Villages formed on the land cleared by the slashandburnagriculture practiced by small social groups.
在社会小群体实行刀耕火种的的农业实践的土地上，村庄形成了。
2
The very nature of the initial slash-and-burnagriculture encouraged a further dependence on agriculture and the aggregation of people into denser settlements.
最初的刀耕火种式农业的本质鼓励人们进一步依赖农业，并促使人们聚集到人口更密集的居住区。
3
Pollen and ash remains show that 2000 years ago the Mayans were growing maize with slash-and-burnagriculture in some areas that over the course of later centuries became permanently flooded wetlands.