Question

Red soil is acidic in nature. Give reason.

Answer 1

• They are acidic mainly due to the nature of the parent rocks. The alkali content is fair.
• They are poor in lime, magnesia, phosphates, nitrogen and humus.
• They are fairly rich in potash and potassium.
• Color of Red Soils
• The red colour is due to the presence of iron oxide.
• When limestone, granites, gneisses and quartzites are eroded the clay enclosed within the rocks remains intact with other forms of non-soluble materials.
• In oxidizing conditions, rust or iron oxide develops in the clay, when the soil is present above the water table giving the soil a characteristic red colour.
• The colour is more due to the wide diffusion rather than high percentage of iron oxide content.

Answer 2

your question:Why are red soils acidic in nature?
answer: They are acidic mainly due to the nature of the parent rocks. The alkali content is fair.They are poor in lime, magnesia, phosphates,nitrogen and humus.