-Excess salt (saline soil)
-Excess sodium (sodic soil)
-High acidity (acid soil)
-Poor drainage (hydromorphic soil)
-Shallowness
-Presence of toxic elements
Reclamation of problem soils involves techniques that improve their physical, chemical, and biological properties to make them suitable for agricultural use. Some common reclamation methods include:
1. Saline soil reclamation: This involves leaching out excess salts from the soil by applying large quantities of water. The water dissolves the salts and carries them away from the root zone.
2. Sodic soil reclamation: This involves adding amendments such as gypsum to the soil to replace sodium with calcium ions, which improves soil structure and reduces alkalinity.
3. Acid soil reclamation: This involves adding amendments such as lime or wood ash to the soil to increase its pH.
4. Hydromorphic soil reclamation: This involves improving drainage by installing drainage tiles, ditches, or other methods to remove excess water from the soil.
5. Shallow soil reclamation: This involves adding soil to increase the depth of the soil profile, or using special techniques such as terracing to improve soil moisture retention.
6. Toxic elements removal: This involves techniques to remove or reduce the concentration of toxic elements in the soil, such as bioremediation or phytoremediation.
Reclamation of problem soils is important to increase the amount of land available for agricultural use, improve crop yields, and reduce environmental impacts.
