Which of the following is method for the reclamation of alkali soil?

The correct answer is ​All the above.

• Reclamation of alkali soil: It can be defined as the removal of exchangeable sodium and its replacement by calcium.
• Gypsum: 8q/ ha used for reclamation of alkali soils having pH > 8.5
• Iron pyrite: (Fes₂): 12q/ ha can be used for amendments of alkali soil.
• Green manuring should be adopted for the reclamation of alkali soil.
• Cultivation of Salt tolerant crops is good for the reclamation of alkali soil.
• Additional Information
• Alkaline soils: In alkaline soil Bo, Mo, and Sodium toxicity.
• Black colored, found in the semi-arid and sub-humid areas.
•  Alkaline soils developed due to excess NaCO₃ and NaHCO₃ ions in the soil.
• In alkaline soils, we should use CAN or DAP instead of urea.