THE MICRO-ORGANISMS IN PROFILES OF CERTAIN VIRGIN SOILS IN MANITOBA

Publisher Website
Google Scholar
Abstract
Twelve profiles of five different kinds of virgin soils of Manitoba were sampled, described and critically examined for soil organisms, hydrogen ion concentration and the moisture and organic matter present. Usually the A horizon showed the highest count of each group of micro-organisms and the C horizon the lowest although the greatest number of bacteria were present in the B horizon of boil 1 in the month of May. The proportion of anaerobic bacteria and fungi to total numbers increased with the depth of the horizon. Moisture content of the soil was not found to exert any consistent effect upon the numbers of micro-organisms present. Fungi were most abundant in the wooded and peat soils, bacteria more so in soils of the meadow-prairie phase. In the wooded soils the microbiological horizons appeared to coincide with the morphological horizons.

This publication has 0 references indexed in Scilit: