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LUZ
Maracaibo, Venezuela

Moreno Quintero R.J.,University of Zulia | Melean Romero R.A.,LUZ | Bonomie Sanchez M.E.,LUZ
Agroalimentaria | Year: 2011

The complex process of transformation of poultry industry in the Zulia region of Venezuela and the amplitude of this value chain require determining management policies oriented to management of stocks (inventories), as a key element to ensure continuity on its operations. In this sense, the aim of this paper is to analyze the inventory management in the poultry company La Rosita S.A. (AVIROSA) case. Thus, first of all, the authors identified all the types of inventory used by the organization; and, afterwards, the policies implemented for planning and control of these assets were studied. A descriptive methodology under a non-experimental approach was used, based on secondary sources and also primary data collection; this latter were obtained through a questionnaire in the form of surveys, as well as in-depth interviews with key people working inside the organization. Main results indicate that the company uses raw materials, work-in-process and finished goods inventories in various stages of the value chain; moreover, planning policies and control to this area are flexible and defined in terms of two factors: 1) internal changes made in the production process, and 2) external requirements demanded by the market. It concludes that an irregular management of inventories of raw materials, work-in-process and finished goods has been applied during the supply chain; additionally, the inventory policies are not accurately systematized for compliance; instead, these policies are determined by personal experience in the poultry industry. Source


Hernandez-Araujo J.A.,University of Zulia | Gasco Guerrero G.,Technical University of Madrid | Marmol L.,LUZ | Barcenas J.,LUZ | Polo V.,LUZ
Revista de la Facultad de Agronomia | Year: 2013

Soil is a live element filled with a biodiversity, making it one of the essential ecosystems for life. For misuse have been blighted for many soil salinization. The objective was to evaluate the bioremediation of a soil with salt problems with the application of two proportions [1.5 and 3% (w/w)] of three organic amendments: compost, vermicompost and Lemna solid blend or not with 100% the requirement of phosphogypsum, generating 15 treatments. The evaluation was conducted in simulated soil columns incubated with organic materials, compost and vermicompost were processed with the use of cow manure, Lemna was recollected from the shores of Maracaibo's Lake. Significant differences (P<0.05) between treatments for the variable electrical conductivity, sodium absorption ratio and exchangeable sodium percentage, there were no differences between the proportions and the use of phosphogypsum. The material with less potential for bioremediation was the Lemna by its high contents of Na+. The methodology of simulated soil columns under the study conditions was entirely appropriate to evaluate the bioremediation driven into the ground to control the effect of water application. Also, there was recovery of the product of its reduction in the content of salts, its recovery was higher in those amended with Lemna. The amendment vermicompost at 1.5% is recommended for bioremediation of soils affected by salts. Source


With a view to designing general structures for accounting of costs in production systems of dual purpose in Táchira State, was carried out a research of projective type design field, expostfacto, contemporary transactional and study of traits in north and south areas of Táchira state. The technique of survey by questionnaire instrument was used; this was applied to 109 producers. Descriptive statistics and cluster analysis used to characterize systems according to the technology used and intent of the same. 4 groups were with differences in average values of components for technology: minimal, basic, medium and high, and two systems according to intentionality: cow-calve and cow-bull. Generally, the most important elements of cost are labour, food and medicines, less productive technological groups are minimal and high and, most productive medium group which coincides with larger farms with increasing use of machinery. 78% of the total farms, is dedicated to the production and sale of milk and calves at weaning distributed in 4 technology groups. The proposed accounting structures vary depending on the application of management strategies in each technology group, the capitalization costs (historical cost attached to the theory of costs by absorption) is warranted in cases in which work with systems cow-calves (prenatal costs and breeding centers) or cow-bull (prenatal cost centers, parenting, levanter, fattening). Source


Zavrtanik J.,LUZ | Pogacnik A.,Fakulteta za gradbenistvo in geodezijo
Geodetski Vestnik | Year: 2012

Notwithstanding the impression that the pressure on land is decreasing because of the current economic crisis, the challenge of a contemporary urban planning to involve all stakeholders as equally as possible in the planning process remains unchanged. This article focuses on the acceptability of the integration private initiatives into the decision-making process. It asserts that urban planning based on private initiative does not lead to a sustainable spatial development; furthermore, the existing criteria-based land development approach does not necessarily give optimal results. Source


In the western of Venezuela, in an area characterized as very dry tropical forest, an experiment was conducted in order to evaluate the defoliation frequency effect on yield of dry matter (DM) of botanical fractions of purple King grass (Pennisetum purpureum x Pennisetum typhoides). It was determined the yield of DM in leaves (DMSH, g.plant-1), internodes (DMSE, g.plant-1), nodes (DMSN, g.plant-1), total (DMST, g.plant-1) and leaf: Stem (RHT) under three defoliation frequencies (30, 45 and 60 days). A completely randomized design was used with seven replications. The results showed a significant effect (P<0.05) in the frequency on DMSH, DMSE, DMSN and DMST, while it did not affect the RHT. The highest yields of DM botanical fractions were obtained when the plants were harvested every 60 days (170.4, 32.5, 7.52 and 210.43 g.plant-1 for DMSH, DMSE, DMSN and DMST, respectively). The RHT gained an average of 7.25. The largest proportion in the composition of the plant was leaf (86.98%) followed by internodes (10.14%) and knots (2.88%). The best behavior of the purple king grass was obtained when the plants were harvested to 60 days. © 2015 Universidad del Zulia. All rights reserved. Source

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