Ignition loss as an analytical characteristic of soil
1998
Kask, R. | Niine, H.
In soils poor of organic matter differences of ignition loss are caused mainly by changes taking place during heating the mineral part of the soil. In non-carbonated soils ignition loss (0.2...4.0 per cent) is closely connected with the percentage of clay in their fine earth content (0.01). In carbonated soils of low organic matter content ignition loss is mainly due to CO2 that evaporates when carbonates disintegrate. CO2 may form up to 40 per cent of the total soil mass. Ignition loss in non-carbonated soils of high organic matter content is mainly related to the organic matter content in soil mass, expressed as C sub(org) or as humus. The ratio 1.72 C sub(org): ignition loss indicates that the larger the proportion of organic matter in the soil the more the coefficient 1.72 underestimates the actual matter content. In non-carbonated sand, peaty and peaty-bog soils ignition loss is a better indicator of the organic matter content than C sub(org) or humus
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