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The present investigation was carried out in "Héctor Molina Riaño" Base Business Unit, with the objective of determining the rational organization of the sugarcane harvest-transport-reception system, through the integration of mathematical models, which guarantee the stability of the flow in the system. The rational conformation of the harvest-transport-reception-system was determined using the following methods: linear programming, queuing theory for a single service station and for stations in cascades. When analyzing the stability of the compositions with the Markov chain model, it is found that the most stable variant is when the queuing theory is used in cascades when working in fields of 75 t/ha, with two CASE IH 8800 Harvesters and four Tractors BELARUS 1523 + four VTX 10000 dump trailers, four HOWO SINOTRUCK aggregates + two trailers and three reception centers with a probability of 53.79% that the cycle will not be interrupted and a cost of system stops of 33.05 peso/h, being possible to reduce the costs by stops in more than 30%, observing a marked influence when increasing the number of collection centers. [ABSTRACT FROM AUTHOR]

Copyright of Ingeniería Agrícola is the property of Instituto de Investigaciones de Ingenieria Agricola and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingeniería Agrícola is the property of Instituto de Investigaciones de Ingenieria Agricola and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present investigation was carried out in Enterprise Unit "Héctor Molina Riaño", with the objective of determining the rational structure of the complex harvest-transport of sugarcane with the use of Markov Model. It was obtained that, for a field with 22,8 t/ha yield, the brigade is organized with two harvester machines (with 16,37% of probability of one failing or breaking) and two means of transport (with 4,7% of probability of one failing or breaking). Given that, the probability of harvester machines operating with external means of transport is almost null, the expense for cycle stop (harvest-transport-reception) is 10,73 peso/h. [ABSTRACT FROM AUTHOR]

This research was carried out on areas of the Agrarian University of Havana, with the objective of determining the power used in traction and gases emitted product of combustion in the plowing labor with the tractor set MTZ-82 and universal moldboard plows of three bodies. To achieve this objective the theoretical and methodological foundations were considered and the necessary measuring instruments were used to determine the reactions of the road on the wheels, the tractor dynamics of traction and the gases emissions produced by the combustion. Starting from the above stated, it was obtained that the biggest road reactions occur on the front wheels of the tractor reaching a value of 6,82 kN, being superior to those of the rear wheels 1,11 kN and wheel field 4,1 kN; the average depth of the work was 16 cm, reaching a mathematical expectation of the speed of 1,34 m/s and a mathematical expectation of the force exerted by the hook of 5,54 kN, being 28,4 L/ha the amount of fuel consumed; hook power reached a value of 7,42 kW, equivalent to 35% of the traction efficiency. In addition, 0, 67 kg of CO, 1,17 kg of CO2 and 0,98 kg of water vapor were ejected to the environment per liter of diesel fuel consumed (C12H26). [ABSTRACT FROM AUTHOR]

Copyright of Ingeniería Agrícola is the property of Instituto de Investigaciones de Ingenieria Agricola and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The increase of the production of the sugar cane in Cuba has become more than an objective a necessity, it is for him that new machines they are introduced for answer to this situation. Having this as the premise and considered the importance that the cultivation of the sugar cane has for the country is that the sugar mill has been chosen «Héctor Molina Riaño» for the influence that in the county Havana has in the results of this cultivation to analyze the results of the means that intervene in the crop and transport of the sugar cane, as well as the conditions of exploitation under those that these that they are developed that what it constitutes the general objective of this work. A methodological base was developed for the analysis of the results. [ABSTRACT FROM AUTHOR]

Taking care of the reality of the Cuban companies to increase the control on its productive process it is necessary to deepen in the different elements that influence in the indicators technical-economic and starting off of the fact that the Batabanó Farm Company is had outstanding in the Havana province by its productive results was decided on the part of the Agrarian University of Havana (UNAH), Faculty of Agricultural Mechanization to make a study on the elements that more incidence they have on the costs reason why the objective is persecuted economically to analyze the campaigns of Pope 2001-2002 and 2002-2003 in the referred company. In order to obtain the raised objective the economic technique of consecutive substitutions was applied in addition obtained the structure of the cost, the relative standard deviations and as well as the values of cost by peso, losses or gains and yield of the company. [ABSTRACT FROM AUTHOR]

The present work is one of the investigations carried out by the Center of Agricultural Mechanization (CEMA) of the Agrarian University of Havana (UNAH), on the evaluation of agricultural groups for the production of food animal, as part of the project "Development of the Technological-Scientific-Educational-Productive Scenario of Cuban Agriculture in the University Farm Guayabal". Its objective was to determine the indicators of operation of the forage chopper RSA/30 during the crumbling of King Grass. A coefficient of use of the time and productivity, in productive time of 0,66 and 18,70 kg/h, respectively, was obtained. [ABSTRACT FROM AUTHOR]