Results 81 to 90 of about 55,247 (248)

Possibilities and limits of reduced primary tillage in organic farming [PDF]

open access: yes, 2002
In two organically cultivated field trials, located in Germany and Greece, effects of reduced primary tillage systems on root and shoot growth of cereals were investigated.
Dimitrios, Bilalis   +3 more
core  

Nachhaltige Entwicklung und Raumordnung

open access: yesRaumforschung und Raumordnung, 1998
Der hier entwickelte Ansatz will zeigen, wie das Konzept „nachhaltige Entwicklung” auf querschnittsorientierte Politikbereiche übertragen werden kann.
Alain Thierstein
doaj   +1 more source

SAFE - Sustainability Assessment For Enterprises: Die Methodik. Ein Instrument zur Unterstützung einer zukunftsfähigen Unternehmens- und Organisationsentwicklung [PDF]

open access: yes
-- In practice, questions of ecological company policy deal much more with technical questions than with organisational ones. In many guides for the implementation of an Environmental Management System the development of the organisation that first has ...
Baedeker, Carolin   +2 more
core  

Challenges and pitfalls of inferring microbial growth rates from lab cultures

open access: yesFrontiers in Ecology and Evolution
IntroductionAfter more than 100 years of generating monoculture batch culture growth curves, microbial ecologists and evolutionary biologists still lack a reference method for inferring growth rates.
Ana-Hermina Ghenu   +7 more
doaj   +1 more source

The rise and fall of major royal jelly proteins during a honeybee (Apis mellifera) workers' life

open access: yesEcology and Evolution, 2019
The genome of the western honeybee (Apis mellifera) harbors nine transcribed major royal jelly protein genes (mrjp1‐9) which originate from a single‐copy precursor via gene duplication.
Dirk Dobritzsch   +4 more
doaj   +1 more source

Organizing phenotypic data—a semantic data model for anatomy

open access: yesJournal of Biomedical Semantics, 2019
Background Currently, almost all morphological data are published as unstructured free text descriptions. This not only brings about terminological problems regarding semantic transparency, which hampers their re-use by non-experts, but the data cannot ...
Lars Vogt
doaj   +1 more source

Relationships between benthic diatom assemblages’ structure and selected environmental parameters in Slovak water reservoirs (Slovakia, Europe)

open access: yesKnowledge and Management of Aquatic Ecosystems, 2016
The main objective of the present study is to describe the structure of benthic diatom communities in 23 water reservoirs in Slovakia classified as heavily modified water bodies.
Fidlerová D., Hlúbiková D.
doaj   +1 more source

Report on the development of political institutions involved in policy elaborations in organic farming for selected European states [PDF]

open access: yes, 2004
As organic farming has become an instrument of European agricultural policy the organic sector is required more and more to get politically active. This report presents results from the EU-funded project EU-CEEOFP on the development of organic farming ...
Michelsen, Johannes   +2 more
core  

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