The Use of Organic Waste from Animals and Plants as Important Input to Urban Agriculture in México City
Hermenegildo Román Losada Custardoy, Lorena Luna Rodríguez, José Cortés Zorrilla, Juan Manuel Vargas Romero

Abstract
Mexico City is a cosmopolitan city and is the country's financial center, also have agricultural activities as result of the historic development of the Great Tenochtitlan. In 1950 began the modernization of this city and seemed to agricultural production systems disappear, but each of the existing systems had to be attached to the new rules of the city. At present agricultural production systems are characterized by “minifundio” (restricted ownership of land), spaces defined by urban development and the use of industrial waste materials. Production in this city can be characterized into 3 systems (Urban, Sub-Urban and Peri-Urban), there is also east of Mexico City's the “Central de Abasto”, where it sold more than 40% of national agricultural production are generated daily and 11.400 tons of garbage (at least). An important and positive aspect of the type of models described in this study is the use of organic waste products as inputs.

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