2026 Harry Clark: Plant Science and Agronomy Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Plant Science and Agronomy	43	3175	2956	37	33	85	8459

Overview

What is he best known for?

The fields of study he is best known for:

Ecology
Agriculture
Ecosystem

Harry Clark focuses on Pasture, Agronomy, Agriculture, Trifolium repens and Lolium perenne. Harry Clark has researched Pasture in several fields, including Animal feed, Dry matter, Animal science and Temperate climate. His study in the field of Forage, Hay and Forb also crosses realms of Trait.

His Agriculture research integrates issues from Climate change mitigation, Greenhouse gas, Land use and Ecosystem services. His Trifolium repens research includes themes of Poa pratensis, Paspalum dilatatum, Anthoxanthum odoratum and Seedling. The study incorporates disciplines such as Germination and Sowing in addition to Lolium perenne.

His most cited work include:

Plant trait responses to grazing – a global synthesis (682 citations)
Agriculture, Forestry and Other Land Use (AFOLU) (397 citations)
How much land based greenhouse gas mitigation can be achieved without compromising food security and environmental goals (338 citations)

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

Harry Clark mainly focuses on Agronomy, Pasture, Animal science, Methane and Dry matter. His research integrates issues of Methane emissions and Water content in his study of Agronomy. His Pasture research also works with subjects such as

Ecosystem services most often made with reference to Agriculture,
Nitrification which intersects with area such as Excretion.

His work deals with themes such as Ruminant and Poaceae, Botany, which intersect with Animal science. His biological study spans a wide range of topics, including Silage, Grazing and Greenhouse gas. His Dry matter research includes elements of Methanobrevibacter, Environmental management system and Animal feed.

He most often published in these fields:

Agronomy (42.65%)
Pasture (30.88%)
Animal science (30.88%)

What were the highlights of his more recent work (between 2011-2020)?

Greenhouse gas (19.12%)
Agronomy (42.65%)
Methane (29.41%)

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

The scientist’s investigation covers issues in Greenhouse gas, Agronomy, Methane, Agriculture and Dry matter. His study in Perennial plant and Forage is carried out as part of his Agronomy studies. His work carried out in the field of Methane brings together such families of science as Silage and Analytical chemistry.

The various areas that Harry Clark examines in his Agriculture study include Climate change mitigation, Land use and Ecosystem services. His Dry matter research is multidisciplinary, incorporating elements of Methane emissions, Environmental management system, National inventory and Lolium perenne. His work focuses on many connections between Lolium perenne and other disciplines, such as Ruminant, that overlap with his field of interest in Animal science.

Between 2011 and 2020, his most popular works were:

Agriculture, Forestry and Other Land Use (AFOLU) (397 citations)
How much land based greenhouse gas mitigation can be achieved without compromising food security and environmental goals (338 citations)
How much do direct livestock emissions actually contribute to global warming (50 citations)

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

Ecology
Agriculture
Ecosystem

His primary scientific interests are in Agriculture, Land management, Climate change mitigation, Land use and Ecosystem services. His Agriculture study integrates concerns from other disciplines, such as Global warming, Greenhouse effect, Livestock and Greenhouse gas. His study in Land management is interdisciplinary in nature, drawing from both Food security, Land use, land-use change and forestry and Sustainable development.

His Climate change mitigation study incorporates themes from Environmental resource management and Environmental quality.

Best Publications

Agriculture, Forestry and Other Land Use (AFOLU)

Pete Smith;Mercedes Bustamante;Helal Ahammad;Harry Clark

1468
Citations
Plant trait responses to grazing – a global synthesis

Sandra Díaz;Sandra Lavorel;Sue McINTYRE;Valeria Falczuk

1365
Citations
How much land based greenhouse gas mitigation can be achieved without compromising food security and environmental goals

Pete Smith;Helmut Haberl;Alexander Popp;Karl Heinz Erb

718
Citations
Water relations in grassland and desert ecosystems exposed to elevated atmospheric CO2

J. A. Morgan;D. E. Pataki;Christian Körner;H. Clark

546
Citations
Methane emissions from dairy cows measured using the sulfur hexafluoride (SF6) tracer and chamber techniques.

C. Grainger;T. Clarke;S.M. McGinn;M.J. Auldist

375
Citations
The temperature dependence of dicyandiamide (DCD) degradation in soils: A data synthesis

F.M. Kelliher;F.M. Kelliher;T.J. Clough;H. Clark;G. Rys

240
Citations
How much do direct livestock emissions actually contribute to global warming

Andy Reisinger;Harry Clark

210
Citations
The effects of elevated CO2 on seed production and seedling recruitment in a sheep-grazed pasture.

G. R. Edwards;H. Clark;P. C. D. Newton

148
Citations
How necessary and feasible are reductions of methane emissions from livestock to support stringent temperature goals

Andy Reisinger;Harry Clark;Annette L. Cowie;Jeremy Emmet-Booth

131
Citations
Effects of Elevated CO2 and Simulated Seasonal Changes in Temperature on the Species Composition and Growth Rates of Pasture Turves

P.C.D. Newton;H. Clark;C.C. Bell;E.M. Glasgow

128
Citations
Assessment of the sulphur hexafluoride (SF6) tracer technique using respiration chambers for estimation of methane emissions from sheep

C.S. Pinares-Patiño;K.R. Lassey;R.J. Martin;G. Molano

121
Citations
Challenges and Prospects for Agricultural Greenhouse Gas Mitigation Pathways Consistent With the Paris Agreement

Sinead Leahy;Harry Clark;Andy Reisinger

115
Citations
Chloroform decreases rumen methanogenesis and methanogen populations without altering rumen function in cattle

T. Knight;R.S. Ronimus;D. Dey;C. Tootill

113
Citations
Plant growth and soil processes in temperate grassland communities at elevated CO2

P. C. D. NEWTONt;H. Clark;C. C. Bell;E. M. Glasgow

107
Citations
Methane and global environmental change

Dave S. Reay;Pete Smith;Torben R. Christensen;Rachael H. James

106
Citations
Reliability of the sulfur hexafluoride tracer technique for methane emission measurement from individual animals: an overview

C. S. Pinares-Patiño;H. Clark

97
Citations
Repeatability of methane emissions from sheep

C S Pinares-Patino;J C McEwan;K G Dodds;E A Cardenas

96
Citations
Methane emissions and digestive physiology of non-lactating dairy cows fed pasture forage

C. S. Pinares-Patiño;G. C. Waghorn;A. Machmüller;B. Vlaming

89
Citations
The effect of level of intake and forage quality on methane production by sheep

G. Molano;H. Clark

84
Citations
Scaling methane emissions from vegetation.

Anthony J. Parsons;Paul C.D. Newton;Harry Clark;Francis M. Kelliher

84
Citations
Effects of grazing willow fodder blocks upon methane production and blood composition in young sheep.

C.A. Ramírez-Restrepo;T.N. Barry;A. Marriner;N. López-Villalobos

81
Citations
Physiological and morphological responses to elevated CO2 and a soil moisture deficit of temperate pasture species growing in an established plant community

H. Clark;P.C.D. Newton;D.J. Barker

75
Citations
Within- and between-animal variance in methane emissions in non-lactating dairy cows

J. B. Vlaming;N. Lopez-Villalobos;I. M. Brookes;S. O. Hoskin

73
Citations
Chapter 11 - Agriculture, forestry and other land use (AFOLU)

P. Smith;H. Clark;H. Dong;E.A. Elsiddig

42
Citations