~Nutrient depletion is predicted by the experts to cause serious problems in poor soil quality areas of northeastern India (International Food Policy Research Institute)
Nitrogen Fixing Plants–
One way to help depleted soil is to plant nitrogen fixing legume plants. These plants attract bacteria that invade the root and form nodules, and these nodules help the soil regain nitrogen. These plants can also be used to help the soil by being cut down once they have reached maturity and laid on top of the soil. The plants become a mulch that provide carbon, nitrogen, and other nutrients to the soil.
(source- Greg from One Cool Earth)
Introducing cardboard to improve soil performance–
Cardboard can be placed under the top layer of soil to help fix the depleted soil. Cardboard does this in a few ways. First, it is a source of carbon. Cardboard also holds water and attracts helpful earthworms and bacteria. Last, the cardboard creates a barrier against harmful weeds.
(Source- Greg from One Cool Earth)