Question
The soil amendment used for the reclamation of Sodic
soil isSolution
The reclamation of sodic soil is generally done by applying gypsum into the soil followed by leaching.
There are three series given below which are following with the same pattern.
Series I: 21, 44, 135, 544, 2725
Series II: 14, B, C, D, E
90     211     67     236     ?     265
...26 63 124 215 342 511 ?
...23   27    54    ?       195    231
...59, 170, 301, 452, ?, 814
30, 39, 66, ? , 174, 255
2, 12, 36, 80, ?, 252
104   106   110   113   ?   126
17                          26                          37                   �...
13, 14, 18, 27, 43, ?