This map shows the geographic impact of H. Verkuijl'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 H. Verkuijl with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites H. Verkuijl more than expected).
This network shows the impact of papers produced by H. Verkuijl. 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 H. Verkuijl. The network helps show where H. Verkuijl may publish in the future.
Co-authorship network of co-authors of H. Verkuijl
This figure shows the co-authorship network connecting the top 25 collaborators of H. Verkuijl.
A scholar is included among the top collaborators of H. Verkuijl 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 H. Verkuijl. H. Verkuijl is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ouma, James Okuro, et al.. (2002). Adoption of Maize Seed and Fertilizer Technologies in Embu District, Kenya. University of Florida Digital Collections (University of Florida).37 indexed citations
4.
Kimani, S.K., et al.. (2001). Determinants of fertilizer and manure use for maize production in Kiambu District, Kenya. CIMMYT eBooks.32 indexed citations
5.
Verkuijl, H., et al.. (2001). Farmers' maize seed systems in Western Oromia, Ethiopia. University of Florida Digital Collections (University of Florida).19 indexed citations
6.
Mwangi, W., et al.. (2001). Gender differentials in agricultural production and decision-making among smallholders in Ada, Lume, and Gimbichu Woredas of the central highlands of Ethiopia. CIMMYT eBooks.59 indexed citations
7.
Taye, Girma, et al.. (2001). Adoption of Improved bread wheat varieties and inorganic fertilizer by small-scale farmers in yelmana densa and farta districts of Northwestern Ethiopia. University of Florida Digital Collections (University of Florida).52 indexed citations
8.
Verkuijl, H., et al.. (2000). Gender differentials in agricultural productivity among smallholders in Ada, Lume and Gimbichu weredas of the central highlands of Ethiopia.. 22(1). 1–23.
9.
Mwangi, W., et al.. (2000). An assessment of the adoption of seed and fertilizer packages and the role of credit in smallholder maize production in Sidama and North Omo Zones, Ethiopia. CIMMYT eBooks.19 indexed citations
10.
Kotu, Bekele Hundie, H. Verkuijl, W. Mwangi, & D.G. Tanner. (2000). Adoption of improved wheat technologies in Adaba and Dodola Woredas of the Bale highlands, Ethiopia. CIMMYT eBooks.52 indexed citations
Mwangi, W., et al.. (1999). Gender differentials in adoption of improved maize production technologies in Mbeya region of the southern highlands of Tanzania. Eastern Africa social science research review. 15(2). 65–77.3 indexed citations
14.
Verkuijl, H., et al.. (1999). Adoption of maize production technologies in lake zone of Tanzania. University of Florida Digital Collections (University of Florida).5 indexed citations
15.
Kaliba, Aloyce R., et al.. (1999). Factors affecting adoption of maize production technologies in central, eastern and western Tanzania.3 indexed citations
16.
Verkuijl, H., et al.. (1998). Farmers' Seed Sources and Management of Bread Wheat in Wolmera Woreda, Ethiopia. CIMMYT eBooks.5 indexed citations
17.
Mwangi, W., et al.. (1998). Adoption of maize production technologies in the Southern Highlands of Tanzania.18 indexed citations
18.
Mwangi, W., et al.. (1998). An assessment of the adoption of seed and fertilizer packages and the role of credit in smallholder maize production in Kakamega and Vihiga Districts, Kenya.25 indexed citations
19.
Mwangi, W., et al.. (1998). Farmers' wheat seed sources and seed management in Chilalo Awraja, Ethiopia.11 indexed citations
20.
Mwangi, W., et al.. (1997). An assessment of factors affecting adoption of maize production technologies in Iganga District, Uganda.16 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.