I think moong dal is good for monsoon season and as a green manure.
But I don’t know how it can take water logged soils.
In this article he mentions which green manure crops can take water logging and extremely heavy rains.
researchgate.net/publication … tural_soil
Here are other cover crops that can help remediate soil.
Fenugreek, sesame, and ginger can help loosen soil.
Chickpeas and black eyed peas can help add organic matter.
My ancestors I think used peanut shells for organic matter. I would ask others to confirm that.
But I think
RED Karamani or Red cowpea is best for soil remediation.
i1193.photobucket.com/albums/aa3 … G_0739.jpg
groworganic.com/media/pdfs/Cover … eb2013.pdf
There are many links online. In YouTube or Google “green manure India” or “green manuring India”
agritech.tnau.ac.in/agriculture/ … intro.html
hindu.com/seta/2004/02/05/st … 421700.htm
youtube.com/watch?app=deskto … x3POzc4j9g
youtube.com/watch?v=vvHLPzb2 … pp=desktop