What are the problematic soil how can you classify?
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The soils with pH less than 6.5 and which respond to liming may be considered as acidic soils.
(a) Reasons for Acidity:
(i) Humus decomposition results in release of large amounts of acids. There by lowering the pH.
(ii) Rainfall: In areas with more than 100 cm rainfall associated with high R.H., Ca, Mg is dissolved in water and leached out due to this base saturation of soil decreases.
(b) Characteristics:
(i) pH is less than 6.5
(ii) These soils are open textured with high massive Structure.
(c) Injury to Crops:
(i) Direct Affects:
(1) Plant root system does not grow normally due to toxic hydrogen ions.
(ii) Indirect Affects:
(1) Deficiency of Ca and Mg occur by leaching.
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