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Concept
Soil morphology
Résumé
Soil morphology is the branch of soil science dedicated to the technical description of soil, 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.
Along with soil formation and soil classification, soil morphology is considered part of pedology, one of the central disciplines of soil science.
Since the origin of agriculture, humans have understood that soils contain different properties which affect their ability to grow crops. However, soil science did not become its own scientific discipline until the 19th century, and even then early soil scientists were broadly grouped as either "agro-chemists" or "agro-geologists" due to the enduring strong ties of soil to agriculture. These agro-geologists examined soils in natural settings and were the first to scientifically study soil morphology.
A team of Russian early soil scientists led by V.V. Dokuchaev observed soil profiles with similar horizons in areas with similar climate and vegetation, despite being hundreds of kilometers apart. Dokuchaev's work, along with later contributions from K.D. Glinka, C.F. Marbut, and Hans Jenny, established soils as independent, natural bodies with unique properties caused by their equally unique combinations of climate, biological activity, relief, parent material, and time. Soil properties had previously been inferred from geological or environmental conditions alone, but with this new understanding, soil morphological properties were now used to evaluate the integrated influence of these factors.
Soil morphology became the basis for understanding observations, experiments, behavior, and practical uses of different soils. To standardize morphological descriptions, official guidelines and handbooks for describing soil were first published in the 1930s by Charles Kellogg and the United States Department of Agriculture-Soil Conservation Service for the United States and by G.R.
Source officielle
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