Abstract
Abstract This article examines the history of leguminous grasses in the Brazilian Cerrado between the early 1950s and early 1970s. The westward expansion of the Brazilian agrarian frontier was a massive ecological transformation, propelled by a transnational process that relied on a series of actors beyond the national borders, most notably the Rockefeller-sponsored IRI research institute. However, as the article demonstrates, this epistemic transformation was also crucially complemented by the ecological potential of a set of leguminous grasses that gave an essential contribution to the ecological reconversion of the Brazilian Cerrado . These sturdy nitrogen-fixing species grew extensively - and mostly autonomously - on these arid territories, propelling agrarian development in the region. However, while the successful interaction between anthropogenic and non-anthropogenic actors led to successful techno-scientific and economic results, it also led to severe socio-environmental consequences.
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