Knowledge of the Milpa Cultivation System: A Sustainability Strategy Based on Traditional Agriculture

1. Introduction The milpa system—an ancestral Mesoamerican agroecosystem—remains one of the most resilient and culturally significant models of traditional agriculture in Mexico. Based on the intercropping of maize (Zea mays), beans, squash, and complementary species, the milpa functions as a biocultural heritage system that integrates ecological balance, sustainable food production, and community identity. Fieldwork conducted in Tlaxiaco, Oaxaca, documents how this polyculture promotes soil fertility, regulates microclimates, encourages biodiversity, and sustains socio-cultural practices transmitted across generations. Despite pressures from climate change, migration, and market-driven monocultures, the milpa continues to serve as a vital strategy for food sovereignty. This research aimed to analyze the cultivation processes and adaptive strategies employed by local farmers who preserve the use of native maize varieties under variable climatic conditions. The study aligns with Sustainable Development Goals (SDGs) 2 (Zero Hunger), 12 (Responsible Consumption and Production), and 13 (Climate Action), emphasizing the strategic relevance of traditional agriculture for sustainable development. Understanding how ancestral knowledge coexists with emerging technologies provides a pathway for strengthening rural resilience and promoting sustainable agricultural transitions. 2. Methodology A mixed-methods design was applied to capture both the ecological and socio-cultural dimensions of the milpa. Semi-structured interviews, questionnaires, and participant observation were conducted throughout an entire agricultural cycle. Participants included active farmers cultivating native maize within the microregion of Tlaxiaco. Data collection focused on:(1) land preparation practices;(2) seed management and selection of native varieties;(3) traditional techniques—picado, cajetes, tapa pie, manual weeding, and organic fertilization;(4) responses and adaptations to climatic variability; and(5) integration of modern tools such as drip irrigation, mechanized tillage, and moisture-sensing mobile technologies. Photographic and field documentation provided visual evidence of cultivation stages, environmental interactions, and community knowledge exchanges. Qualitative information was systematized through coding and thematic analysis, while quantitative elements (e.g., frequency of practices, reported yields, perceived risks) contributed descriptive statistics supporting the interpretive framework. 3. Results Findings show that the milpa persists as a dynamic agricultural system capable of adapting to environmental and socio-economic changes. Farmers reported recurrent challenges, including prolonged drought, soil compaction, and increased pest incidence. Nevertheless, traditional techniques demonstrated environmental efficiency: maintaining soil moisture, reducing erosion, and optimizing the use of local resources. Three key adaptive strategies emerged: Ecological Practices:Crop rotation, organic composting, and the application of natural soil amendments contributed to improved fertility and plant vigor. Farmers highlighted the advantages of conserving native seeds for resilience and taste quality. Technological Integration:New practices such as the selective use of tractors, drip irrigation, and mobile-based tools for monitoring humidity and rainfall patterns complement traditional methods rather than replace them. This coexistence reflects a hybrid model of innovation rooted in ancestral knowledge. Cultural Continuity and Knowledge Transmission:Intergenerational learning remains central to the system’s sustainability. Community practices, seed exchanges, and collective workdays reinforce cohesion and strengthen local identity, ensuring the continuity of the milpa beyond its agronomic role. Overall, results confirm that the milpa enhances ecological resilience, stabilizes yields under climatic uncertainty, and preserves cultural heritage while allowing gradual, community-led technological innovation. 4. Conclusions The study demonstrates that the milpa is a living, evolving agroecosystem that merges traditional knowledge with selective modern technologies to ensure food security, cultural continuity, and environmental sustainability. Its adaptive strategies provide a viable model for addressing current agricultural challenges associated with climate change and rural marginalization. Strengthening this system requires public policies that promote farmer training, financial support, and technological access while respecting community autonomy and cultural values. The findings underscore that traditional agricultural systems are not relics of the past; rather, they are strategic resources for building sustainable, resilient, and culturally grounded futures for rural communities in Mexico.