J.B.J. van Ryssen

489 citations

39 papers · 347 indexed · h-index 10

Animal Science and Zoology top 5%
- Animal Nutrition and Physiology 6
- Rabbits: Nutrition, Reproduction, Health 6
Agronomy and Crop Science top 10%
- Ruminant Nutrition and Digestive Physiology 14
- Reproductive Physiology in Livestock 2
Nutrition and Dietetics top 10%
- Selenium in Biological Systems 12
- Trace Elements in Health 6
Forestry
Plant Science
- Moringa oleifera research and applications 2
Genetics
- Genetic and phenotypic traits in livestock 5

Co-authors: 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
Cited by: Animal Science and Zoology Agronomy and Crop Science Nutrition and Dietetics
Journals: Journal of Dairy Science (1 paper)Poultry Science (1 paper)Animal Feed Science and Technology (3 papers)
Partner nations: South Africa United States Eswatini

In The Last Decade

J.B.J. van Ryssen

39 papers receiving 300 citations

Peers

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

The 21 scholars most cited alongside J.B.J. van Ryssen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with J.B.J. van Ryssen Line = papers co-authored together J.B.J. van Ryssen links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	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 ·J.B.J. van Ryssen,Mashilo Alpheus Phosa,C.E.J. Van Rensburg	2014	6
2	Time-dependent effect of selenium supplementation on the relationship between selenium concentrations in whole blood and plasma of sheep Small Ruminant Research ·J.B.J. van Ryssen,R.J. Coertze,M.F. Smith	2012	6
3	Changes in nutrient composition of kikuyu foggage as winter progressed South African Journal of Animal Science ·Esmari Rautenbach,J.B.J. van Ryssen,W.A. Van Niekerk	2008	2
4	In Vitro and In Vivo Assessment of Humic Acid as an Aflatoxin Binder in Broiler Chickens Poultry Science ·(unknown),(unknown),C.E.J. Van Rensburg,J.B.J. van Ryssen,N.H. Casey,George E. Rottinghaus	2006	85
5	Trace mineral status of the African Buffalo (Syncerus caffer) in the Kruger National Park South African Journal of Animal Science ·M Erasmus,Emily C. Webb,J.B.J. van Ryssen	2000	2
6	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 ·D.T. Mavimbela,E.C. Webb,J.B.J. van Ryssen,Magdalena Bosman	2000	9
7	The chemical composition of leaves from indigenous fodder trees in South Africa South African Journal of Animal Science ·M.S. Lukhele,J.B.J. van Ryssen	2000	7
8	The effect of high broiler litter diets as survival ration on the health of sheep Journal of the South African Veterinary Association ·D.T. Mavimbela,J.B.J. van Ryssen,R. Last	1997	9
9	The accuracy of indirect methods for predicting feed intake of sheep at steady-state intake and following abrupt changes in intake Livestock Production Science ·J.P. Pienaar,J.B.J. van Ryssen	1997	3
10	Metabolism of selenium and copper in sheep with and without sodium bicarbonate supplementation The Journal of Agricultural Science ·F. Hartmann,J.B.J. van Ryssen	1997	6
11	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 ·S. W. Kock,J.B.J. van Ryssen,D. Davies	1995	1
12	Suitability of a lime source high in manganese as a feed ingredient for sheep South African Journal of Animal Science ·J.B.J. van Ryssen	1993	1
13	Effect of monensin and its metabolites in broiler litter on sheep consuming the broiler litter Journal of the South African Veterinary Association ·J.B.J. van Ryssen	1991	4
14	Ram fertility unaffected by high molybdenum intakes. South African Journal of Animal Science ·J.B.J. van Ryssen,A. W. Lishman,J. P. Kitching	1990	2
15	The influence of breed and dietary molybdenum on the concentration of copper in tissues of sheep South African Journal of Animal Science ·Timothy John Harrison,J.B.J. van Ryssen,P. R. Barrowman	1987	2
16	The effects of various levels of dietary copper and molybdenum on copper and molybdenum metabolism in sheep South African Journal of Animal Science ·J.B.J. van Ryssen,W.J. Stielau	1980	6
17	The influence of dietary sulphur on copper and molybdenum metabolism in sheep South African Journal of Animal Science ·J.B.J. van Ryssen,W.J. Stielau	1980	9
18	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 ·J.B.J. van Ryssen	1979	5
19	Minerals and nitrogen in poultry manure South African Journal of Animal Science ·J.B.J. van Ryssen,P. Channon,W.J. Stielau	1977	7
20	Permissible restriction of feed intake in digestion trials with roughages. J.B.J. van Ryssen,W.J. Stielau	1966	1

About J.B.J. van Ryssen

J.B.J. van Ryssen is a scholar working on Agronomy and Crop Science, Animal Science and Zoology and Nutrition and Dietetics, having authored 39 papers that have together received 347 indexed citations. Recurring topics across this work include Ruminant Nutrition and Digestive Physiology (14 papers), Selenium in Biological Systems (12 papers), Trace Elements in Health (6 papers), Animal Nutrition and Physiology (6 papers), Rabbits: Nutrition, Reproduction, Health (6 papers), Genetic and phenotypic traits in livestock (5 papers), Reproductive Physiology in Livestock (2 papers) and Moringa oleifera research and applications (2 papers). The work is most often cited by research in Animal Science and Zoology (95 citations), Agronomy and Crop Science (88 citations) and Nutrition and Dietetics (116 citations). J.B.J. van Ryssen has collaborated with scholars based in South Africa, United States and Eswatini. Frequent 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. Their work appears in journals such as Journal of Dairy Science, Poultry Science and Animal Feed Science and Technology.

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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