1. Farm-level adoption and impact of agricultural technology: the case of Russian wheat aphid resistant cultivars in South Africa Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Van Rooyen, C.J. (author), Marasas, C.N. (author), Anandajayawekeram, P. (author), and Millard, S. (author) Format: Abstract Publication Date: 2005 Published: South Africa Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 174 Document Number: C29690 Journal Title: South African Journal of Agricultural Extension Journal Title Details: 34 Notes: Via African Journals Online.