As raw cane leftovers doesn't decay or decompose very fast [reasons why they don't sow it back into the ground], it might be wise for this particular ministry, and the farmers, to set up waste collection stations where such post-harvest materials can be turned into a mulchy mix and eventually distributed as an additive to all farmers in the area.
Wouldn't be terribly costly - across the board - as everyone [farmers, govt, whomever] pitches in to contribute to the benefit of the local commons.