Bringing Social Science Into Critical Zone Science: Exploring Smallholder Farmers' Learning Preferences in Chinese Human‐Modified Critical Zones.

There is a growing global emphasis on sustainable agriculture to reduce human impacts and improve delivery of Sustainable Development Goals (SDGs). With increasing investment in critical zone observatories (CZOs), it becomes important to understand how sustainable agricultural knowledge is produced, shared and used between different groups including farmers, scientists and government. To explore these issues, scientists leading the knowledge exchange (KE) component of a China‐UK CZO program studied three farming regions with contrasting geologies and varying economic levels, using a practice‐based research method. We demonstrate how additional funding for social science research allowed us to understand how farmers access and share farming knowledge through bonding, bridging and linking networks, and how this varies spatially, using interviews and survey questionnaires. Knowledge flows, barriers and opportunities for designing locally suited two‐way KE activities were identified. First, we highlight the need for a more locally, socially embedded and reflexive approach to build trust and better address pressing local environmental challenges. Second, we show how social science can usefully inform KE for collaborative, international development science, to draw on local knowledge, promote research impacts and capacity building while avoiding knowledge mismatches. Lastly, a blueprint for the design and funding of future CZOs, social‐ecological and planetary health research agendas that combine science, social science, local knowledge and KE is presented, including the need for substantive social science research to take place in addition to science research in human‐modified landscapes—enabling the CZ science to be better grounded in, informed by and useful to local communities. Plain Language Summary: There is a growing global need for sustainable agriculture to reduce human impacts on the environment. To do this, we need to have a better understanding of how sustainable agricultural knowledge is produced, shared and used between different groups including farmers, scientists and government. In this paper, we explored these issues in three farming regions in China, using a practice‐based research method where we interviewed and surveyed several 100 farmers. We found that in two of the three regions, farmers access and share farming knowledge through family networks, whilst in the third region farmers learned from a broader range of groups including scientists and government. We recommend that future science studies in stressed agricultural landscapes use a more local approach to build trust and carry out science that better addresses pressing local environmental challenges. This requires us to study people, the residents in these landscapes, using social science, alongside understanding how the landscape is functioning ecologically. Lastly, we propose a new "blueprint" for funding of future science, social‐ecological and planetary health research agendas that combine science, social science, local knowledge and knowledge exchange. This will enable environmental science to be better grounded in, informed by and useful to local communities. Key Points: A blueprint for future critical zone observatories and planetary health research is presented that combines science, social science and local knowledgeWe show how social science can usefully inform knowledge exchange (KE) for collaborative science, to build capacity while avoiding knowledge mismatchesSpatial variations in how farmers learn through bonding, bridging and linking networks exist, showing the need for a local approach to KE [ABSTRACT FROM AUTHOR]