Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2006
Forfattere
Tor J. JohansenSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Forfattere
Fadi Suliman Helen French Lars Egil Haugen Anne Kristine SøvikSammendrag
In order to investigate the influence of biological growth on flow and transport patterns in horizontal subsurface flow constructed wetlands, bromide tracer experiments were conducted in two 3 In long tanks. The tanks were filled with light weight aggregates and shell sand, respectively. The hydraulic conductivity, drainable porosity and dispersivity of the two filter media were determined before and after biological growth. The obtained breakthrough curves of bromide tracer showed that biological growth caused a pronounced reduction in drainable porosity; mainly for shell sand whereas its effect on saturated hydraulic conductivity was negligible. The spatial distribution of the bromide after biological growth in the two filter media showed that the flow occurred preferentially along certain paths. However, in the light-weight aggregates filter medium, biological growth with possible clogging effects seems to reduce the efficiency of some preferential flow paths, increase the retention time, and hence, improves the system treatment efficiency This study showed that selecting a filter medium including coarse fractions to some extent can mitigate the potential negative effects of bioclogging. (c) 2006 Elsevier B.V. All rights reserved.
Sammendrag
No abstract has been registered
Forfattere
T. Salo B Stenberg C. Lundström L.S. Jensen S. Bruun A. Pedersen T.A Breland T. Henriksen Audun Korsæth H. Palmason J. GudmundssonSammendrag
No abstract has been registered
Forfattere
Antti Uotila Henna Penttinen Gunnar SalingreSammendrag
In August – October 2003 three biological control experiments were established near Hyytiälä Forestry Field Station of Helsinki University in southern Finland. Water suspension of mycelia of the basidiomycete Chondrostereum purpureum was inoculated on stumps just after felling in order to examine the impact of inoculation on tree sprouting...
Sammendrag
Organic farming movements have traditionally aimed at a harmonious balance between animal husbandry and crop production on the farm. We bring scientific evidences that this is a prerequisite to maximize the efficiency of nitrogen use. The use of imported feed increases the total nutrient losses to the environment per litre of milk produced.
Sammendrag
Organic farming movements have traditionally aimed at a harmonious balance between animal husbandry and crop production on the farm. We bring scientific evidences that this is a prerequisite to maximize the efficiency of nitrogen use. The use of imported feed increases the total nutrient losses to the environment per litre of milk produced.
Sammendrag
Organic farming movements have traditionally aimed at a harmonious balance between animal husbandry and crop production on the farm. We bring scientific evidences that this is a prerequisite to maximize the efficiency of nitrogen use. The use of imported feed increases the total nutrient losses to the environment per litre of milk produced.