World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
41
Citations
6293
World Ranking
7736
National Ranking
2753

Gurpal S. Toor publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Gurpal S. Toor sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 144 publications — 38th percentile

38% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Gurpal S. Toor D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Gurpal S. Toor sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 41 D-Index — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Gurpal S. Toor is affiliated with the University of Maryland, College Park in the United States. Their research primarily focuses on environmental science and agricultural and biological sciences, with significant contributions in subfields such as environmental chemistry, soil science, industrial and manufacturing engineering, environmental engineering, and water science and technology.

The scientist's work covers several main topics, including soil and water nutrient dynamics, phosphorus and nutrient management, soil carbon and nitrogen dynamics, urban stormwater management solutions, hydrology and watershed management studies, groundwater and isotope geochemistry, as well as soil erosion and sediment transport.

Gurpal S. Toor has published in a range of scientific journals, with frequent publications appearing in:

  • Water
  • The Science of The Total Environment
  • PLoS ONE
  • Water Research
  • Agronomy

Some of the recent papers authored or co-authored by Toor include:

  • "Composition of nitrogen in urban residential stormwater runoff: Concentrations, loads, and source characterization of nitrate and organic nitrogen," 2020, PLoS ONE
  • "Desalination: From Ancient to Present and Future," 2021, Water
  • "Molecular characterization of dissolved organic nitrogen and phosphorus in agricultural runoff and surface waters," 2022, Water Research
  • "Nitrate-nitrogen transport in streamwater and groundwater in a loess covered region: Sources, drivers, and spatiotemporal variation," 2020, The Science of The Total Environment
  • "Long-term analysis of soil water regime and nitrate dynamics at agricultural experimental site: Field-scale monitoring and numerical modeling using HYDRUS-1D," 2022, Agricultural Water Management

Toor has collaborated frequently with several researchers, including:

  • Yun-Ya Yang
  • Emileigh Lucas
  • Taylor Roswall
  • Amy L. Shober
  • Zhaolong Zhu

Best Publications

  • Desalination of Water: a Review

    Natasha C. Darre;Gurpal S. Toor

  • Changes in heavy metal contents in animal feeds and manures in an intensive animal production region of China.

    Hui Wang;Yuanhua Dong;Yunya Yang;Gurpal S. Toor

  • Evaluating nutrient impacts in urban watersheds: Challenges and research opportunities

    Richard O. Carey;George J. Hochmuth;Christopher J. Martinez;Treavor H. Boyer

  • Characterization of organic phosphorus in leachate from a grassland soil

    Gurpal S. Toor;Leo M. Condron;Hong J. Di;Keith C. Cameron

  • Sources and mechanisms of nitrate and orthophosphate transport in urban stormwater runoff from residential catchments.

    Yun-Ya Yang;Gurpal S. Toor

  • Soil organic carbon fractions after 16-years of applications of fertilizers and organic manure in a Typic Rhodalfs in semi-arid tropics.

    K. Banger;G. S. Toor;A. Biswas;S. S. Sidhu

  • Advances in the Characterization of Phosphorus in Organic Wastes: Environmental and Agronomic Applications

    Gurpal S. Toor;Stefan Hunger;J. Derek Peak;J. Thomas Sims

  • δ15N and δ18O Reveal the Sources of Nitrate-Nitrogen in Urban Residential Stormwater Runoff

    Yun-Ya Yang;Gurpal S. Toor

  • Phosphorus speciation in broiler litter and Turkey manure produced from modified diets

    Gurpal S. Toor;J. Derek Peak;J. Thomas Sims

  • A review of the fate and transport of nitrogen, phosphorus, pathogens, and trace organic chemicals in septic systems

    Mary G. Lusk;Gurpal S. Toor;Yun-Ya Yang;Sara Mechtensimer

  • Impact of long-term additions of chemical fertilizers and farm yard manure on carbon and nitrogen sequestration under rice-cowpea cropping system in semi-arid tropics

    K. Banger;S. S. Kukal;G. Toor;K. Sudhir

  • Polycyclic Aromatic Hydrocarbons in Urban Soils of Different Land Uses in Miami, Florida

    Kamaljit Banger;Gurpal S. Toor;Tait Chirenje;Lena Ma

  • Selection of a water-extractable phosphorus test for manures and biosolids as an indicator of runoff loss potential.

    Peter Kleinman;Dan Sullivan;Ann Wolf;Robin Brandt

  • Micropollutants in groundwater from septic systems: Transformations, transport mechanisms, and human health risk assessment

    Yun-Ya Yang;Gurpal S. Toor;P. Chris Wilson;Clinton F. Williams

  • Establishing a Linkage between Phosphorus Forms in Dairy Diets, Feces, and Manures

    Gurpal S. Toor;Barbara J. Cade-Menun;J. Thomas Sims

  • Dissolved organic nitrogen in urban streams: Biodegradability and molecular composition studies.

    Mary G. Lusk;Gurpal S. Toor

  • Phosphorus exchangeability and leaching losses from two grassland soils.

    S. Sinaj;C. Stamm;G. Toor;Leo M. Condron

  • Preferential phosphorus leaching from an irrigated grassland soil

    G. S. Toor;L. M. Condron;B. J. Cade-Menun;H. J. Di

  • A Review of Turfgrass Fertilizer Management Practices: Implications for Urban Water Quality

    Richard O. Carey;George J. Hochmuth;Christopher J. Martinez;Treavor H. Boyer

  • Biodegradability and Molecular Composition of Dissolved Organic Nitrogen in Urban Stormwater Runoff and Outflow Water from a Stormwater Retention Pond

    Mary G. Lusk;Gurpal S. Toor

Frequent Co-Authors

Keith C. Cameron
Keith C. Cameron Lincoln University
Leo M. Condron
Leo M. Condron Lincoln University
Brian E. Haggard
Brian E. Haggard University of Arkansas at Fayetteville
Hong J. Di
Hong J. Di Lincoln University
Barbara J. Cade-Menun
Barbara J. Cade-Menun Agriculture and Agriculture-Food Canada
Zhengxia Dou
Zhengxia Dou University of Pennsylvania
Michael D. Dukes
Michael D. Dukes University of Florida
George A. O'Connor
George A. O'Connor University of Florida
Zhongqi He
Zhongqi He Agricultural Research Service
Francisco J. Escobedo
Francisco J. Escobedo US Forest Service

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