G. F. Ortmann

2.5k total citations
139 papers, 1.7k citations indexed

About

G. F. Ortmann is a scholar working on General Agricultural and Biological Sciences, Economics and Econometrics and Soil Science. According to data from OpenAlex, G. F. Ortmann has authored 139 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 64 papers in General Agricultural and Biological Sciences, 48 papers in Economics and Econometrics and 46 papers in Soil Science. Recurrent topics in G. F. Ortmann's work include Agricultural Innovations and Practices (46 papers), Agricultural risk and resilience (28 papers) and Land Rights and Reforms (20 papers). G. F. Ortmann is often cited by papers focused on Agricultural Innovations and Practices (46 papers), Agricultural risk and resilience (28 papers) and Land Rights and Reforms (20 papers). G. F. Ortmann collaborates with scholars based in South Africa, United States and Mexico. G. F. Ortmann's co-authors include Rudibert King, M C Lyne, Edilegnaw Wale, Stuart Ferrer, M AG Darroch, E. Wale, Munyaradzi Mutenje, Maxwell Mudhara, George F. Patrick and Wesley N. Musser and has published in prestigious journals such as SHILAP Revista de lepidopterología, Ecological Economics and Computers and Electronics in Agriculture.

In The Last Decade

G. F. Ortmann

125 papers receiving 1.4k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
G. F. Ortmann South Africa 22 718 410 385 379 246 139 1.7k
Marijke D’Haese Belgium 27 749 1.0× 561 1.4× 437 1.1× 370 1.0× 349 1.4× 130 2.4k
Devesh Roy United States 23 634 0.9× 525 1.3× 359 0.9× 324 0.9× 221 0.9× 98 1.8k
Colin Poulton United Kingdom 24 1.2k 1.7× 679 1.7× 324 0.8× 536 1.4× 204 0.8× 109 2.4k
M C Lyne South Africa 19 481 0.7× 248 0.6× 268 0.7× 373 1.0× 132 0.5× 104 1.2k
Nick Vink South Africa 21 491 0.7× 463 1.1× 179 0.5× 356 0.9× 178 0.7× 145 1.5k
Nigel Poole United Kingdom 27 528 0.7× 402 1.0× 514 1.3× 161 0.4× 607 2.5× 122 2.5k
Liesbeth Dries Netherlands 23 595 0.8× 408 1.0× 492 1.3× 291 0.8× 175 0.7× 84 1.7k
Steve Wiggins United Kingdom 19 951 1.3× 429 1.0× 164 0.4× 473 1.2× 182 0.7× 84 1.9k
Johann F. Kirsten South Africa 26 1.3k 1.8× 676 1.6× 521 1.4× 645 1.7× 568 2.3× 210 2.9k
Mekbib G. Haile Germany 16 986 1.4× 639 1.6× 250 0.6× 422 1.1× 217 0.9× 28 1.7k

Countries citing papers authored by G. F. Ortmann

Since Specialization
Citations

This map shows the geographic impact of G. F. Ortmann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G. F. Ortmann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. F. Ortmann more than expected).

Fields of papers citing papers by G. F. Ortmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G. F. Ortmann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G. F. Ortmann. The network helps show where G. F. Ortmann may publish in the future.

Co-authorship network of co-authors of G. F. Ortmann

This figure shows the co-authorship network connecting the top 25 collaborators of G. F. Ortmann. A scholar is included among the top collaborators of G. F. Ortmann based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with G. F. Ortmann. G. F. Ortmann is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Baiyegunhi, Lloyd J. S., et al.. (2018). Impact of IntegratedStrigaManagement (ISM) technology on maize productivity in northern Nigeria: A treatment effect approach. African Journal of Science Technology Innovation and Development. 10(3). 335–344. 10 indexed citations
2.
Ortmann, G. F., et al.. (2016). The effect of major income sources on rural household food (in)security: Evidence from Swaziland and implications for policy. Ecology of Food and Nutrition. 55(2). 209–230. 18 indexed citations
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Ortmann, G. F., et al.. (2014). Effects of transaction costs on mushroom producers' choice of marketing channels : implications for access to agricultural markets in Swaziland. South African Journal of Economic and Management Sciences. 17(2). 1–13. 11 indexed citations
5.
Ortmann, G. F., et al.. (2013). Determinants of consumers willingness to purchase East African Highland cooking banana hybrids in Uganda. African Journal of Agricultural Research. 8(9). 780–791. 8 indexed citations
6.
Mutenje, Munyaradzi, G. F. Ortmann, & Stuart Ferrer. (2011). Extraction of non-timber forest products as a coping strategy for HIV/AIDS-afflicted rural households in south-eastern Zimbabwe. African Journal of AIDS Research. 10(3). 195–206. 6 indexed citations
7.
Ortmann, G. F., et al.. (2011). An Economic Evaluation of Soybean-Based Biodiesel Production on Commercial Farms in Kwazulu-Natal, South Africa. Agrekon. 50(3). 68–89. 4 indexed citations
8.
Ortmann, G. F., et al.. (2010). An Economic Evaluation of Soybean-Based Biodiesel Production on Commercial Farms in the Soybean-Producing Regions of KwaZulu-Natal: Some Preliminary Results. AgEcon Search (University of Minnesota, USA). 24. 2 indexed citations
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Ortmann, G. F., et al.. (2006). A production function analysis of commercial dairy farms in the Highlands of Eritrea using ridge regression. Agrekon. 45(2). 225–242. 3 indexed citations
11.
Ortmann, G. F., et al.. (2005). FACTORS INFLUENCING ADOPTION OF LIVESTOCK INSURANCE BY COMMERCIAL DAIRY FARMERS IN THREE ZOBATAT OF ERITREA. Agrekon. 44(2). 172–186. 42 indexed citations
12.
Ferrer, Stuart, et al.. (2003). INTERNET USE AND FACTORS AFFECTING ADOPTION OF INTERNET APPLICATIONS BY SUGARCANE FARM BUSINESSES IN THE KWAZULU-NATAL MIDLANDS. AgEcon Search (University of Minnesota, USA). 6 indexed citations
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Ortmann, G. F., et al.. (1994). Computer use and factors influencing computer adoption among commercial farmers in Natal Province, South Africa. Computers and Electronics in Agriculture. 11(2-3). 183–194. 23 indexed citations
17.
Ortmann, G. F., et al.. (1993). Transaction Costs and Labour Contracting in the South African Forestry Industry. South African Journal of Economics. 61(1). 44–54. 7 indexed citations
18.
Ortmann, G. F.. (1988). Development of a regional planning model: Consideration of demand, supply and risk factors. Development Southern Africa. 5(4). 433–447. 4 indexed citations
19.
Ortmann, G. F.. (1982). DEMAND ANALYSIS OF VEGETABLES AND SUBTROPICAL FRUIT IN SOUTH AFRICA. Agrekon. 21(2). 15–21. 4 indexed citations
20.
Ortmann, G. F.. (1981). THE ECONOMICS OF ESTABLISHING AN INTENSIVE PIG UNIT II: THE USE OF DISCOUNTED CASH FLOW TECHNIQUES. Agrekon. 20(3). 5–8. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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