Each item is individually handcrafted by skilled craftsmen, who have been using the same techniques of production for centuries. Duckweed provides food for wildlife, especially waterfowl. Lots of good information on duckweed here. Some species not only thrive on manure-rich water, but can be fed back to livestock, thus completing the recycling process. The practise of using scavenging ducks to control insects and weeds in the rice fields contributes to decreased investment and brings more benefits for the farmers.
Duckweed grown in the integrated farming system is also a high-quality feed for fish.