400 kg of N ha-1 was to obtain the higher value of index leaf area (AFI). However, the optimum level area leaf index (AFI) is the principal cause of there is not statistical relationship between the biomass production and the grain income with the irrigation technologies. [ABSTRACT FROM AUTHOR]

The paper is based on an evaluation practiced to the South African sprinkler of «FLOPPY Sprinkler» where were determined some hydraulic parameters that intervene in the design of an irrigation installation. The rehearsal was carried out in the Hydraulic Laboratory of the Research Institute of Irrigation and Drainage according to the norm ISO 7749-2 of 1990. The results indicate that the flow rate equation for this sprinkler is Q =627,19.h 0.1449 of with a regression coefficient of R² = 0,8499, being for this sprinkler type the best application intensity relationship against effective radio, to the pressure of 400 kPa with a value of 4.286 mm/h and an effective radius of 8,60 m. [ABSTRACT FROM AUTHOR]