How to create humus fast in shallow waters?

Question

I have to create humus very fast in a vast area of land in tropical INDIA with 1000s of mud hillocks and very highly eroded badlands. I plan to plug water gullies to trap rain water, thus getting shortlived shallow water bodies and grow 'THICK' algae/plankton/reed. Can u suggest strains of these or other plants i can grow here at low cost- for creating humus and making the lands fertile? This is a community project.

Answer 1

Add some Earthworms and plant some fast soil forming plants like Erythrina,Butea and Jatropha.