Beza, E.Steinke, J.Etten, Jacob vanReidsma, PytrikFadda, CarloMittra, S.Mathur, P.N.Kooistra, L.2017-05-092017-05-09https://hdl.handle.net/10568/80928What are the prospects for citizen science in agriculture? Evidence from three continents on motivation and mobile telephone use of resource-poor farmers