Bodemkwaliteit vanuit bodemecologisch perspectief
A micromorphological study of pedogenic processes in an evolutionary soil sequence formed in late quaternary rhyolitic t...
The influence of time as a soil forming factor was studied on an evolutionary sequence of five soils (1850 radiocarbo years BP-ca. 120,000 BP) developed in rhyolitic tephra deposits in New Zealand. New micromorphological observations were combined with existing macromorphological, chemical, textural, and clay mineralogical analyses to assess the ex...
The influence of percolation rate on the weathering rates of silicates in an E horizon of an Umbric Albaqualf
Weathering rates from laboratory experiments are generally one or two orders of magnitude larger than field weathering rates. To obtain more information on this gap a large undisturbed soil column was percolated with a hydrochloric/sulphuric acid solution at rates of 0.15-0.89 cm/d. The percolate from the soil column was simulated with a dynamic mu...
Landscape formation and soil genesis in volcanic parent materials in humid tropical lowlands of Costa Rica
The influence of volcanism on landscape genesis, and formation of soils on volcanic parent material was studied in the Atlantic lowland of Costs Rica. This lowland is a subduction basin of tectonic origin, in which thick alluvial and marine sediments are accumulated. At its southwestern side it is bordered by active volcanoes. The climate of the ar...
Development and duration of accelerated degradation of nematicides in different soils
The development and duration of accelerated degradation of nematicides were studied in incubation experiments with soils from three experimental fields that had been treated annually for three to ten years with aldicarb, oxamyl, ethoprophos, fenamiphos or 1,3-dichloropropene. Highly accelerated degradation rates were measured for aldicarb, oxamyl a...
Methane emission from wetland rice fields
Methane (CH 4 ) is an important greenhouse gas and plays a key role in tropospheric and stratospheric chemistry. Wetland rice fields are an important source of methane, accounting for approximately 20% of the global anthropogenic methane emission. Methane fluxes from wetland rice fields in the Philippines were monitored with a closed chamber techni...
Transformation of 3-chloroallyl alcohol in water-saturated subsoil studied with a column method
The performance of a newly developed column method for pesticide transformation rate measurements in the subsoil was tested using (Z)- and (E)-3-chloroallyl alcohol as model compounds. The subsoil columns were filled in situ. In the column experiment the half-life ranged from 0.5-5.2 d for (Z)-3-chloroallyl alcohol and from 1.0-5.5 d for (E)-3-chlo...
Soil pollution and soil protection
This book was compiled from lecture handouts prepared for the international postgraduate course on soil quality, entitled 'Soil Pollution and Soil Protection' given jointly by the universities of Wageningen (The Netherlands), Gent and Leuven (Belgium), under the auspices of the international Training Centre (PHLO) of Wageningen Agricultural Univers...
Interactie tussen rassen en proefplaatsen bij witlof = Interaction between varieties and locations in witloof chicory tr...
Transformation of aldicarb sulfoxide and aldicarb sulfone in four water-saturated sandy subsoils
Accurate transformation rates of pesticide residues in aquifer material are needed to predict the ultimate effects of pesticide leaching on drinking-water resources. Even slow transformation rates in the groundwater zone can lead to substantial reduction of the concentrations. In this study the transformation of the oxidation products of aldicarb w...
