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 This study presents a detailed analysis of cost management for intensive cultivation activity in terms of tomato production. The main objective was to provide qualitative and quantitative costs obtained in the intensive cultivation of tomato. This methodology was structured by activity costs (soil preparation and planting, crop monitoring, harvesting, selling, etc.) through a study in greenhouses in Almería, Spain. According to the results, this kind of management provides a cost analysis of the products, with extensive information on variable costs, produces measures that are used for cost management and operational performance evaluation; helps in the identification and the evolution of costs; identifies the main activities and tasks carried out during the growing season; and quantifies the cost margin, which enables the farmers to position their products strategically in the market with competitors.

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Asparagus (Asparagus officinalis L.) is considered an important crop in the region of Caborca, Sonora, due to its high production and its natural antioxidant (phenolic compounds) content. The use and effect of natural antioxidants on Refined soybean oil (RBD) were evaluated by the Oxidative Stability Index (OSI) using the Rancimat Method. Asparagus phenolic compounds were extracted with 95: 5 (v: v) ethanol: water. The antioxidant activity of the hydroalcoholic extract obtained was compared to Tertiary Butyl Hydroquinone (TBHQ) and to a mix of tocopherols in soybean oil free of synthetic antioxidants, which complied with the chemical properties and composition of pure edible soybean oil. The total phenol content in asparagus extract was similar to what was reported in other fruit and asparagus in various countries. The soybean’s oil with higher concentrations of asparagus ethanol extract than 0.3% (w/w) showed statistically higher induction times (P< 0.05) than natural (tocopherols) and synthetic antioxidants (TBHQ) at the tested concentrations, which strongly supports the concept of using asparagus as a source of natural antioxidants.