2026 Niels Erik Nielsen: 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	50	2167	1998	18	18	94	8327

Overview

What is he best known for?

The fields of study he is best known for:

Ecology
Agriculture
Botany

Niels Erik Nielsen focuses on Root hair, Agronomy, Soil water, Hordeum vulgare and Poaceae. His Root hair research incorporates a variety of disciplines, including Botany, Root system and Mycorrhiza. His Agronomy research integrates issues from Host, Nutrient and Soil depth.

His work deals with themes such as Environmental chemistry, Phytotoxicity, Air pollution and Pollution, which intersect with Soil water. The various areas that he examines in his Poaceae study include Cultivar and Horticulture. His Cultivar research is multidisciplinary, relying on both Dry matter and Crop.

His most cited work include:

Root traits as tools for creating phosphorus efficient crop varieties (197 citations)
Root hairs and phosphorus acquisition of wheat and barley cultivars (189 citations)
Soil surface CO2 flux as an index of soil respiration in situ: a comparison of two chamber methods. (170 citations)

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

His main research concerns Agronomy, Soil water, Nutrient, Root hair and Botany. His studies deal with areas such as Loam and Plant physiology as well as Agronomy. His Plant physiology research includes elements of Soil horizon and Soil solution.

He has researched Soil water in several fields, including Environmental chemistry and Water content. The study incorporates disciplines such as Animal science, Soil pH, Calliandra and Crop in addition to Nutrient. His studies in Botany integrate themes in fields like Dry season and Microcosm.

He most often published in these fields:

Agronomy (49.21%)
Soil water (42.86%)
Nutrient (25.40%)

What were the highlights of his more recent work (between 2002-2008)?

Agronomy (49.21%)
Soil water (42.86%)
Root hair (20.63%)

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

His primary areas of study are Agronomy, Soil water, Root hair, Root system and Nutrient. Crop, Intercropping, Dry matter and Germination are the core of his Agronomy study. His Soil water research incorporates themes from Environmental chemistry, Nitrogen cycle and Green manure.

In his study, Biotechnology is strongly linked to Soil type, which falls under the umbrella field of Root system. The Nutrient study combines topics in areas such as Dry season, Calliandra calothyrsus, Calliandra and Seeding. His research integrates issues of Legume, Poaceae, Hordeum vulgare and Plant nutrition in his study of Horticulture.

Between 2002 and 2008, his most popular works were:

Root traits as tools for creating phosphorus efficient crop varieties (197 citations)
Barley genotypes with long root hairs sustain high grain yields in low-P field (163 citations)
Variation in phosphorus uptake efficiency by genotypes of cowpea (Vigna unguiculata) due to differences in root and root hair length and induced rhizosphere processes (67 citations)

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

Ecology
Agriculture
Botany

Niels Erik Nielsen spends much of his time researching Root hair, Agronomy, Root system, Soil water and Soil fertility. In his papers, he integrates diverse fields, such as Root hair, Cycling, Plant physiology, Root length, Soil volume and Vigna. His Root system research includes themes of Soil type and Biotechnology.

His Soil water research is multidisciplinary, incorporating elements of Dry matter, Crop residue, Cajanus, Intercropping and Crop yield. His Soil fertility research incorporates elements of Hydroponics, Horticulture and Poaceae, Hordeum vulgare.

Best Publications

Simulation of nitrogen dynamics and biomass production in winter wheat using the Danish simulation model DAISY

S. Hansen;H. E. Jensen;N. E. Nielsen;H. Svendsen

629
Citations
Root traits as tools for creating phosphorus efficient crop varieties

Tara Singh Gahoonia;Niels Erik Nielsen

348
Citations
Root hairs and phosphorus acquisition of wheat and barley cultivars

Tara Singh Gahoonia;Debbie Care;Niels Erik Nielsen

328
Citations
Effect of heavy metals on peppermint and cornmint

Valcho D. Zheljazkov;Niels E. Nielsen

315
Citations
Barley genotypes with long root hairs sustain high grain yields in low-P field

Tara S. Gahoonia;Niels E. Nielsen

296
Citations
Soil surface CO2 flux as an index of soil respiration in situ: a comparison of two chamber methods.

L.S. Jensen;T. Mueller;K.R. Tate;D.J. Ross

294
Citations
The effects of root-induced pH changes on the depletion of inorganic and organic phosphorus in the rhizosphere

Tara Singh Gahoonia;Niels Erik Nielsen

252
Citations
VESICULAR‐ARBUSCULAR MYCORRHIZA IN FIELD‐GROWN CROPS

Tver Jakobsen;Niels Erik Nielsen

247
Citations
Direct evidence on participation of root hairs in phosphorus ( 32 P) uptake from soil

Tara Singh Gahoonia;Niels Erik Nielsen

247
Citations
A root hairless barley mutant for elucidating genetic of root hairs and phosphorus uptake

Tara S. Gahoonia;Niels Erik Nielsen;Priyavadan A. Joshi;Ahmed Jahoor

234
Citations
Variation in root hairs of barley cultivars doubled soil phosphorus uptake

Tara S. Gahoonia;Niels E. Nielsen

226
Citations
Temporal variation of C and N mineralization, microbial biomass and extractable organic pools in soil after oilseed rape straw incorporation in the field

Lars Stoumann Jensen;Torsten Mueller;Jakob Magid;Niels Erik Nielsen

224
Citations
Microbial community composition and functional diversity in the rhizosphere of maize

Ellen Kandeler;Petra Marschner;Dagmar Tscherko;Tara Singh Gahoonia

191
Citations
Phosphorus (P) acquisition of cereal cultivars in the field at three levels of P fertilization

Tara S. Gahoonia;Niels E. Nielsen;Ole B. Lyshede

178
Citations
Barley genotypes differ in activity of soluble extracellular phosphatase and depletion of organic phosphorus in the rhizosphere soil

Farouq Asmar;Tara Singh;Gahoonia;Niels Erik Nielsen

177
Citations
Turnover of carbon and nitrogen in a sandy loam soil following incorporation of chopped maize plants, barley straw and blue grass in the field

T. Mueller;L.S. Jensen;N.E. Nielsen;J. Magid

176
Citations
Ammonia volatilization during storage of cattle and pig slurry: effect of surface cover

Unknown

155
Citations
Seasonal variation in organic and inorganic phosphorus fractions of temperate-climate sandy soils

Jakob Magid;Niels Erik Nielsen

148
Citations
Phosphorus (P) uptake and growth of a root hairless barley mutant (bald root barley, brb) and wild type in low- and high-P soils

Unknown

140
Citations
Root-released organic acids and phosphorus uptake of two barley cultivars in laboratory and field experiments.

Tara S Gahoonia;Farouq Asmar;Henriette Giese;Gunnar Gissel-Nielsen

131
Citations
Modelling and measuring the effect of nitrogen catch crops on the nitrogen supply for succeeding crops

Kristian Thorup-Kristensen;Niels Erik Nielsen

127
Citations
Phosphorus depletion in the rhizosphere as influenced by soil moisture

Tara Singh Gahoonia;Sherow Raza;Niels Erik Nielsen

124
Citations
Yields and accumulations of N and P in farmer-managed intercrops of maize–pigeonpea in semi-arid Africa

Fidelis M. Myaka;Webster D. Sakala;Joseph J. Adu-Gyamfi;Donwell Kamalongo

123
Citations
Differences Among Genotypes of Corn in the Kinetics of P Uptake 1

Unknown

82
Citations
Root traits as tools for creating phosphorus efficient crop varieties : New challenges for rhizosphere research at the entrance of the 21st Century

Tara Singh Gahoonia;Niels Erik Nielsen

1
Citations