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BACKGROUND The relationships between soil and coffee beans variables were evaluated and then the influence of bean composition on cup quality attributes was computed by means of relation studies. A total of 139 coffee and soil samples were collected directly from the same number of coffee plantations in Chiapas, Mexico. RESULTS: In the elemental composition, only phosphorus, potassium, calcium, and copper in coffee beans had a significant (P < 0.05) relationship with the content of the same elements in soil. The level of macro‑ and microelements in the coffee bean affected some of the cup quality attributes, but variables such as texture, titratable acidity, and pH of water in soil had a major influence on those attributes. Caffeine, trigonelline, and 5‐caffeoylquinic acid in green coffee beans also had a significant influence (P < 0.05) on the sensory attributes of the beverage. CONCLUSION: The elemental composition of soil and coffee beans was important in explaining the cup quality attributes, but the most important variables influencing the sensory quality of coffee were altitude of plantations and moisture of coffee beans. © 2020 Society of Chemical Industry [ABSTRACT FROM AUTHOR]

The present study was based on determining the natural potential of Abies guatemalensis Redher (Guatemalan fir) in the Forest Management Unit (UMAFOR) 07 Sierra of the state of Chiapas, to identify the optimal sites for its establishment. Geographic information systems (GIS) were used as a technological tool to model the variables that determine the distribution of the species. The information collected in the field was: altitude, exposure, slope, coordinates, as well as thematic maps of soil, vegetation, climate, precipitation and a digital elevation model, with which slope, exposure and altitude cover were generated. The variables that showed the best results were: altitude, humid temperate climate and annual precipitation greater than 2,000 mm. The vegetation corresponds to coniferous and coniferous-broadleaf trees with a slope of 25 to 50%, respectively. This is due to the fact that the productivity of the forests is linked to the ecological attributes of the territory. In this context, the study showed an area of 15,380.71 hectares with the potential to establish A. guatemalensis Redher., in five municipalities of UMAFOR 07 Sierra. With the use of GIS technology, the results were reliable enough to establish reforestations or plantations for the recovery or conservation of the pine. [ABSTRACT FROM AUTHOR]