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Chinampa (Template:Langx {{#invoke:IPA|main}}) is a technique used in Mesoamerican agriculture which relies on small, rectangular areas of fertile arable land to grow crops on the shallow lake beds in the Valley of Mexico. The word chinampa has Nahuatl origins, chinampa meaning “in the fence of reeds”. They are built up on wetlands of a lake or freshwater swamp for agricultural purposes, and their proportions ensure optimal moisture retention.<ref> Oxford University Press, 2001. Template:ISBN</ref> This method was also used and occupied most of Lake Xochimilco. The United Nations designated it a Globally Important Agricultural Heritage System in 2018.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Although different technologies existed during the Post-classic and Colonial periods in the basin, chinampas have raised many questions about agricultural production and political development. After the Aztec Triple Alliance formed, the conquest of southern basin city-states, such as Xochimilco, was one of the first strategies of imperial expansion. Before this time, farmers maintained small-scale chinampas adjacent to their households and communities in the freshwater lakes of Xochimilco and Chalco. The Aztecs did not invent chinampas but rather were the first to develop it to a large scale cultivation.<ref name="Kasperson" /><ref>Template:Cite journal</ref> Sometimes referred to as "floating gardens," chinampas are artificial islands that were created by interweaving reeds with stakes beneath the lake's surface, creating underwater fences.<ref name=":5">Template:Cite CiteSeerX</ref> A buildup of soil and aquatic vegetation would be piled into these "fences" until the top layer of soil was visible on the water's surface.<ref name=":5" />
When creating chinampas, in addition to building up masses of land, a drainage system was developed.<ref name=":3">Template:Cite journal</ref> This drainage system was multi-purposed. A ditch was created to allow for the flow of water and sediments (likely including night soil).<ref name=":4">Pedro Armillas, "Mesoamerica" in A History of Land Use in Arid Regions, L. Dudley Stamp, ed. Paris: UNESCO 1961, 266-67.</ref> Over time, the ditch would slowly accumulate piles of mud.<ref name=":3" /> This mud would then be dug up and placed on top of the chinampas, clearing the blockage.<ref name=":3" /> The soil from the bottom of the lake was also rich in nutrients, thus acting as an efficient and effective way of fertilizing the chinampas.<ref name=":3" /><ref name="Baq">Baquedano, E. (1993). Aztec Inca & Maya. A Dorling Kindersley Book: Singapore. Template:ISBN</ref> Replenishing the topsoil with lost nutrients provided for bountiful harvests. Embarcadero-Jiménez and colleagues tested the correlation between environmental parameters and bacterial diversity in the soil. It is speculated that a diverse array of bacteria can affect the nutrients in the soil. The results found that bacterial diversity was more abundant in cultivated soils than non-cultivated soils. Also, "the structure of the bacterial communities showed that the chinampas are a transition system between sediment and soil and revealed an interesting association of the S-cycle and iron-oxidizing bacteria with the rhizosphere of plants grown in the chinampa soil".<ref>Template:Cite journal</ref>
Evidence from Nahuatl wills from late seventeenth-century Pueblo Culhuacán suggests chinampas were measured in matl (one matl = 1.67 meters), often listed in groups of seven.<ref>Cline, Colonial Culhuacan, pp. 134-35.</ref><ref>Template:Cite journal</ref> One scholar has calculated the size of chinampas using Codex Vergara as a source, finding that they usually measured roughly Template:Convert.<ref name="Jorge">Template:Cite journal</ref> In Tenochtitlan, the chinampas ranged from Template:Convert<ref name="Jorge" /> to Template:Convert<ref name="Jorge" /><ref>Tompkins, P. (1976). Mysteries of the Mexican pyramids. Fitzhenry & Whiteside Limited: Toronto. pp. 299 Template:ISBN</ref> They were created by staking out the shallow lake bed and then fencing in the rectangle with wattle. The fenced-off area was then layered with mud, lake sediment, and decaying vegetation, eventually bringing it above the level of the lake. Often trees such as āhuexōtl {{#invoke:IPA|main}} (Salix bonplandiana)<ref name="Kasperson">Template:Cite book</ref> (a willow) and āhuēhuētl {{#invoke:IPA|main}} (Taxodium mucronatum)<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> (a cypress) were planted at the corners to secure the chinampa. In some places, the long raised beds had ditches in between them, giving plants continuous access to water and making crops grown there independent of rainfall.<ref>Cline, Colonial Culhuacan p. 2.</ref> Chinampas were separated by channels wide enough for a canoe to pass.Template:Citation needed These raised, well-watered beds had very high crop yields with up to 7 harvests a year. Chinampas were commonly used in pre-colonial Mexico and Central America. There is evidence that the Nahua settlement of Culhuacan, on the south side of the Ixtapalapa peninsula that divided Lake Texcoco from Lake Xochimilco, constructed the first chinampas in C.E. 1100.<ref>Richard Blanton, "Prehispanic Settlement Patterns of the Ixtapalapa Peninsula Region, Mexico." Ph.D. dissertation, University of Michigan 1970.</ref>
HistoryEdit
The earliest fields that have been securely dated are from the Middle Postclassic period, 1150–1350 CE. Chinampas were used primarily in Lakes Xochimilco and Chalco near the springs that lined the south shore of those lakes. The Aztecs not only conducted military campaigns to obtain control over these regions but, according to some researchers, undertook significant state-led efforts to increase their extent.<ref>Since many of the chinampas regions show a uniformity of size and orientation, researchers such as Townsend assume they were constructed by "a planned program ... over a short time". (p 167)</ref> There is some strong evidence to suggest state-led operations for the “expansion” of the chinampas. This is sometimes referred to as the hydraulic hypothesis, which is directly related to a hydraulic empire, which is an empire that maintains power and control through the regulation and distribution of water. There is evidence to support the idea of state involvement, primarily the amount of manpower and materials it would take to build, turn, and maintain the chinampas. However, arguments about state control of the chinampas rely upon the assumption that dikes were necessary to control the water levels and to keep the saline water of Lake Texcoco away from the freshwater of the chinampa zone. This is plausible, but there is evidence that the chinampas were functional before the construction of a dike that protected them from the saline water. It is suggested that the dike was meant to drastically improve the size of the chinampa operation.<ref>Template:Cite journal</ref>
Chinampa farms also ringed Tenochtitlán, the Aztec capital, which was considerably enlarged over time. Smaller-scale farms have also been identified near the island-city of Xaltocan and on the east side of Lake Texcoco. With the destruction of the dams and sluice gates during the Spanish conquest of the Aztec Empire, many chinampas fields were abandoned.<ref>Template:Cite journal</ref> However, many lakeshore towns retained their chinampas through the end of the colonial era since cultivation was highly labor-intensive and less attractive for Spaniards to acquire.<ref>Charles Gibson, The Aztecs Under Spanish Rule. Stanford: Stanford University Press 1964.</ref>
The Aztecs built Tenochtitlan on an island around 1325. Issues arose when the cities' constant expansion eventually caused them to run out of room to build. As the empire grew, more sources of food were required. At times this meant conquering more land; at other times it meant expanding the chinampa system. With this expansion, chinampas' multiple crops per year became a large factor in the production and supply of food. Empirical records suggest that farmers had a relatively light tribute to pay compared to others because the annual tribute may have been only a fraction of the amount necessary for local needs.<ref>Template:Cite journal</ref>
The extent to which Tenochtitlan depended on chinampas for its fresh food supply has been the topic of a number of scholarly studies.<ref>Template:Cite journal</ref><ref>Edward E. Calnek, "The Organization of Urban Food Supply Systems: The Case of Tenochtitlan" in Las ciudades de América Latina y sus áreas de influencia a través de la historia, Jorge Hardoy and Richard P. Schaedel, eds. Buenos Aires: Sociedad Interamericana de Planificación 1975.</ref><ref>Edward E. Calnek, "El sistema de mercado de Tenochtitlan," in Política e ideología en el México prehispánico," Pedro Carrasco and Johanna Broda, eds. Mexico: Editorial Nueva Imagen, 1978, pp. 97-114.</ref><ref>Jeffrey R. Parsons, "The Role of Chinampa Agriculture in the Food Supply of Aztec Tenochtitlan," in Cultural Change and Continuity, Charles Clelland, editor. New York: Academic Press 1976, 242.</ref>
Among the crops grown on chinampas were maize, beans, squash, amaranth, tomatoes, chili peppers, and flowers.<ref>Van Tuerenhout, Dirk R. (2005). The Aztecs: New Perspectives, p. 106. ABC-CLIO, Inc.</ref> Maize was planted with digging stick huictli {{#invoke:IPA|main}} with a wooden blade on one end.<ref name="Baq" /><ref>Teresa Rabiela Rojas, "Agricultural Implements in Mesoamerica," in Explorations in Ethnohistory, H.R. Harvey and Hanns J. Prem, eds. Albuquerque: University of New Mexico Press 1984</ref>
The word chinampa comes from the Nahuatl word chināmitl, meaning "square made of canes" and the Nahuatl locative, "pan." In documentation by Spaniards, they used the word camellones, "ridges between the rows."<ref>Cline, Colonial Culhuacan, p. 132.</ref> However, Franciscan Fray Juan de Torquemada described them with the Nahua term, chinampa, saying "without much trouble [the Indians] plant and harvest their maize and greens, for all over there are ridges called chinampas; these were strips built above water and surrounded by ditches, which obviates watering."<ref>Juan de Torquemada, Monarquia Indiana, vol. 2, 483. Mexico: Editorial Porrúa 1975.</ref>
Chinampas are depicted in pictorial Aztec codices, including Codex Vergara, Codex Santa María Asunción, the so-called Uppsala Map,<ref>Sigvald Linné, El valle y la ciudad de México en 1550. Relación histórico fundada sobre un mapa geográfico, que se conserva en la biblioteca de la Universidad de Uppsala [Sweden]. Stockholm 1948.</ref> and the Maguey Plan (from Azcapotzalco).<ref>Template:Cite journal</ref> In alphabetic Nahuatl documentation, The Testaments of Culhuacan from the late sixteenth century have numerous references to chinampas as property that individuals bequeathed to their heirs in written wills.<ref>S.L. Cline and Miguel León-Portilla, The Testaments of Culhuacan UCLA Latin American Center, Nahuatl Studies Series, vol. 1 1984.</ref><ref>Cline, Colonial Culhuacan</ref>
There are still remnants of the chinampa system in Xochimilco, the southern portion of greater Mexico City. Chinampas have been promoted as a model for modern sustainable agriculture, although some sources have disputed the applicability of this model. One anthropologist, for instance, reports that attempts by Mexico to develop chinampas among the Chontal Maya people in the 1970s failed until the technicians modified their goals in order to suit the Chontales' interests.<ref>Template:Cite journal</ref>Template:Clarify
Construction:
According to Antonio Vera, through the UH Hilo website, within the framework of chinampas, there was two versions: inland and irrigated chinampas. Inlands are created on banks, irrigated is built on water. Through steps, the structure of chinampas is to locate shallow land by the bank and surround said area with stakes of a common wetland tree [ahuejote]. The urbanization of Mexico lost this tradition and new challenges are created within the urbanization of Mexico.<ref>https://hilo.hawaii.edu/nihopeku/2018/02/02/chinampa-an-ancient-agricultural-system/</ref>
Modern chinampasEdit
As of 1998, chinampas are still present in San Gregorio, a small town east of Xochimilco, in addition to San Luis, Tlahuac, and Mixquic.<ref name=":0">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Although many of these gardens were constructed and thoroughly tended to from the Postclassic Period through the Spanish conquest, many of these plots of land still exist and are in active use.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name=":0" />
Many of these chinampas have been allowed by present-day farmers to become overgrown.<ref name=":0" /> Some choose to use canoes to farm, but many are becoming increasingly dependent on wheelbarrows and bicycles for transportation.<ref name=":0" /> Other fields, such as some located in San Gregorio and San Luis areas, have been deliberately filled up.<ref name=":0" /> As the canals dry up, several of the fields are naturally joined. Although not used for their original purpose, they are commonly used for cattle feed.<ref name=":0" />
Other fields, both dried and surrounded by canals, produce foods such as lettuce, cilantro, spinach, chard, squash, parsley, coriander, cauliflower, celery, mint, chives, rosemary, corn, and radishes.<ref name=":0" /><ref name=":1">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The young leaves of quelites and quintoniles, which are often mistaken for weeds, are grown and harvested as ingredients of sauces.<ref name=":0" /> Flowers also continue to be grown on these plots.<ref name=":0" /> Some chinampa fields are also used as tourist sites.
- Sembradío en chinampa.JPG
An example of a modern-day chinampa
- Chinampa.JPG
One of the remaining chinampas in Xochimilco
- Gran Ganado Chinampas Xochimilco.JPG
An example of cattle feeding on the grasses of dried chinampas lands
ChallengesEdit
Although many locals and farmers are happy to return to their agricultural roots, they are faced with several challenges. During the Spanish conquest, many lakes were drained, limiting their agricultural capacity, such as the lake at Xochimilco.<ref name=":2">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>Template:Cite book</ref> In addition, in 1985 an earthquake struck, further damaging several canals.<ref name=":2" /> Other challenges include limited water supply, the use of pesticides, climate change, urban sprawl, and water pollution caused by untreated sewage and toxic waste.<ref name=":2" /><ref>Template:Cite journal</ref><ref name=":1" />
See alsoEdit
- Aquaponics
- Aquaculture
- Historical hydroculture
- Nanfang Caomu Zhuang, 4th-century Chinese record of floating gardens
- Waru Waru
ReferencesEdit
SourcesEdit
- Blanton, Richard. "Prehispanic Settlement Patterns of the Ixtapalapa Peninsula Region, Mexico." Ph.D. dissertation, University of Michigan 1970.
- Calnek, Edward E., "Settlement Pattern and Chinampa Agriculture," American Antiquity 1972, 37(104-15).
- Chapin, Mac. "The seduction of models: Chinampa agriculture in Mexico," Grassroots Development: Journal of the Inter-American Foundation Volume 12, no. 1, 1988, pp. 8–17.
- Cline, S.L., Colonial Culhuacan, 1580-1600: A Social History of an Aztec Town. Albuquerque: University of New Mexico Press 1986.
- Ezcurra, E. De las chinampas a la megalópolis: El Medio Ambiente en la Cuenca de México. Mexico City, SEP 1991.
- Parsons, Jeffrey R. "The Role of Chinampa Agriculture in the Food Supply of Aztec Tenochtitlan," in Cultural Change and Continuity, Charles Clelland, editor. New York: Academic Press 1976,
- Popper, Virginia (Fall/Winter 2000). "Investigating Chinampa Farming". Backdirt (Cotsen Institute of Archaeology).
- Rabiela, Teresa Rojas. "Chinampa Agriculture". In Davíd Carrasco (ed.). The Oxford Encyclopedia of Mesoamerican Cultures. : Oxford University Press, 2001. Template:ISBN
- Jaslene Miya M. (2000). The Aztecs, revised ed. Jaslene and Jaslene, New York.Template:Full citation needed
External linksEdit
- Chinampas of Tenochtitlan - History of Urban Agriculture:
- Floating Gardens of Mexico City Template:Webarchive
- Chinampas 2.0 – an Elegant Technology From the Past to Save the Future. Rodrigo Laado. Permaculture Research Institute of Australia. May 28, 2013.
- http://hombresdemaiz.com.mx/v2/permacultura-mesoamericanamesoamerican-permaculture-chinampas-2-0-fundraising-edition Template:Webarchive
- Chinampas Gardens. Brianna. Midwest Permaculture. December 6, 2012.
- Soy Xochimilco Template:In lang - CONABIO via YouTube
- Template:YouTube