Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
1986
Forfattere
Finn Roll-HansenSammendrag
Det er ikke registrert sammendrag
Forfattere
K. KuuselaSammendrag
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Forfattere
Bjørn LangerudSammendrag
The method presented was based on a very simple approach of the forces operating in the pores of porous media. The standardized time (tv) needed to infiltrate a given volume of a liquid into a porous medium in a defined state was throught to be an integrated measure of pore geometry and continuity. The state of the pore system was defined by external suction (S) and medium porosity characterized by the parameters k1 and k2 in the equation tv=k1k2 S-0.5. The method theory was not rejected by experiments with glass beads and selected peat based growth media. The method ranked the media with respect to the probability for satisfactory gas exchange in the order of peat, peat and 26% perlite, peat and 34% perlite, and peat and 44% mineral wool. This ranking was achieved 95 days after the media were filled in containers and exposed to a daily watering procedure. Before this time, the ranking of the media was slightly different, if at all possible. Five days after the containers were filled, only peat and 44% mineral wood was significantly different from the other media. Judged by the standardized time method, the probability for satisfactory gas exchange decreased significantly during the 95 days experiment. This aggravation was supported by measurements of the volume fraction of pores filled with gas. The changes with time were least marked in the medium containing mineral wool.
Forfattere
Tor J. JohansenSammendrag
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Forfattere
Tore SkrøppaSammendrag
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Forfattere
Tore SkrøppaSammendrag
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Sammendrag
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Forfattere
Ø. Austarå Alf Bakke Fred MidtgaardSammendrag
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Forfattere
Ø. Austarå Fred MidtgaardSammendrag
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Forfattere
Lita Greve Fred MidtgaardSammendrag
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