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The salinization and sodification of agricultural lands in arid and semi-arid regions of the world are two limiting factors in crop production. In India, an area of about 6.72 million ha is salt-affected, of which 3.77 million ha is sodic soil. To evaluate the reclamation potential of soil amendment, a laboratory incubation study was conducted at the Agricultural College and Research Institute, Tiruchirappalli (2022). Different soil amendments, viz.<i>,</i> T₁-Pongamia GLM @ 6.25 t ha⁻¹, T₂-Pressmud @ 10 t ha⁻¹, T₃-CSR GROMOR 25 kg ha⁻¹, T₄-Marine gypsum 50% GR, T₅-Marine gypsum @ 50% GR + Pongamia GLM 6.25 t ha⁻¹, T₆-Marine gypsum 50% GR + Pressmud 10 t ha⁻¹, T₇-Marine gypsum 50% GR + CSR GROMOR 25 kg ha⁻¹ and T₈-Control (no amendments), were used for incubation. After 90 days of incubation, a pot culture using post-incubated soil was raised to study the seedling parameters of green gram, which was laid out in a randomized block design with three replications. The analysis of post-incubated soil using ICP-MS shows higher levels of cations, viz., Ca (+67%), Mg (+65%) and K (+66%), were found in marine gypsum @ 50% GR + CSR GROMOR @ 25 kg ha⁻¹ with lower values of pH (−15%), EC (−63%), ESP (−39%) and Na (−58%) compared to the control. The same treatment recorded higher chlorophyll, relative water content and seedling vigor index I and II in green gram. The results indicated that marine gypsum + CSR GROMOR had a positive impact on reducing soil sodicity and improving soil fertility.