World's Best Scientists 2026 revealed!
Stewart Ledgard

Stewart Ledgard

D-Index & Metrics

Plant Science and Agronomy

D-Index
51
Citations
9128
World Ranking
2027
National Ranking
27

Overview

What is he best known for?

The fields of study he is best known for:

  • Agriculture
  • Ecology
  • Agronomy

Stewart Ledgard mostly deals with Agronomy, Grazing, Pasture, Greenhouse gas and Nitrous oxide. His Agronomy research includes elements of Leaching, Dairy farming, Nitrogen cycle, Denitrification and Nitrate. Stewart Ledgard has researched Nitrogen cycle in several fields, including Soil water, Lolium perenne and Trifolium repens.

His Grazing research incorporates themes from Nitrogen fixation, Nitrate leaching and Drainage. In his research on the topic of Pasture, Temperate climate, Silage, Land use, Eco-efficiency and Agricultural science is strongly related with Intensive farming. His work in Nitrous oxide tackles topics such as Carbon dioxide which are related to areas like Soil management, Effluent and Methane.

His most cited work include:

  • Nitrogen inputs and losses from clover/grass pastures grazed by dairy cows, as affected by nitrogen fertilizer application (259 citations)
  • Nitrogen cycling in low input legume-based agriculture, with emphasis on legume/grass pastures (236 citations)
  • Eco-efficiency of intensification scenarios for milk production in New Zealand (230 citations)

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

Agronomy, Pasture, Grazing, Greenhouse gas and Leaching are his primary areas of study. His Agronomy research incorporates elements of Nitrification, Nitrous oxide, Soil water, Nitrate and Animal science. His work deals with themes such as Perennial plant, Lysimeter, Manure and Trifolium repens, which intersect with Pasture.

His Grazing study combines topics in areas such as Fertilizer, Nitrogen fixation, Drainage, Denitrification and Lolium perenne. His Greenhouse gas research is multidisciplinary, incorporating elements of Life-cycle assessment, Agriculture, Carbon dioxide and Agricultural science. His work carried out in the field of Leaching brings together such families of science as Dairy farming, Nutrient and Temperate climate.

He most often published in these fields:

  • Agronomy (55.56%)
  • Pasture (42.86%)
  • Grazing (25.40%)

What were the highlights of his more recent work (between 2017-2021)?

  • Life-cycle assessment (15.87%)
  • Pasture (42.86%)
  • Greenhouse gas (21.43%)

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

Stewart Ledgard mainly focuses on Life-cycle assessment, Pasture, Greenhouse gas, Manure and Agronomy. His studies deal with areas such as Agricultural engineering and Sustainability as well as Life-cycle assessment. The various areas that Stewart Ledgard examines in his Pasture study include Perennial plant, Monoculture, Lysimeter, Biomass and Grazing.

The Greenhouse gas study combines topics in areas such as Reactive nitrogen, Animal science, Land use and Agricultural science. His studies in Manure integrate themes in fields like Soil classification, Ultisol, Fertilizer and Diazotroph. The study incorporates disciplines such as Nitrate and Leaching in addition to Agronomy.

Between 2017 and 2021, his most popular works were:

  • Long-term application of lime or pig manure rather than plant residues suppressed diazotroph abundance and diversity and altered community structure in an acidic Ultisol (37 citations)
  • Global environmental costs of China's thirst for milk (26 citations)
  • Using alternative forage species to reduce emissions of the greenhouse gas nitrous oxide from cattle urine deposited onto soil (25 citations)

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

  • Agriculture
  • Ecology
  • Carbon dioxide

The scientist’s investigation covers issues in Manure, Life-cycle assessment, Agronomy, Greenhouse gas and Land use. His research in Life-cycle assessment focuses on subjects like Manure management, which are connected to Milking, Environmental impact assessment and Toxicology. His work on Pasture, Fertilizer and Straw as part of general Agronomy study is frequently connected to Lime, therefore bridging the gap between diverse disciplines of science and establishing a new relationship between them.

Stewart Ledgard has included themes like Trifolium repens, Loam, Forage, Grazing and Lolium perenne in his Pasture study. His research integrates issues of Reactive nitrogen, Cattle feeding and Agricultural science in his study of Greenhouse gas. His study in Land use is interdisciplinary in nature, drawing from both Legume, Crop and Animal feed.

Best Publications

  • Biological nitrogen fixation in mixed legume/grass pastures

    Unknown

  • Nitrogen inputs and losses from clover/grass pastures grazed by dairy cows, as affected by nitrogen fertilizer application

    S. F. Ledgard;J. W. Penno;M. S. Sprosen

  • Eco-efficiency of intensification scenarios for milk production in New Zealand

    Claudine Basset-Mens;Stewart Ledgard;Mark Boyes

  • Nitrogen cycling in low input legume-based agriculture, with emphasis on legume/grass pastures

    Stewart F. Ledgard

  • The impact of various parameters on the carbon footprint of milk production in New Zealand and Sweden

    Anna Flysjö;Anna Flysjö;Maria Henriksson;Christel Cederberg;Stewart Ledgard

  • The interaction between milk and beef production and emissions from land use change – critical considerations in life cycle assessment and carbon footprint studies of milk

    Anna Flysjö;Anna Flysjö;Christel Cederberg;Maria Henriksson;Stewart Ledgard

  • Environmental impacts of grazed clover/grass pastures

    S. Ledgard;R. Schils;J. Eriksen;J. Luo

  • Nutrient management in New Zealand pastures— recent developments and future issues

    R. M. Monaghan;M. J. Hedley;H. J. Di;R. W. McDowell

  • Management options to reduce nitrous oxide emissions from intensively grazed pastures: A review

    J. Luo;C.A.M. de Klein;S.F. Ledgard;S. Saggar

  • How does co-product handling affect the carbon footprint of milk? Case study of milk production in New Zealand and Sweden

    Anna Flysjö;Anna Flysjö;Christel Cederberg;Maria Henriksson;Stewart Ledgard

  • Nitrogen fixation by white clover in pastures grazed by dairy cows: Temporal variation and effects of nitrogen fertilization

    S.F. Ledgard;M.S. Sprosen;J.W. Penno;G.S. Rajendram

  • Fate of 15N labelled urine on four soil types

    T.J. Clough;S.F. Ledgard;M.S. Sprosen;M.J. Kear

  • Long-term application of lime or pig manure rather than plant residues suppressed diazotroph abundance and diversity and altered community structure in an acidic Ultisol

    Yongxin Lin;Guiping Ye;Deyan Liu;Stewart Ledgard

  • Transfer of fixed nitrogen from white clover to associated grasses in swards grazed by dairy cows, estimated using 15N methods

    Unknown

  • Uncertainty of global warming potential for milk production on a New Zealand farm and implications for decision making

    Claudine Basset-Mens;Francis M. Kelliher;Francis M. Kelliher;Stewart Ledgard;Neil Cox

  • Verifying the nitrification to immobilisation ratio (N/I) as a key determinant of potential nitrate loss in grassland and arable soils.

    Elizabeth A. Stockdale;David J. Hatch;Daniel V. Murphy;Stewart F. Ledgard

  • OVERSEER® nutrient budgets - moving towards on-farm resource accounting

    D.M. Wheeler;S.F. Ledgard;C.A.M. de Klein;R.M. Monaghan

  • Nitrous oxide emissions from animal urine application on a New Zealand pasture

    J. Luo;S. B. Lindsey;S. F. Ledgard

  • Short-term nitrogen fluxes in grassland soils under different long-term nitrogen management regimes

    Stewart F. Ledgard;Steve C. Jarvis;David J. Hatch

  • Nitrous Oxide Emissions from New Zealand Agriculture – key Sources and Mitigation Strategies

    Cecile A. M. de Klein;Stewart F. Ledgard

  • The effectiveness of a granular formulation of dicyandiamide (DCD) in limiting nitrate leaching from a grazed dairy pasture.

    R. M. Monaghan;L. C. Smith;S. F. Ledgard

  • An analysis of environmental and economic implications of nil and restricted grazing systems designed to reduce nitrate leaching from New Zealand dairy farms. I. Nitrogen losses

    C. A. M. de Klein;S. F. Ledgard

  • Application of life cycle assessment to sheep production systems: investigating co-production of wool and meat using case studies from major global producers

    Stephen G. Wiedemann;Stewart F. Ledgard;Beverley K. Henry;Ming-Jia Yan

  • Animal treading stimulates denitrification in soil under pasture

    John C. Menneer;John C. Menneer;Stewart Ledgard;Chris McLay;Warwick Silvester

  • Water footprinting – A comparison of methods using New Zealand dairy farming as a case study

    M.A. Zonderland-Thomassen;S.F. Ledgard

  • Water footprint of beef cattle and sheep produced in New Zealand: water scarcity and eutrophication impacts

    M.A. Zonderland-Thomassen;M. Lieffering;S.F. Ledgard

  • Environmental impacts and resource use of Australian beef and lamb exported to the USA determined using life cycle assessment

    Stephen Wiedemann;Eugene McGahan;Caoilinn Murphy;Ming-Jia Yan

Frequent Co-Authors

Jiafa Luo
Jiafa Luo AgResearch
Lin Ma
Lin Ma Chinese Academy of Sciences
Zhaohai Bai
Zhaohai Bai Chinese Academy of Sciences
Nanthi Bolan
Nanthi Bolan University of Western Australia
S. C. Jarvis
S. C. Jarvis Rothamsted Research
Jørgen Eriksen
Jørgen Eriksen Aarhus University
Weixin Ding
Weixin Ding Chinese Academy of Sciences
Gerard L. Velthof
Gerard L. Velthof Wageningen University & Research
David Pacheco
David Pacheco New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC)

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Best Scientists Citing Stewart Ledgard

Trending Scientists

Recently Published Articles