Existing reviews on agriculture and nutrition tend to focus on the size, rather than the pathways of impacts.  In this discussion paper for the International Food Policy Research Institute, Deborah Johnston, Sara Stevano, Hazel Malapit and Elizabeth Hull address the limitations of previous studies by considering a larger evidence base and exploring time as one of the agriculture-nutrition pathways. They show how agricultural practices and interventions determine the time dedicated to agricultural and domestic work. Time spent in agriculture - especially by women - competes with time needed for resting, childcare, and food preparation and can have unintended negative consequences for nutrition.
http://www.ifpri.org/cdmref/p15738coll2/id/129389/filename/129600.pdf

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