| Agricultural cooperatives I: History, theory and problems GF Ortmann, RP King Agrekon 46 (1), 40-68, 2007 | 653 | 2007 |
| Agricultural cooperatives II: can they facilitate access of small-scale farmers in South Africa to input and product markets? GF Ortmann, RP King Agrekon 46 (2), 219-244, 2007 | 265 | 2007 |
| Institutional and governance factors influencing the performance of selected smallholder agricultural cooperatives in KwaZulu-Natal M Chibanda, GF Ortmann, MC Lyne Agrekon 48 (3), 293-315, 2009 | 157 | 2009 |
| Transaction costs and crop marketing in the communal areas of Impendle and Swayimana, KwaZulu-Natal PM Matungul, MC Lyne, GF Ortmann Development Southern Africa 18 (3), 347-363, 2001 | 143 | 2001 |
| Impact of maize storage on rural household food security in Northern Kwazulu-Natal JM Thamaga-Chitja, SL Hendriks, GF Ortmann, M Green Journal of Consumer Sciences 32, 2004 | 122 | 2004 |
| Research on agri-food supply chains in Southern Africa involving small-scale farmers: Current status and future possibilities GF Ortmann, RP King Agrekon 49 (4), 397-417, 2010 | 117 | 2010 |
| Factors influencing adoption of livestock insurance by commercial dairy farmers in three zobatat of Eritrea MA Mohammed, GF Ortmann Agrekon 44 (2), 172-186, 2005 | 114 | 2005 |
| Rural livelihood diversity to manage economic shocks: Evidence from south-east Zimbabwe MJ Mutenje, GF Ortmann, SRD Ferrer, MAG Darroch Agrekon 49 (3), 338-357, 2010 | 102 | 2010 |
| Factors influencing adoption and intensity of adoption of orange flesh sweet potato varieties: Evidence from an extension intervention in Nyanza and Western provinces, Kenya. W Kaguongo, G Ortmann, E Wale, M Darroch, JW Low African Journal of Agricultural Research, 2012 | 97 | 2012 |
| Assessing farmers’ perceptions about climate change: A double-hurdle approach P Hitayezu, E Wale, G Ortmann Climate Risk Management 17, 123-138, 2017 | 93 | 2017 |
| Use of private consultants and other sources of information by large cornbelt farmers GF Ortmann, GF Patrick, WN Musser, D Howard Doster Agribusiness 9 (4), 391-402, 1993 | 90 | 1993 |
| Collective action and participation in irrigation water management: A case study of Mooi River Irrigation Scheme in KwaZulu-Natal Province, South Africa B Muchara, G Ortmann, E Wale, M Mudhara Water SA 40 (4), 699-708, 2014 | 86 | 2014 |
| Management of non-timber forestry products extraction: Local institutions, ecological knowledge and market structure in South-Eastern Zimbabwe MJ Mutenje, GF Ortmann, SRD Ferrer Ecological Economics 70 (3), 454-461, 2011 | 82 | 2011 |
| Small-scale farmers in South Africa: Can agricultural cooperatives facilitate access to input and product markets? GF Ortmann, RP King | 81 | 2006 |
| Adoption of ISO 9000 quality assurance standards by South African agribusiness firms CR Turner, GF Ortmann, MC Lyne Agribusiness: An International Journal 16 (3), 295-307, 2000 | 66 | 2000 |
| Promoting the competitiveness of South African agriculture in a dynamic economic and political environment GF Ortmann Agrekon 44 (3), 286-320, 2005 | 58 | 2005 |
| Problems and opportunities in South African agriculture G Ortmann, C Machethe The challenge of change: Agriculture, land and the South African economy, 47-62, 2003 | 58 | 2003 |
| Improving cooperation to make the South African fresh apple export value chain more competitive PA Hardman, MAG Darroch, GF Ortmann Journal on chain and network science 2 (1), 61-72, 2002 | 56 | 2002 |
| Computer use and factors influencing computer adoption among commercial farmers in Natal Province, South Africa MR Woodburn, GF Ortmann, JB Levin Computers and Electronics in agriculture 11 (2-3), 183-194, 1994 | 53 | 1994 |
| A quantitative assessment of an outsourced agricultural extension service in the Umzimkhulu District of KwaZulu-Natal, South Africa MC Lyne, N Jonas, GF Ortmann The Journal of Agricultural Education and Extension 24 (1), 51-64, 2018 | 44 | 2018 |
Robert P. KingProfessor Emeritus of Applied Economics, University of MinnesotaVerified email at umn.edu
