World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
38
Citations
5204
World Ranking
8677
National Ranking
3100

James E. Ayars 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 James E. Ayars 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: 119 publications — 23rd percentile

23% of scientists in this discipline score the same or lower.

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

James E. Ayars 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 James E. Ayars 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: 38 D-Index — 12th percentile

12% of scientists in this discipline score the same or lower.

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

Overview

James E. Ayars is affiliated with the Agricultural Research Service in the United States. Their research spans multiple scientific domains, primarily focusing on Agricultural and Biological Sciences, Environmental Science, and Engineering. Within these broader fields, their work covers specialized subfields including Soil Science, Global and Planetary Change, Plant Science, and Civil and Structural Engineering.

The main topics addressed in Ayars' research include irrigation practices and water management, plant water relations and carbon dynamics, soil and unsaturated flow, plant physiology and cultivation studies, and plant growth and nutrition. These areas reflect an emphasis on understanding and improving the management of water resources and plant responses in agricultural systems.

Ayars has contributed to the scientific literature with publications in venues such as the International Journal of Fruit Science. A notable recent paper is titled "White Plastic and Deficit Irrigation Improve Pomegranate Production," published in 2021 in the International Journal of Fruit Science.

  • White Plastic and Deficit Irrigation Improve Pomegranate Production (2021), International Journal of Fruit Science

The scientist frequently collaborates with peers including Daniele Zaccaria, Khaled M. Bali, Dennis L. Corwin, Dong Wang, and D. J. Makus. These collaborations have resulted in multiple joint publications, highlighting a collaborative approach within their research projects.

  • Daniele Zaccaria
  • Khaled M. Bali
  • Dennis L. Corwin
  • Dong Wang
  • D. J. Makus

Best Publications

  • Subsurface drip irrigation of row crops: a review of 15 years of research at the Water Management Research Laboratory

    Unknown

  • Grapevine water use and the crop coefficient are linear functions of the shaded area measured beneath the canopy

    L.E. Williams;J.E. Ayars

  • Identifying Soil Properties that Influence Cotton Yield Using Soil Sampling Directed by Apparent Soil Electrical Conductivity

    D. L. Corwin;S. M. Lesch;P. J. Shouse;R. Soppe

  • Subsurface drip irrigation in California—Here to stay?

    Unknown

  • Frequency Dependence of the Complex Permittivity and Its Impact on Dielectric Sensor Calibration in Soils

    T. J. Kelleners;D. A. Robinson;P. J. Shouse;J. E. Ayars

  • The resource potential of in-situ shallow ground water use in irrigated agriculture: a review

    J. E. Ayars;E. W. Christen;R. W. Soppe;W. S. Meyer

  • Controlled drainage for improved water management in arid regions irrigated agriculture

    James E. Ayars;Evan W. Christen;John Hornbuckle

  • Water use by drip-irrigated late-season peaches

    J. E. Ayars;R. S. Johnson;C. J. Phene;T. J. Trout

  • Calibration of Capacitance Probe Sensors using Electric Circuit Theory

    T. J. Kelleners;R. W. O. Soppe;D. A. Robinson;M. G. Schaap

  • Water use of Thompson Seedless grapevines as affected by the application of gibberellic acid (GA3) and trunk girdling – practices to increase berry size

    L.E. Williams;J.E. Ayars

  • Calibration of capacitance probe sensors in a saline silty clay soil

    T. J. Kelleners;R. W. O. Soppe;J. E. Ayars;T. H. Skaggs

  • Characterizing ground water use by safflower using weighing lysimeters

    R.W.O. Soppe;J.E. Ayars

  • Long term use of saline water for irrigation

    Unknown

  • Use of Saline Water from a Shallow Water Table by Cotton

    James E. Ayars;Richard A. Schoneman

  • Subsurface drainage design and management in irrigated areas of Australia

    Evan W. Christen;James E. Ayars;John W. Hornbuckle

  • Weighing Lysimeters for Developing Crop Coefficients and Efficient Irrigation Practices for Vegetable Crops

    David R. Bryla;Thomas J. Trout;James E. Ayars

  • Agricultural drainage management, quality and disposal issues in North America†

    Chandra A. Madramootoo;William R. Johnston;James E. Ayars;Robert O. Evans

  • Realizing the potential of integrated irrigation and drainage water management for meeting crop water requirements in semi-arid and arid areas

    J.E. Ayars;R.B. Hutmacher;R.A. Schoneman;R.W.O. Soppe

  • A processing method for weighing lysimeter data and comparison to micrometeorological ETo predictions

    Patrick Vaughan;T.J. Trout;James E. Ayars

  • Occurrence and measurement of salinity stratification in shallow groundwater in the Murrumbidgee Irrigation Area, south-eastern Australia

    Unknown

  • Weighing lysimeters aid study of water relations in tree and vine crops

    R.S. Johnson;L.E. Williams;J.E. Ayars;T.J. Trout

  • Uptake of shallow groundwater by cotton: growth stage, groundwater salinity effects in column lysimeters

    R.B. Hutmacher;J.E. Ayars;S.S. Vail;A.D. Bravo

  • Controlled water table management as a strategy for reducing salt loads from subsurface drainage under perennial agriculture in semi-arid Australia

    John Hornbuckle;John Hornbuckle;Evan W Christen;James E Ayars;Richard David Faulkner

  • Growth and Production of Young Peach Trees Irrigated by Furrow, Microjet, Surface Drip, or Subsurface Drip Systems

    David R. Bryla;Thomas J. Trout;James E. Ayars;R. Scott Johnson

  • Drip Irrigation of Cotton with Saline Drainage Water

    J. E. Ayars;R. B. Hutmacher;R. A. Schoneman;S. S. Vail

  • Drainage Design for Water Quality Management: Overview

    J. C. Guitjens;J. E. Ayars;M. E. Grismer;L. S. Willardson

Frequent Co-Authors

Peter J. Shouse
Peter J. Shouse Agricultural Research Service
Todd H. Skaggs
Todd H. Skaggs US Department of Agriculture
Thomas J. Trout
Thomas J. Trout Agricultural Research Service
Gary S. Banuelos
Gary S. Banuelos Agricultural Research Service
Dennis L. Corwin
Dennis L. Corwin Agricultural Research Service
Steven R. Evett
Steven R. Evett Agricultural Research Service
William P. Kustas
William P. Kustas Agricultural Research Service
Donald L. Suarez
Donald L. Suarez Agricultural Research Service
Mark E. Grismer
Mark E. Grismer University of California, Davis
Joseph G. Alfieri
Joseph G. Alfieri Agricultural Research Service

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