The Inca state drew its taxes through both tax in kind and corvée labor drawn from lineages and administered through a bureaucracy composed largely of local nobility. The corvée labor force was used for military operations as well as public works projects, such as roads, aqueducts, and storage buildings known as tampu and qollqa. There were parallel institutions of lineage-based colonies known as mitmaqkuna, which produced goods for the state and provided strategic security in newly acquired areas, and yanakuna, which were retainers with labor obligations to higher members of the state.McEwan, G.F. (2006). The Incas. W.W. Norton & Co.: New York, p. 97-102Moseley, M.E. (2001). The Incas and their Ancestors. Thames & Hudson:London p. 55-56, 70-77 Lands belonging to the Sapa Inca, the state church, and to panaqas (lineages descending from individual Sapa Incas according to the principle of split inheritance) were often vertical arrayed to access a variety of resources. Indeed, it has been widely suggested that the terraces at Moray were testing grounds for determining which crops would grow under what conditions in order to more efficiently exploit ecozones. The terraces were apparently constructed so that different temperatures and humidities could be achieved through the creation of microclimates, and therefore produce different kinds of crops.Earls, J. The Character of Inca and Andean Agriculture. P. 1-29Atwood, R. (2007) Letter from Peru: The Mystery Circles of the Andes. Archaeology, 60(5)
