Dirk Heinrichs

Kreditanstalt für Wiederaufbau

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

M. R. Kilcher

Agriculture and Agri-Food Canada

Kerstin Krellenberg

University of Vienna

Henning Nuissl

Humboldt-Universität zu Berlin

Mirko Goletz

Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Daniel Krajzewicz

Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Juliane Welz

Fraunhofer Center for International Management and Knowledge Economy

T. Lawrence

University of the West Indies

Sigrun Kabisch

Helmholtz Centre for Environmental Research

Benjamin Heldt

Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Bernd Hansjürgens

Helmholtz Centre for Environmental Research

Cooperative Institutions

Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Helmholtz Centre for Environmental Research

Agriculture and Agri-Food Canada

Humboldt-Universität zu Berlin

Technische Universität Berlin

University of Stuttgart

Millar College of the Bible

Saskatchewan Ministry of Agriculture

Karlsruhe Institute of Technology

Pontificia Universidad Católica de Chile

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Accessibility for All. What data is crucial for cities to better plan transport to increase accessibility

Dirk Heinrichs

Source

Cite

Citations (0)

PASTURE AND FODDER ATTRIBUTES OF OAT VARIETIES

Canadian Journal of Plant Science (1964)

Dirk Heinrichs G. K. Harris

Oat varieties recommended for grain production in Saskatchewan were evaluated for relative pasture and fodder attributes on dry land and irrigated land. The results showed that there were no significant differences in forage yield between any of them but that several did differ significantly in protein content. The total yield of forage was greatest if harvesting was done once, at maturity only, but the protein yield was the lowest. In regrowth potential the varieties differed little from one another at any stage. All varieties displayed a much better capacity for regrowth if cut before the flowering stage than after. Varieties differed in resistance to being pulled out of the soil, Fortune requiring the most force and Exeter the least. The overall results showed little advantage of any one variety over another for hay and pasture use.

Fodder

Dry land

10.4141/cjps64-036

Cite

Citations (3)

NOTE ON THE SWIFT CURRENT FORAGE PLOT HARVESTER II

Canadian Journal of Plant Science (1963)

J. L. Thompson Dirk Heinrichs

not available

Swift

Plot (graphics)

10.4141/cjps63-120

Cite

Citations (2)

HGF-Forschungsinitiative "Risk Habitat Megacity"

TATuP Zeitschrift für Technikfolgenabschätzung in Theorie und Praxis (2009)

Jürgen Kopfmüller Helmut Lehn Dirk Heinrichs Henning Nuissl Kerstin Krellenberg

Mega-Urbanisierung spielt aufgrund der Ge-

Megacity

10.14512/tatup.18.1.5

Cite

Citations (0)

Varietal differences in rootlet formation and nodulation of alfalfa seedlings.

A.G. Kempton Dirk Heinrichs

Source

Cite

Citations (0)

Book Review: Cities and Development

Dirk Heinrichs

10.3828/ipdr.2011.1

Cite

Citations (0)

Urbane Mobilität – in Zukunft Intermodal?

Dirk Heinrichs Rebekka Oostendorp

Source

Cite

Citations (2)

EFFECTS OF ROOT TEMPERATURE AND A SUSPECTED PHYTOTOXIC SUBSTANCE ON THE GROWTH OF ALFALFA

Canadian Journal of Plant Science (1970)

J. D. McELGUNN Dirk Heinrichs

Two alfalfa cultivars, Rambler and Alfa, were grown at two soil fertility levels to assess a phytotoxic effect of two soils on the growth of alfalfa in a growth chamber at three root-zone temperatures. Different root-zone temperatures (10, 15, and 20 C) produced no differential effect on the characteristic unthrifty growth of alfalfa and therefore cannot be recommended as a tool to aid in the assessment of the condition. However, best growth of herbage and roots occurred al 15 C, which appears to be the most suitable temperature for growth of alfalfa in growth chambers. Addition of fertilizer did not amend the phytotoxic soil effect and the two cultivars reacted in a near-equal manner to the condition.

10.4141/cjps70-056

Cite

Citations (15)

VARIATION OF CHEMICAL CONSTITUENTS AND MORPHOLOGICAL CHARACTERS WITHIN AND BETWEEN ALFALFA POPULATIONS

Canadian Journal of Plant Science (1969)

Dirk Heinrichs J. E. Troelsen F. G. Warder

A total of 326 alfalfa plants, classified into five populations, were grown in three replicates in the greenhouse and studied for variability for the following characters: leaf size, internode between branches, interval between flowering, dry matter of leaves and stems at two cuttings, percent leaf at two cuttings, in vitro digestibility, and contents of crude fiber, ether extract, nitrogen, phosphorus, sulfur, potassium, magnesium, and calcium in leaves and stems. The variance analysis showed that there were significant differences between plants for all characters except in vitro digestibility in leaves and ether extract in stems. Components of variance for some characters were nearly as great between populations as within, while for others they were mainly due to within-population variation. The greatest differences occurred between populations classified as M. falcata and M. sativa. The M. media populations resembled the M. sativa population to a greater extent than the M. falcata type. Frequency distribution graphs indicated that the range for the various characters differed considerably, and genotypic differences between plants were indicated for practically all of them. Correlation coefficients between characters, although often significant, generally were of rather small magnitude. However, certain relationships may be useful in a breeding program.

Cutting

10.4141/cjps69-051

Cite

Citations (31)

Autonomous driving, the built environment and policy implications

Transportation Research Part A Policy and Practice (2018)

Eva Fraedrich Dirk Heinrichs Francisco J. Bahamonde-Birke Rita Cyganski

Planner

Transportation planning

Private transport

10.1016/j.tra.2018.02.018

Cite

Citations (142)