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Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.
Soil biology, physics and chemistry: occurrence of physicochemical parameters and surface properties on biological processes and population behavior Population biology and molecular ecology : methodological development and contribution to study microbial and faunal populations; diversity and population dynamics ; genetic transfers, influence of ...
The biological component of soil is an extremely important carbon sink since about 57% of the biotic content is carbon. Even in deserts, cyanobacteria, lichens and mosses form biological soil crusts which capture and sequester a significant amount of carbon by photosynthesis. Poor farming and grazing methods have degraded soils and released ...
Download as PDF; Printable version; ... Soil microbiology is the study of microorganisms in soil, their functions, and how they affect soil properties. [1]
A soil scientist examining horizons within a soil profile. Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.
For example, biological soil crusts are more dominated by green algae on more acidic and less salty soils, whereas cyanobacteria are more favored on alkaline and haline soils. Within a climate zone , the abundance of lichens and mosses in biological soil crusts generally increases with increasing clay and silt content and decreasing sand.
Soil morphology is the branch of soil science dedicated to the technical description of soil, [1] particularly physical properties including texture, color, structure, and consistence. Morphological evaluations of soil are typically performed in the field on a soil profile containing multiple horizons .
Biological systems—both natural and artificial—depend heavily on healthy soils; it is the maintenance of soil health and fertility in all of its dimensions that sustain life. The interconnection spans vast spatial and temporal scales; the major degradation issues of salinity and soil erosion, for instance, can have anywhere from local to ...