Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Construction of an Yucatec Maya soil classification and comparison with the WRB framework. | Bautista and Zinck Journal of Ethnobiology and Ethnomedicine 2010 6 7 http content 6 1 7 JOURNAL OF ETHNOBIOLOGY AND ETHNOMEDICINE RESEARCH Open Access Construction of an Yucatec Maya soil classification and comparison with the WRB framework Francisco Bautista1 t J Alfred Zinck2t Abstract Background Mayas living in southeast Mexico have used soils for millennia and provide thus a good example for understanding soil-culture relationships and for exploring the ways indigenous people name and classify the soils of their territory. This paper shows an attempt to organize the Maya soil knowledge into a soil classification scheme and compares the latter with the World Reference Base for Soil Resources WRB . Methods Several participative soil surveys were carried out in the period 2000-2009 with the help of bilingual Maya-Spanish-speaking farmers. A multilingual soil database was built with 315 soil profile descriptions. Results On the basis of the diagnostic soil properties and the soil nomenclature used by Maya farmers a soil classification scheme with a hierarchic dichotomous and open structure was constructed organized in groups and qualifiers in a fashion similar to that of the WRB system. Maya soil properties were used at the same categorical levels as similar diagnostic properties are used in the WRB system. Conclusions The Maya soil classification MSC is a natural system based on key properties such as relief position rock types size and quantity of stones color of topsoil and subsoil depth water dynamics and plant-supporting processes. The MSC addresses the soil properties of surficial and subsurficial horizons and uses plant communities as qualifier in some cases. The MSC is more accurate than the WRB for classifying Leptosols. Background Ethnoecology is concerned with studying the relationships between humans and nature and investigates how indigenous people perceive know and use the landscapes and their natural resources. This approach puts
