Plants responding better to salinity and soil having salt removed are two different conclusions. Research on plant responses does not automatically prove that an applied material can desalinate soil.
A pot experiment on tomatoes
Bziouech and colleagues in 2022 studied Firenze tomatoes under greenhouse conditions, using mixtures containing vermicompost or compost and different NaCl levels. The authors monitored growth, pigments and biochemical indicators associated with stress.
According to the abstract, mixtures containing vermicompost produced favorable results for some plant-response indicators under the conditions investigated. This was a pot experiment with defined growing-media composition, rather than a report on treating saline soil in the field.
Do not conflate units or what is measured
NaCl concentrations created in an experiment are not equivalent to every electrical conductivity (EC) measurement of soil or irrigation water. When reading a report, check the sample measured and the method used before comparing numbers.
Taller plants or favorable leaf responses do not establish that salt has been removed from the land. Assessing changes in salinity requires soil or water measurements suited to that question.
Before changing fertilization practices
Growers should obtain information on soil, water sources and drainage conditions; measures should be selected using these data. A small controlled trial helps assess applicability at the production site.
This article provides no desalination application rate and does not confirm the effectiveness of any particular commercial product.
Read more: Water-retentive soil with good structure: assessing vermicompost effects; Improving soil through organic matter management: measure the problem first, monitor afterward.