Soil Color
Soil Color - Consortium of Institutes for Decentralized Wastewater ...
Soil Color - Consortium of Institutes for Decentralized Wastewater ...
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<strong>Color</strong>ing agents in the soil<br />
‣ Organic matter darkens the soil. Organic matter will<br />
mask all other coloring agents.<br />
‣ Iron (Fe) is the primary coloring agent in the subsoil.<br />
The orange brown colors associated with well drained<br />
soils are the result of Fe oxide stains coating individual<br />
particles.<br />
‣ Manganese (Mn) is common in some soils resulting in<br />
a very dark black or purplish black color.