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.
2008
Abstract
The coastal areas of SE Norway provide suitable conditions for studying soil development with time, because unweathered land surfaces have continuously been raised above sea level by glacio-isostatic uplift since the termination of the last ice age. We investigated Podzol development in a chronosequence of six soils on sandy beach deposits with ages ranging from 2,300 to 9,650 y at the W coast of the Oslofjord. The climate in this area is rather mild with a mean annual temperature of 6 degrees C and an annual precipitation of 975mm (Sandefjord). The youngest soil showed no evidence of pocizolization, while slight lightening of the A horizon of the second soil (3,800 years) indicated initial leaching of organic matter (OM). In the 4,300 y-old soil also Fe and humus accumulation in the B horizon were perceptible, but only the 6,600 y-old and older soils exhibited spodic horizons. Accumulation of OM in the A horizons reached a steady state in <2,300 y, while in the B horizons OM accumulated at increasing rates. pH dropped from 6.6 (H2O)/5-9 (KCI) in the recent beach sand to 4.5 (H2O)/3.8 (KCl) within approx. 4,500 y (pH(H2O))/2,500 y (pH(KCl)) and stayed constant thereafter, which was attributed to sesquioxide buffering. Base saturation showed an exponential decrease with time. Progressive weathering was reflected by increasing Fe-d and Al-d contents, and proceeding podzolization by increasing amounts of pyrophophate- and oxalate-soluble Fe and Al with soil age. These increases could be best described for most Fe and Al fractions by exponential models. Only the increasing amounts of Fe-p could be better described by a power function and those of Fe-o by a linear model.
2007
Abstract
Podzol development was investigated in a chronosequence on sandy beach sediments, the ages of the soils ranging from 2,400 to 8,500 years. All soil properties investigated-the organic matter content of the B horizons, clay content, Fe-o, Al-o, Si-o, Fe-o/Fe-d and Fe-d/Fe-t - tend to increase with advancing podzolization, and are strongly correlated with soil age. Topsoil pH values decrease with age. The characteristic Bh and Bs horizons had developed after approximately 4,000 years.
2003
Abstract
No abstract has been registered
2000
Abstract
No abstract has been registered
1991
Authors
Roar LågbuAbstract
No abstract has been registered