J.B.J. van Ryssen

489 total citations
39 papers, 347 citations indexed

About

J.B.J. van Ryssen is a scholar working on Agronomy and Crop Science, Nutrition and Dietetics and Animal Science and Zoology. According to data from OpenAlex, J.B.J. van Ryssen has authored 39 papers receiving a total of 347 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Agronomy and Crop Science, 14 papers in Nutrition and Dietetics and 10 papers in Animal Science and Zoology. Recurrent topics in J.B.J. van Ryssen's work include Ruminant Nutrition and Digestive Physiology (14 papers), Selenium in Biological Systems (12 papers) and Trace Elements in Health (6 papers). J.B.J. van Ryssen is often cited by papers focused on Ruminant Nutrition and Digestive Physiology (14 papers), Selenium in Biological Systems (12 papers) and Trace Elements in Health (6 papers). J.B.J. van Ryssen collaborates with scholars based in South Africa, United States and Eswatini. J.B.J. van Ryssen's co-authors include C.E.J. Van Rensburg, Catharina C. Grant, Mike Peel, N.H. Casey, George E. Rottinghaus, J.F. De Villiers, P. Channon, E.C. Webb, W.A. Van Niekerk and Magdalena Bosman and has published in prestigious journals such as Journal of Dairy Science, Poultry Science and Animal Feed Science and Technology.

In The Last Decade

J.B.J. van Ryssen

39 papers receiving 300 citations

Peers

J.B.J. van Ryssen

ASZ

ACS

ECOLO

F. M. Pate United States

S. M. Miller Australia

GE Donald Australia

Ueli Wyss Switzerland

E. Thuen Norway

Cody Wright United States

J. W. Heard Australia

H. M. Arelovich Argentina

Rafael Mezzomo Brazil

H. Ammar Spain

F. M. Pate United States

J.B.J. van Ryssen

92 ×0.8

81 ×0.8

89 ×0.9

ASZ

175 ×2.0

ACS

12 ×0.2

ECOLO

Citations per year, relative to J.B.J. van Ryssen J.B.J. van Ryssen (= 1×) peers F. M. Pate

Countries citing papers authored by J.B.J. van Ryssen

Since Specialization

Citations

This map shows the geographic impact of J.B.J. van Ryssen'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 J.B.J. van Ryssen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J.B.J. van Ryssen more than expected).

Fields of papers citing papers by J.B.J. van Ryssen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J.B.J. van Ryssen. 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 J.B.J. van Ryssen. The network helps show where J.B.J. van Ryssen may publish in the future.

Co-authorship network of co-authors of J.B.J. van Ryssen

This figure shows the co-authorship network connecting the top 25 collaborators of J.B.J. van Ryssen. A scholar is included among the top collaborators of J.B.J. van Ryssen 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 J.B.J. van Ryssen. J.B.J. van Ryssen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ryssen, J.B.J. van, et al.. (2014). Different levels of macadamia oil cake meal, and wood ash vs. feed lime as dietary sources of calcium on bone characteristics of slow-growing chickens. South African Journal of Animal Science. 44(1). 71–71. 6 indexed citations

Ryssen, J.B.J. van, et al.. (2012). Time-dependent effect of selenium supplementation on the relationship between selenium concentrations in whole blood and plasma of sheep. Small Ruminant Research. 112(1-3). 85–90. 6 indexed citations

Ryssen, J.B.J. van, et al.. (2008). Changes in nutrient composition of kikuyu foggage as winter progressed. South African Journal of Animal Science. 38(4). 342–349. 2 indexed citations

Rensburg, C.E.J. Van, et al.. (2006). In Vitro and In Vivo Assessment of Humic Acid as an Aflatoxin Binder in Broiler Chickens. Poultry Science. 85(9). 1576–1583. 85 indexed citations

Webb, Emily C., et al.. (2000). Trace mineral status of the African Buffalo (Syncerus caffer) in the Kruger National Park. South African Journal of Animal Science. 30(4). 2 indexed citations

Webb, E.C., et al.. (2000). Sensory characteristics of meat and composition of carcass fat from sheep fed diets containing various levels of broiler litter. South African Journal of Animal Science. 30(1). 9 indexed citations

Ryssen, J.B.J. van, et al.. (2000). The chemical composition of leaves from indigenous fodder trees in South Africa. South African Journal of Animal Science. 30(4). 7 indexed citations

Ryssen, J.B.J. van, et al.. (1997). The effect of high broiler litter diets as survival ration on the health of sheep. Journal of the South African Veterinary Association. 68(4). 121–124. 9 indexed citations

Ryssen, J.B.J. van, et al.. (1997). The accuracy of indirect methods for predicting feed intake of sheep at steady-state intake and following abrupt changes in intake. Livestock Production Science. 48(2). 117–127. 3 indexed citations

10.

Ryssen, J.B.J. van, et al.. (1997). Metabolism of selenium and copper in sheep with and without sodium bicarbonate supplementation. The Journal of Agricultural Science. 128(3). 357–364. 6 indexed citations

11.

Ryssen, J.B.J. van, et al.. (1995). Short Communications / Kort Mededelings Chemical composition of carcass sawdust residue as a predictor of the chemical composition of sheep carcasses. South African Journal of Animal Science. 25(2). 50–52. 1 indexed citations

12.

Ryssen, J.B.J. van. (1993). Suitability of a lime source high in manganese as a feed ingredient for sheep. South African Journal of Animal Science. 23(3). 115–118. 1 indexed citations

13.

Ryssen, J.B.J. van. (1991). Effect of monensin and its metabolites in broiler litter on sheep consuming the broiler litter. Journal of the South African Veterinary Association. 62(3). 94–99. 4 indexed citations

14.

Ryssen, J.B.J. van, et al.. (1990). Ram fertility unaffected by high molybdenum intakes.. South African Journal of Animal Science. 20(1). 10–15. 2 indexed citations

15.

Ryssen, J.B.J. van, et al.. (1987). The influence of breed and dietary molybdenum on the concentration of copper in tissues of sheep. South African Journal of Animal Science. 17(2). 104–110. 2 indexed citations

16.

Ryssen, J.B.J. van, et al.. (1980). The effects of various levels of dietary copper and molybdenum on copper and molybdenum metabolism in sheep. South African Journal of Animal Science. 10(1). 37–47. 6 indexed citations

17.

Ryssen, J.B.J. van, et al.. (1980). The influence of dietary sulphur on copper and molybdenum metabolism in sheep. South African Journal of Animal Science. 10(1). 49–57. 9 indexed citations

18.

Ryssen, J.B.J. van. (1979). The influence of molybdenum and sulphur on sheep receiving high levels of copper and broiler litter in their rations. South African Journal of Animal Science. 9(1). 21–25. 5 indexed citations

19.

Ryssen, J.B.J. van, et al.. (1977). Minerals and nitrogen in poultry manure. South African Journal of Animal Science. 7(1). 195–199. 7 indexed citations

20.

Ryssen, J.B.J. van, et al.. (1966). Permissible restriction of feed intake in digestion trials with roughages.. 9. 1005–1010. 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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