Red soil

Red soils contain large amounts of clay and are generally derived from the weathering of ancient crystalline and metamorphic rock.

[1] Red soils are generally derived from the weathering of crystalline and metamorphic rock in areas of high rainfall.

[1] Fluctuations in the concentration of iron within red soil are found to have significant implications on its fertility and growth properties.

Some strategies employed to practice this include the use of organic manure and establishing proper tillage systems for the land.

[1] The rotation of crops grown in red soil can significantly help to limit some of the compositional issues mentioned previously.

[1] Red soil resources are estimated to cover 102 million hectare (1,020,000 square kilometers) of land in tropical and subtropical regions of China.

The residual red soils in Greece tend to be less than a meter in depth and form on sloping hillsides.

The red soils that form in deep sediments are widespread in the lowlands of Greece, occurring on gently sloping terrain.

In contrast, on the lower plains and valleys, they are rich, deep, dark-colored fertile loam which, under irrigation, can produce excellent crops like cotton, wheat, pulses, tobacco, jowar, linseed, millet, potatoes and fruits.