ABSTRACT
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Opportunities for improved biological management of soil fertility have been debated
mostly among technical actors — agricultural producers, scientists, field agents, the
fertilizer industry, and more recently, land management specialists. While their
discussions have focused on whether or how to enhance the role of biological soil
components in constructing more sustainable and lower-cost approaches to fertility
management for food production, their assessments of technical options and advantages
have, either explicitly or implicitly, been responding to changes in economic and policy
contexts.