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A very good option is the production of biochar from the husks. With this method you can make a second product from your waste husks. The product is a type of supersoil that you can either use on your trees or sell. This is a small scale biochar machine you can make with old oil drums.
https://www.youtube.com/watch?v=5TxOVyHS68U
When this is made you make the biochar from the husks and then the powdered carbon you can enrich with EM1 and EM2 microbacteria. This when added to normal dirt and compost if you have it available will make supersoils.
https://www.youtube.com/watch?v=P7m1ayNdS78