Between the option of hiring or buying expensive machines or outright burning, there are several others solutions to handle paddy stubble in the fields.
However, these come with their own complications.
Natural decomposers and digging the stubble deep within the soil itself to let it decay are, for instance, suggested as an alternative to costly machines or the cheap option of burning the stubble. Decomposers are spread on the stubble, quickening their natural decay. Once the stubble is decayed, it is manure for the soil.
The problem is time. The window between harvesting of paddy and subsequent sowing of wheat