Although the chinampa agriculture in Mexico City is considered an historical sustainable farming system,there have been few studies on its current status. This paper assesses the relationship between agroecological factors and socioeconomic strategies by analyzing urban forces, regional employment, and environmental concerns. Despite ecological deterioration caused by the urban expansion of Mexico City, the economic viability of this agricultural system is still based on the efficient use of farming technologies and resources management strategies that tend to maintain levels of productivity (...) in horticulture and floriculture. The chinampa agriculture generates high income and employment for families and other local residents. This agroecosystem depends on the relationship between the economic priorities and agricultural criteria of farmers. We suggest that urban development, economic growth, and resource management in the chinampa region of Mexico City coincide with ecosystem processes, biological human needs, agronomic productivity, economic viability, and sociocultural values. By evaluating these factors, we provide some useful insights on the importance of this traditional agriculture within a sustainable development context. (shrink)

Much has been written about the chinampas of central Mexico. One of the commonly repeated themes is that these wetland fields were self-irrigated from below in a process known as sub-irrigation. According to this model, water infiltrates the planting platforms from adjacent canals and then rises to the root zone by capillary action. Thus, chinampas are thought to have needed little supplemental irrigation, and produced dependable and high yields. Here I report the results of field and lab studies (...) of soils of 10 chinampas in the region east of Xochimilco, in the Mexican Federal District. These interpretations are combined with discussion of maize rooting tendencies, regional rainfall patterns, and the presence of willow tree roots in chinampa soils. I also consider whether farmers strive to create and maintain optimum field morphologies for subirrigation when faced with both flood and drought risk, and when manual irrigation is aready option. I conclude that while sub-irrigation is possible under certain combinations of field morphology, crop type, and soil properties, it was a relatively minor factor in the overall decision-making process of past chinampa farmers, and should not be a major determinant of future planning for chinampa preservation or reconstruction. Furthermore, sub-irrigation must be modeled carefully in relation to soil properties, croptypes, and seasonality if it is to beconsidered a significant function of wetland fields in any context. (shrink)

In this essay, through the concepts of cosmotechnics and technodiversity proposed by Yuk Hui, I present an exploratory sketch regarding the search for a Mesoamerican cosmotechnics from the perspective of the deep relationship that pre-Hispanic cultures have maintained with maize since ancient times. I consider that this relationship expresses a particular Mesoamerican cosmotechnics that—in Hui’s terms—manages to unify “the cosmic order and the moral order through technical activities” in these societies, even to the present day. Similarly, I argue that the (...) biological, agricultural, and gastronomic techniques—such as the milpa, chinampas, and nixtamalization—which have historically been woven around maize are an example of technodiversity that has persisted and withstood the onslaught of the capitalist logic. Finally, I affirm that this cosmotechnics has the potential to be configured as a cosmopolitics that must first overcome the obstacles of nationalist and identity discourses that became prevalent in post-revolutionary Mexico through the indigenist turn, and that are currently configured around the defence of traditional maize against the attempts to introduce its transgenic equivalent in recent decades. (shrink)