However, the presence of different ectomycorrhizal groups in different soil horizons suggest that different groups have evolved specialized niche separation, possibly attributable to exploration type.
32.
The "'soil great group "'category is a subdivision of a suborder in which the kind and sequence of soil horizons distinguish one soil from another.
33.
Exploration type also fails to take into account other aspects of hyphal morphology, such as the extent to which hyphae cross into deeper soil horizons.
34.
Illuvial deposits of clays, oxides, and organics accumulate in subsoil as distinctive soil horizons classified as " B horizons " or " zones of illuviation ".
35.
It also identified well developed soil horizons beneath the peat on the northern side of the Lindholme ridge, but evidence of soil faunal activity for limited.
36.
A horizontal layer of the soil, whose physical features, composition and age are distinct from those above and beneath, are referred to as a soil horizon.
37.
Soil scientists use the capital letters O, A, B, C, and E to identify the master soil horizons, and lowercase letters for distinctions of these horizons.
38.
Radiocarbon dates on charcoal from the dump and the remains of vegetation from the soil horizon show that construction began 5, 400 to 5, 300 years ago.
39.
Soil scientists often dig a large hole, called a soil pit ( sometimes several meters deep and about a meter wide ) to expose soil horizons for study.
40.
Developing the ideas of Vasily Dokuchaev, Sergey Kravkov appealed to permanent systematic studies of soil horizons, qualifying the dynamics of soil processes as the life of soil .
