Essays about: "old clay layers"

Found 2 essays containing the words old clay layers.

  1. 1. Do 25 years old skid tracks restrict growth and survival? : a study on growth conditions for the planted regeneration in a rainforest rehabilitation project

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Malin Boström; [2015]
    Keywords : näringsbegränsning; penetrationsmotstånd; bulkdensitet; jordegenskaper; trädtillväxt; nutrient limitation; penetration resistance; bulk density; soil properties; tree growth;

    Abstract : The rainforests of the world are important not only to the countries in which they grow but to the world as a whole. They influence oxygen and water circulation as well as carbon sequestration which in turn affect global radiation and global warming. READ MORE

  2. 2. Determination of dioxins in Cretaceous strata from the South of Sweden. : Can the environmental anthropogenic pollutant dioxin be of natural origin ?

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Kelly GUILBOT; [2012]
    Keywords : old clay layers; octachlorodibenzo-p-dioxin; high resolution gas chromatography-high resolution mass spectrometry; analyzer-isotopic ratio mass spectrometry; isotopic dilution.  ;

    Abstract : Eleven sediment samples from different geological layers and four fossils from the South of Sweden were collected and estimated to be 80 million years old (approximately late of Cretaceous period). The samples were analyzed for polychlorinated dibenzo-p dioxins (PCDD/Fs) to investigate whether these samples are likely to contain dioxins from a natural formation. READ MORE