ABSTRACT
The origins of agriculture in Mexico started with the domestication of teosinte grass that was the initial cultivated plant at the beginning of a new food system that after some millenniums will be the basic crop of human populations in several countries of the world. Scholars discussed the origins of agricultural activity and its relationship with the domestication of plants as beginning with vegetative reproduction or by cutting. This has been very important in tropical regions, probably, where the branches and fruits of numerous plants fall reproducing naturally as a result of wind and heavy rains. Grain-based agriculture experience required other circumstances, like observation, trial and error (initial experimentation), and the accumulated folk or local knowledge. Archaeological and palaeobotanical studies of cores and excavated places in S. Andrés and Tabasco provided evidence that maize pollen, phytoliths, starch granules, and Sunflower seeds were cultivated since 7300 BP.
