World's Best Scientists 2026 revealed!
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Environmental Sciences
New Zealand
2026

D-Index & Metrics

Environmental Sciences

D-Index
62
Citations
11495
World Ranking
2656
National Ranking
10

G. P. Sparling 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 G. P. Sparling 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: 115 publications — 21st percentile

21% of scientists in this discipline score the same or lower.

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

G. P. Sparling 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 G. P. Sparling 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: 62 D-Index — 74th percentile

74% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Environmental Sciences in New Zealand Leader Award

Overview

G. P. Sparling is affiliated with the University of Waikato in New Zealand. The researcher's career is grounded in academic and scientific work conducted within this institution.

This scientist's record does not include specific publications, co-authors, or documented frequent publication venues, nor are there detailed records of book publications or particular fields and subfields of study associated with their research.

There are no listed recent papers, awards, or distinct research topics available for this individual in the current data set.

The provided information highlights the academic alignment of G. P. Sparling but does not extend to further specifics regarding their research contributions or scientific impact.

Best Publications

  • Ratio of microbial biomass carbon to soil organic carbon as a sensitive indicator of changes in soil organic matter

    Unknown

  • A direct extraction method to estimate soil microbial C: calibration in situ using microbial respiration and 14C labelled cells

    Unknown

  • Decreases in organic C reserves in soils can reduce the catabolic diversity of soil microbial communities

    Bradley P. Degens;Bradley P. Degens;Louis A. Schipper;Graham P. Sparling;Maja Vojvodic-Vukovic

  • Hot-water-soluble C as a simple measure of labile soil organic matter: the relationship with microbial biomass C

    G Sparling;Maja Vojvodić-Vuković;L.A Schipper

  • Is the microbial community in a soil with reduced catabolic diversity less resistant to stress or disturbance

    Bradley P. Degens;Louis A. Schipper;Graham P. Sparling;Louise C. Duncan

  • Estimation of soil microbial c by a fumigation-extraction method: use on soils of high organic matter content, and a reassessment of the kec-factor

    Unknown

  • Modifications to the substrate-induced respiration method to permit measurement of microbial biomass in soils of differing water contents

    Unknown

  • Predicting groundwater nitrate concentrations in a region of mixed agricultural land use: a comparison of three approaches

    Unknown

  • 14C-labelled ryegrass turnover and residence times in soils varying in clay content and mineralogy

    S. Saggar;A. Parshotam;G.P. Sparling;C.W. Feltham

  • Quantifying the contribution from the soil microbail biomass to the extractable P levels of fresh and air-dried soils

    Unknown

  • Soil quality at a national scale in New Zealand.

    G. P. Sparling;L. A. Schipper

  • Increasing the length of hyphae in a sandy soil increases the amount of water-stable aggregates

    B.P. Degens;G.P. Sparling;Lynette Abbott

  • Soil quality monitoring in New Zealand: practical lessons from a 6-year trial

    G.P. Sparling;L.A. Schipper;W. Bettjeman;R. Hill

  • Performance of Soil Condition Indicators Across Taxonomic Groups and Land Uses

    L. A. Schipper;G. P. Sparling

  • Recovery of topsoil characteristics after landslip erosion in dry hill country of New Zealand, and a test of the space-for-time hypothesis

    Graham Sparling;Des Ross;Noel Trustrum;Greg Arnold

  • Effect of short-term legume residue decomposition on soil acidity

    Caixian Tang;G.P. Sparling;C.D.A. Mclay;C. Raphael

  • Microcalorimetry and other methods to assess biomass and activity in soil

    Unknown

  • Interpretation of microbial biomass measurements for soil quality assessment in humid temperate regions

    M. R. Carter;E. G. Gregorich;D. A. Angers;M. H. Beare

  • Changes in microbial heterotrophic diversity along five plant successional sequences

    L.A Schipper;B.P Degens;G.P Sparling;L.C Duncan

  • Use of ergosterol, diaminopimelic acid and glucosamine contents of soils to monitor changes in microbial populations

    Unknown

  • Changes in soil organic C, microbial C and aggregate stability under continuous maize and cereal cropping, and after restoration to pasture in soils from the Manawatu region, New Zealand

    Graham P. Sparling;T. Graham Shepherd;Helen A. Kettles

  • Importance of soil water content when estimating soil microbial C, N and P by the fumigation-extraction methods

    Graham P. Sparling;Andrew W. West

  • Soil quality monitoring in New Zealand: trends and issues arising from a broad-scale survey

    Graham Sparling;Louis Schipper

  • Rates of accumulation of cadmium and uranium in a New Zealand hill farm soil as a result of long-term use of phosphate fertilizer

    Louis A. Schipper;Graham P. Sparling;L.M. Fisk;M.B. Dodd

  • Soil microbial biomass in Amazonian soils: Evaluation of methods and estimates of pool sizes

    B.J. Feigl;G.P. Sparling;D.J. Ross;C.C. Cerri

  • What is Soil Organic Matter Worth

    G. P. Sparling;D. Wheeler;E.-T. Vesely;L. A. Schipper

  • Hydraulic conductivity in soils irrigated with wastewaters of differing strengths: Field and laboratory studies

    G. P. Sparling;J. C. Williamson;G. N. Magesan;L. A. Schipper

  • Comparison of microbial C, N-flush and ATP, and certain enzyme activities of different textured soils subject to gradual drying

    AW West;GP Sparling;TW Speir;JM Wood

  • Pasture and forest soil microbial communities show distinct patterns in their catabolic respiration responses at a landscape scale

    B.A. Stevenson;G.P. Sparling;L.A. Schipper;B.P. Degens

Frequent Co-Authors

Louis A. Schipper
Louis A. Schipper University of Waikato
Des J. Ross
Des J. Ross Landcare Research
Roger L. Parfitt
Roger L. Parfitt Landcare Research
Surinder Saggar
Surinder Saggar Landcare Research
Noel A. Trustrum
Noel A. Trustrum GNS Science

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