Hydrocarbon biomarkers and isotopic composition of carbon from bitumoids and oils of mesozoic sediments in the western part of the yenisei-khatanga oil and gas region...the northeast of the West-Siberian plate, two groups of oils and bitumoids are identified, genetically associated with organic matter, mainly sapropel type (I group) and mainly humus type (II group)....
Geographic ecology of soil oribatid mites in deciduous forests...relatively simple patterns of spatial distribution and habitat use since 2 groups of species can be defined: "regionally specialist' (RS) species which are rare and restrict their humus type occupancy, and "regionally generalist' (RG) species with reverse attributes....
Effect of system mineral and organic-mineral fertilization on the humus content and humus fractions in mollic fluvisols... The humus type was not infl uenced from the fertilization
To humus type and season... Two morphometric characters (body and tail lengths) cari be used to distinguish populations, thus like the other mononch Prionchulus punctatus, Clarkus papillatus cari be considered as a good indicator of humus type differentiation....
