Among Mesoamericanists, the agricultural basis of the ancient Maya civilization of the Yucatan Peninsula has been an important topic of research--and controversy. Interest in the agricultural system of the Maya greatly increased as new discoveries showed that the lowland Maya were not limited to slash-and-burn technology, as had been previously believed, but used a variety of more sophisticated agricultural techniques and practices, including terracing, raised fields, and, perhaps, irrigation. Because of the nature of the data and because this form of agricultural technology had been key...