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Details van artikel 69 van 185 gevonden artikelen
| Titel: |
Engineering, agronomical and economical evaluation of the non-tillage farming in Venezuela |
| Auteur: |
Américo José HOSSNE GARCÍA J. PÁEZ V. GARCÍA M. ESTRADA M. |
| Verschenen in: |
Revista científica UDO agrícola |
| Paginering: | Jaargang 6 (2006) nr. 1 pagina's 47-59 |
| Jaar: |
2006 |
| Inhoud: |
Venezuela counts with around 300.000 ha under no-tillage farming. It is practically impossible to carry out conventionaltillage in Venezuelan agriculture due to the problem of friability of the farm soils, together with timeliness factor, the highinvolved cost, physical, chemical, biological and thermal damages carried out. The specific objectives are the evaluation ofthe no-tillage with the purpose of appreciating some parameters: (a) engineering, (b) agronomic and (c) economic thatgoverns their process. The engineering factors valued were: weigh, efficiency, field capacity, width, power required andoperation speed. The agronomic: fertilization, pH, organic matter and soil structures. The economic: analysis including thetimeliness factor (0,0002 day-1), the optimum width by maxim and minimum, energy consumption, comparisons with thelease, costs of acquisition, fertilization and conventional mechanization with relationship to the cultivation of corn. It wasapplied the PERT, the point of same opportunity and the regression analysis to interpret the variance among costparameters. Among the economic results the PERT diagram was established for the processes of zero tillage in Venezuela,fixed costs of 18652,33 USD/year, total cost for the unit tractor-seeder of 27261,93 USD/year (34,42 USD/ha), equilibriumlease for 742,25 ha/year, optimum width between 4 and 10 m for of 5000 ha maximum. Among the engineering results, thefield capacity was of 4,95 ha/h, speed of 11 km/h, the price of the direct seeder between 5.648,91-10.119,85 USD/m and anefficiency of 75%. Agronomics: the evaluated parameters produced advantageous results. It is concluded: (a) the zerotillagereduced the costs, (b) the problems of the opportune time of operation are highly reduced, (c) the structure of the soilis favored, (d) it is cheaper to leasing and (e) the operational process of the productive process is lessened. |
| Uitgever: |
Universidad de Oriente Press (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 69 van 185 gevonden artikelen
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