Union Catalogue of Agricultural Libraries in the Netherlands
The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.
Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.
The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.
As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".
All titles are entered in their original language. Keywords are added to facilitate subject searching.
The database is updated every day and now contains over 830.000 records.
On agar plates more colonies and species of fungi developed from oak leaves from calcareous mull (loose mixed litter and mineral matter) than from those from mor (usually compact litter layer abruptly distinct from underlying soil; without free calcium). Fungal plate counts, mycelial growth and concentration from soil under calcareous mull were lower and plate counts of bacteria and actinomycetes higher than those from mor; those from acid mull were usually intermediate. The characteristics of the fungal flora seemed influenced by water and calcium content through the chemical composition of the vegetation and its litter, and secondly by the physical factors of soil, the saprophagous soil fauna and the non-fungal microflora. The numbers of micro-organisms and mycelial growth in the mineral soil were influenced by temperature, moisture and added fresh litter. Maximum mycelium concentrations in oak soils were in autumn or winter, but not in pine soils.Mycelium was decomposed almost equally fast in mull and mor. The mull had 4-10 times as much chitin-decomposing and mycolytic micro-organisms than mor; mor had more mycophagous oribatid mites, consuming individually 3 times as much in summer than in winter. Fruiting bodies of toadstools were most frequent (partly dependent on soil moisture content) about 2.5 months before mycelium reached maximum concentration. The toadstools were mostly humus and litter fungi in mull, and mycorrhizal fungi in acid mull and mor. Litter fungi occurred in all types.
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