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Ueli A. Hartwig

Ueli A. Hartwig

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Plant Science and Agronomy 47 2540 46 74 8089

Ueli A. Hartwig publications per year

The chart shows the history of publications by Ueli A. Hartwig between 1987 and 2006, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ueli A. Hartwig published across 20 years, from 1987 to 2006, averaging 3.7 papers a year. Output peaked at 12 publications in 2000. 3 of the 74 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1987 to 2006. Vertical axis: number of publications, 0 to 12. Peak 12 publications in 2000. 1987: 2 publications 1988: 0 publications 1989: 2 publications 1990: 4 publications 1991: 3 publications 1992: 0 publications 1993: 1 publication 1994: 3 publications 1995: 1 publication 1996: 10 publications 1997: 7 publications 1998: 8 publications 1999: 3 publications 2000: 12 publications 2001: 1 publication 2002: 6 publications 2003: 3 publications 2004: 5 publications 2005: 2 publications 2006: 1 publication
1987 2006

74 publications in total across all disciplines

View publications per year as a table
Ueli A. Hartwig: publications per year, 1987 to 2006
Year Publications
1987 2
1988 0
1989 2
1990 4
1991 3
1992 0
1993 1
1994 3
1995 1
1996 10
1997 7
1998 8
1999 3
2000 12
2001 1
2002 6
2003 3
2004 5
2005 2
2006 1
Total 74
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Ueli A. Hartwig publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where Ueli A. Hartwig sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 88 bars. Horizontal axis: publications, 36–40 to 467+. Vertical axis: number of scientists, 0 to 255. Most scientists, 255, have 111–115 publications. The last bar groups every scientist with 467 publications or more. The highlighted bar, 71–75 publications, is where this scientist sits. 36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36–40 publications 467+

This scientist: 74 publications — 8th percentile

8% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

View publications distribution as a table
Number of Plant Science and Agronomy scientists by publication count, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
Publications Scientists This scientist
36–40 2
41–45 7
46–50 40
51–55 58
56–60 60
61–65 107
66–70 130
71–75 153 74
76–80 191
81–85 199
86–90 206
91–95 218
96–100 226
101–105 227
106–110 247
111–115 255
116–120 253
121–125 233
126–130 219
131–135 201
136–140 194
141–145 176
146–150 157
151–155 147
156–160 151
161–165 159
166–170 137
171–175 128
176–180 126
181–185 98
186–190 114
191–195 100
196–200 90
201–205 71
206–210 98
211–215 70
216–220 86
221–225 61
226–230 58
231–235 53
236–240 64
241–245 39
246–250 46
251–255 51
256–260 36
261–265 44
266–270 35
271–275 30
276–280 33
281–285 35
286–290 36
291–295 26
296–300 26
301–305 31
306–310 30
311–315 21
316–320 29
321–325 14
326–330 15
331–335 15
336–340 17
341–345 15
346–350 12
351–355 17
356–360 18
361–365 12
366–370 11
371–375 6
376–380 6
381–385 11
386–390 9
391–395 10
396–400 8
401–405 4
406–410 9
411–415 11
416–420 4
421–425 7
426–430 4
431–435 3
436–440 5
441–445 8
446–450 6
451–455 7
456–460 5
461–465 6
466 2
467+ 99
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Ueli A. Hartwig D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where Ueli A. Hartwig sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 80 bars. Horizontal axis: D-Index, 30 to 109+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 34 D-Index. The last bar groups every scientist with 109 D-Index or more. The highlighted bar, 47 D-Index, is where this scientist sits. 30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 47 D-Index — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

View D-Index distribution as a table
Number of Plant Science and Agronomy scientists by D-index, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
D-Index Scientists This scientist
30 200
31 236
32 253
33 283
34 288
35 240
36 246
37 243
38 247
39 229
40 232
41 230
42 228
43 219
44 193
45 164
46 158
47 143 47
48 131
49 127
50 122
51 122
52 110
53 102
54 98
55 79
56 85
57 88
58 91
59 62
60 61
61 59
62 54
63 61
64 59
65 58
66 41
67 49
68 39
69 32
70 40
71 47
72 38
73 28
74 29
75 28
76 22
77 21
78 25
79 26
80 19
81 16
82 12
83 16
84 14
85 11
86 17
87 13
88 10
89 12
90 18
91 16
92 16
93 17
94 12
95 8
96 9
97 9
98 11
99 12
100 5
101 8
102 4
103 11
104 5
105 9
106 7
107 4
108 8
109+ 99
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Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Ecosystem
  • Botany

His main research concerns Agronomy, Lolium perenne, Trifolium repens, Nitrogen fixation and Ecosystem. His Lolium perenne research includes themes of Monoculture, Soil water, Soil fertility and Repens. His Trifolium repens research is classified as research in Botany.

The Terrestrial ecosystem research Ueli A. Hartwig does as part of his general Ecosystem study is frequently linked to other disciplines of science, such as Carbon sequestration, therefore creating a link between diverse domains of science. His Terrestrial ecosystem research is multidisciplinary, incorporating elements of Soil organic matter, Primary production and Biomass. His work carried out in the field of Perennial plant brings together such families of science as Nutrient, Nitrogen cycle, Carbon sink and Rhizobium leguminosarum.

His most cited work include:

  • Progressive Nitrogen Limitation of Ecosystem Responses to Rising Atmospheric Carbon Dioxide (956 citations)
  • Growth response of Trifolium repens L. and Lolium perenne L. as monocultures and bi‐species mixture to free air CO2 enrichment and management (219 citations)
  • Stimulation of Symbiotic N2 Fixation in Trifolium repens L. under Elevated Atmospheric pCO2 in a Grassland Ecosystem. (200 citations)

What are the main themes of his work throughout his whole career to date?

Ueli A. Hartwig spends much of his time researching Agronomy, Trifolium repens, Lolium perenne, Nitrogen fixation and Botany. Ueli A. Hartwig has included themes like Nutrient, Ecosystem, Soil fertility and Horticulture in his Agronomy study. Ueli A. Hartwig has researched Ecosystem in several fields, including Biomass and Temperate climate.

His research integrates issues of Soil biology, Soil carbon, Soil water and Repens in his study of Trifolium repens. His biological study spans a wide range of topics, including Monoculture, Carbon dioxide, Human fertilization and Nitrate. His Botany research is multidisciplinary, relying on both Molecular biology, Nitrogenase, Nitrogen cycle and Rhizobia.

He most often published in these fields:

  • Agronomy (64.91%)
  • Trifolium repens (40.35%)
  • Lolium perenne (40.35%)

What were the highlights of his more recent work (between 2002-2006)?

  • Agronomy (64.91%)
  • Lolium perenne (40.35%)
  • Trifolium repens (40.35%)

In recent papers he was focusing on the following fields of study:

Agronomy, Lolium perenne, Trifolium repens, Soil water and Ecology are his primary areas of study. His Agronomy research incorporates elements of Arbuscular mycorrhiza and Biodiversity. His Lolium perenne research is multidisciplinary, incorporating perspectives in Denitrification and Carbon dioxide.

His Trifolium repens research incorporates themes from Monoculture and Nitrogen cycle. Ueli A. Hartwig works mostly in the field of Soil water, limiting it down to concerns involving Nitrogen fixation and, occasionally, Soil processes, Soil fertility and Botany. His Grassland, Ecosystem, Plant ecology and Species richness study in the realm of Ecology connects with subjects such as Altitude.

Between 2002 and 2006, his most popular works were:

  • Progressive Nitrogen Limitation of Ecosystem Responses to Rising Atmospheric Carbon Dioxide (956 citations)
  • Ten years of free-air CO2 enrichment altered the mobilization of N from soil in Lolium perenne L. swards (84 citations)
  • Denitrification in grass swards is increased under elevated atmospheric CO2 (83 citations)

In his most recent research, the most cited papers focused on:

  • Ecology
  • Ecosystem
  • Botany

Ueli A. Hartwig focuses on Carbon dioxide, Lolium perenne, Ecosystem, Soil organic matter and pCO2. His Carbon dioxide study combines topics in areas such as Biomass and Perennial plant, Fertilizer, Agronomy. His study in the fields of Terrestrial ecosystem and Primary production under the domain of Ecosystem overlaps with other disciplines such as Carbon sequestration.

His study with Soil organic matter involves better knowledge in Ecology. His pCO2 research incorporates Denitrification, Environmental chemistry, Nitrous oxide, Botany and Nitrification.

Best Publications

  • Progressive Nitrogen Limitation of Ecosystem Responses to Rising Atmospheric Carbon Dioxide

    Yiqi Luo;Bo Su;William S. Currie;Jeffrey S. Dukes

  • Growth response of Trifolium repens L. and Lolium perenne L. as monocultures and bi‐species mixture to free air CO2 enrichment and management

    Thomas Hebeisen;Andreas Lüscher;Silvia Zanetti;Bernt Fischer

  • A Chalcone and Two Related Flavonoids Released from Alfalfa Roots Induce nod Genes of Rhizobium meliloti

    Carl A. Maxwell;Ueli A. Hartwig;Cecillia M. Joseph;Donald A. Phillips

  • Stimulation of Symbiotic N2 Fixation in Trifolium repens L. under Elevated Atmospheric pCO2 in a Grassland Ecosystem.

    S. Zanetti;U. A. Hartwig;A. Luscher;T. Hebeisen

  • Flavonoids Released Naturally from Alfalfa Seeds Enhance Growth Rate of Rhizobium meliloti

    Ueli A. Hartwig;Cecillia M. Joseph;Donald A. Phillips

  • Evidence that P deficiency induces N feedback regulation of symbiotic N2 fixation in white clover (Trifolium repens L.)

    JoséP.F. Almeida;Ueli A. Hartwig;Marco Frehner;Josef Nösberger

  • The regulation of symbiotic N2 fixation: a conceptual model of N feedback from the ecosystem to the gene expression level

    Ueli A. Hartwig

  • Soil gas fluxes of N2O, CH4 and CO2 beneath Lolium perenne under elevated CO2: The Swiss free air carbon dioxide enrichment experiment

    P. Ineson;P.A. Coward;U.A. Hartwig

  • Chrysoeriol and Luteolin Released From Alfalfa Seeds Induce Nod Genes in Rhizobium Meliloti

    Ueli A. Hartwig;Carl A. Maxwell;Cecillia M. Joseph;Donald A. Phillips

  • The effects of elevated CO2 on symbiotic N2 fixation: a link between the carbon and nitrogen cycles in grassland ecosystems

    J. F. Soussana;J. F. Soussana;U. A. Hartwig;U. A. Hartwig

  • Does nitrogen nutrition restrict the CO 2 response of fertile grassland lacking legumes

    S. Zanetti;U. A. Hartwig;C. van Kessel;A. Lüscher

  • Yield response of Lolium perenne swards to free air CO2 enrichment increased over six years in a high N input system on fertile soil

    Markus Daepp;Daniel Suter;José P. F. Almeida;Hubert Isopp

  • Phosphorus deficiency increases the argon-induced decline of nodule nitrogenase activity in soybean and alfalfa

    Jean-Jacques Drevon;Ueli A. Hartwig

  • Microbial community changes in the rhizospheres of white clover and perennial ryegrass exposed to free air carbon dioxide enrichment (FACE)

    Marcus Schortemeyer;Ueli A. Hartwig;George R. Hendrey;Michael J. Sadowsky

  • Direct evidence that symbiotic N2 fixation in fertile grassland is an important trait for a strong response of plants to elevated atmospheric CO2.

    Andreas Lüscher;Ueli A. Hartwig;Daniel Suter;Josef Nösberger

  • Carbon-13 input and turn-over in a pasture soil exposed to long-term elevated atmospheric CO2

    Chris Van Kessel;Jennifer Nitschelm;William R. Horwath;David Harris

  • Net soil carbon input under ambient and elevated CO2 concentrations: isotopic evidence after 4 years

    Chris Van Kessel;William R. Horwath;Ueli Hartwig;David Harris

  • Denitrification in grass swards is increased under elevated atmospheric CO2

    Elizabeth Baggs;Michael Richter;G. Cadisch;U. A. Hartwig

  • Influence of an Elevated Atmospheric CO2 Content on Soil and Rhizosphere Bacterial Communities Beneath Lolium perenne and Trifolium repens under Field Conditions

    Unknown

  • Ten years of free-air CO2 enrichment altered the mobilization of N from soil in Lolium perenne L. swards

    Manuel K. Schneider;Andreas Lüscher;Michael Richter;Urs Aeschlimann

  • Source-sink relations in Lolium perenne L. as reflected by carbohydrate concentrations in leaves and pseudo-stems during regrowth in a free air carbon dioxide enrichment (FACE) experiment*

    B. U. Fischer;M. Frehner;T. Hebeisen;S. Zanetti

  • Nitrous oxide emissions from grass swards during the eighth year of elevated atmospheric pCO2 (Swiss FACE)

    Elizabeth Baggs;M. Richter;U. A. Hartwig;G. Cadisch

  • Symbiotic N2 fixation of various legume species along an altitudinal gradient in the Swiss Alps

    Katja A. Jacot;Andreas Lüscher;Josef Nösberger;Ueli A. Hartwig

  • Soil moisture and potassium affect the performance of symbiotic nitrogen fixation in faba bean and common bean

    U. Ravi Sangakkara;Ueli A. Hartwig;Josef Nösberger

  • Elevated atmospheric CO2 alters microbial population structure in a pasture ecosystem

    Constanza M. Montealegre;Chris Van Kessel;Jurg M. Blumenthal;Hor Gil Hur

Frequent Co-Authors

George R. Hendrey
George R. Hendrey City University of New York
Chris van Kessel
Chris van Kessel University of California, Davis
Georg Cadisch
Georg Cadisch University of Hohenheim
William R. Horwath
William R. Horwath University of California, Davis
Michael J. Sadowsky
Michael J. Sadowsky University of Minnesota
Elizabeth M. Baggs
Elizabeth M. Baggs University of Edinburgh

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