J. Willumsen

451 total citations
13 papers, 356 citations indexed

About

J. Willumsen is a scholar working on Plant Science, Soil Science and Food Science. According to data from OpenAlex, J. Willumsen has authored 13 papers receiving a total of 356 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Plant Science, 3 papers in Soil Science and 3 papers in Food Science. Recurrent topics in J. Willumsen's work include Plant Physiology and Cultivation Studies (4 papers), Potato Plant Research (3 papers) and Agronomic Practices and Intercropping Systems (2 papers). J. Willumsen is often cited by papers focused on Plant Physiology and Cultivation Studies (4 papers), Potato Plant Research (3 papers) and Agronomic Practices and Intercropping Systems (2 papers). J. Willumsen collaborates with scholars based in . J. Willumsen's co-authors include K. Kaack, Karen Koefoed Petersen and Kristian Thorup‐Kristensen and has published in prestigious journals such as The Journal of Horticultural Science and Biotechnology, Biological Agriculture & Horticulture and Acta Horticulturae.

In The Last Decade

J. Willumsen

11 papers receiving 297 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
J. Willumsen	7	303	74	30	28	25	13	356
Yutaka Shinohara Japan	11	382 1.3×	54 0.7×	87 2.9×	56 2.0×	26 1.0×	59	470
E. Matan Israel	10	349 1.2×	84 1.1×	23 0.8×	12 0.4×	13 0.5×	24	405
Anastasios Kotsiras Greece	12	358 1.2×	56 0.8×	62 2.1×	38 1.4×	12 0.5×	22	415
Santino Seabra Júnior Brazil	11	284 0.9×	66 0.9×	38 1.3×	12 0.4×	21 0.8×	77	338
Silvana Ohse Brazil	9	134 0.4×	49 0.7×	35 1.2×	42 1.5×	7 0.3×	40	266
Svjetlana Zeljković Bosnia and Herzegovina	8	381 1.3×	71 1.0×	41 1.4×	15 0.5×	9 0.4×	30	419
Eszter Nemeskéri Hungary	11	341 1.1×	81 1.1×	21 0.7×	5 0.2×	14 0.6×	28	380
A. Belakbir Spain	8	483 1.6×	47 0.6×	49 1.6×	3 0.1×	17 0.7×	15	516
André Alisson Rodrigues da Silva Brazil	14	528 1.7×	94 1.3×	63 2.1×	36 1.3×	8 0.3×	89	567
Paul K. Wahome Eswatini	10	239 0.8×	60 0.8×	42 1.4×	20 0.7×	3 0.1×	32	317

Countries citing papers authored by J. Willumsen

Since Specialization

Citations

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

Fields of papers citing papers by J. Willumsen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of J. Willumsen

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

All Works

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13 of 13 papers shown

Willumsen, J. & Kristian Thorup‐Kristensen. (2001). Effects of Green Manure Crops on Soil Mineral Nitrogen Available for Organic Production of Onion and White Cabbage in Two Contrasting Years. Biological Agriculture & Horticulture. 18(4). 365–384. 19 indexed citations

Willumsen, J.. (2001). EFFECTS OF SUBSTRATE LIMING AND FERTILIZER SUPPLY ON CABBAGE SEEDLINGS GROWN ORGANICALLY IN PLUGS. Acta Horticulturae. 335–342.

Willumsen, J., et al.. (1999). Effects of nitrogen availability and supplementary light on the nitrate content of soil-grown lettuce. The Journal of Horticultural Science and Biotechnology. 74(4). 458–463. 27 indexed citations

Petersen, Karen Koefoed, J. Willumsen, & K. Kaack. (1998). Composition and taste of tomatoes as affected by increased salinity and different salinity sources. The Journal of Horticultural Science and Biotechnology. 73(2). 205–215. 143 indexed citations

Willumsen, J., et al.. (1998). Effects of nitrate, ammonium and chloride application on the yield and nitrate content of soil-grown lettuce. The Journal of Horticultural Science and Biotechnology. 73(5). 698–703. 50 indexed citations

Willumsen, J.. (1997). IMPROVEMENT OF THE PHYSICAL CONDITIONS IN PEAT SUBSTRATES DURING THE GERMINATION OF CABBAGE SEEDS IN ORGANIC FARMING (REFEREED). Acta Horticulturae. 183–190. 5 indexed citations

Willumsen, J., K. Kaack, & Karen Koefoed Petersen. (1996). Yield and blossom-end rot of tomato as affected by salinity and cation activity ratios in the root zone. The Journal of Horticultural Science and Biotechnology. 71. 81–98. 38 indexed citations

Willumsen, J., Karen Koefoed Petersen, & K. Kaack. (1996). Yield and blossom-end rot of tomato as affected by salinity and cation activity ratios in the root zone. Journal of Horticultural Science. 71(1). 81–98. 52 indexed citations

Willumsen, J., et al.. (1993). PRODUCTION OF COMPOST IN A HEAT COMPOSTING PLANT AND TEST OF COMPOST MIXTURES AS GROWING MEDIA FOR GREENHOUSE CULTURES.. Acta Horticulturae. 127–142. 6 indexed citations

10.

Willumsen, J.. (1986). LIMING OF PEAT FOR POT PLANT GROWING. Acta Horticulturae. 205–212. 3 indexed citations

11.

Willumsen, J.. (1984). A COMPARISON OF HYDROPONIC SYSTEMS FOR TOMATOES. Acta Horticulturae. 421–428. 2 indexed citations

12.

Willumsen, J., et al.. (1980). Root disease of lettuce and tomato in water culture systems, caused by Pythium debaryanum Hesse.. 84(1). 1 indexed citations

13.

Willumsen, J.. (1980). PH OF THE FLOWING NUTRIENT SOLUTION. Acta Horticulturae. 191–200. 10 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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