Search Results - "Tybirk, K"

Vegetation diversity of conventional and organic hedgerows in Denmark by Aude, E., Tybirk, K., Bruus Pedersen, M.

“…Many attempts have been made to reduce the impact of modern conventional farming on the environment and semi-natural ecosystems. One of them is organic…”
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Effects of organic farming on field boundary vegetation in Denmark by Petersen, S., Axelsen, J.A., Tybirk, K., Aude, E., Vestergaard, P.

“…The aim of this study was to assess, whether organic dairy farming has increased the biological diversity of field boundary vegetation when compared to…”
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Conservation value of the herbaceous vegetation in hedgerows – does organic farming make a difference? by Aude, E, Tybirk, K, Michelsen, A, Ejrnæs, R, Hald, A.B, Mark, S

“…The aim was to compare and test differences in the conservation value of hedge bottom vegetation on organic and conventional farms. The studied hedgerows (28…”
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Nature quality in organic farming: a conceptual analysis of considerations and criteria in a European context by Tybirk, K, Alroe, H.F, Frederiksen, P

“…Nature quality in relation to farming is a complex field. It involves different traditions and interests, different views of what nature is, and different ways…”
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The EU Acidification Strategy: Sensitivity of calculated emission ceilings for nitrogen and sulphur for Denmark by Bak, J., Tybirk, K.

“…The sensitivity of the calculated emission ceilings to changes and uncertainties in preconditions used in the cost-effective optimisations for the EU…”
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Dynamic oak-scrub to forest succession: Effects of management on understorey vegetation, humus forms and soils by Strandberg, Beate, Kristiansen, Søren M., Tybirk, Knud

“…Active management for preservation of conserved ecosystems is receiving increased attention, as management probably is the most important factor for the…”
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Assessment of the effects of reduced herbicide applications on selected arable weeds by a simulation model by Sønderskov, Mette, Axelsen, Jørgen A., Pedersen, Marianne Bruus, Tybirk, Knud

“…Between 1986 and 2003 the Danish government introduced three Pesticide Action Plans to reduce the pesticide usage. In order to simulate the expected effects of…”
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Oak forest development as a result of historical land-use patterns and present nitrogen deposition by Tybirk, Knud, Strandberg, Beate

“…Historical sources of the use of the forests around the manor Hald during three centuries are used to outline a typical development for many areas on poor…”
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Vegetation analysis along a successional gradient from heath to oak forest by Soerensen, M.M. (Aarhus Univ. (Denmark)), Tybirk, K

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Nordic Empetrum Dominated Ecosystems: Function and Susceptibility to Environmental Changes by Tybirk, K, Nilsson, M-C, Michelsen, A, Kristensen, H L, Shevtsova, A, Strandberg, M T, Johansson, M, Nielsen, KE, Riis-Nielsen, T, Strandberg, B, Johnsen, I

“…This paper reviews the knowledge on crowberry (Empetrum nigrum ssp. nigrum and ssp. hermaphroditum) dominated ecosystems in the Nordic region. Empetrum leaves…”
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Vegetation analysis along a successional gradient from heath to oak forest by Soerensen, M M, Tybirk, K

“…At Hjelm Hede in Denmark where an oak shrub is invading into a heathland the successional process has been studied on poor sandy outwashed plain. The study…”
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