GK
SOIL AND AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Manganese oxide
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Silica
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Iron
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All of these
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Detailed explanation-1: -White color of soil is due to the presence of Manganese Oxide. Manganese Oxide is an inorganic compound that is used as a colourant. It is formed by weathering of Manganese rich carbonates and silicates. It is also used as fertilizers and food additives.
Detailed explanation-2: -Soil color is produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content.
Detailed explanation-3: -Laterite is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content.