ECHO had two rice beds -- one dry land, the other a more typical flooded paddy. The docent told me that the dry land technique produced superior yields -- something like twenty-three pounds in a twenty-five by twenty-five area. The flooded paddy had about half the yield, but was much less labor intensive. (Rice is grown in water primarily to reduce weeds.)
ECHO had some hardware on display, too.
I love simple, commonsense inventions like this one. They never grow old. No moving parts. Essentially a chimney that burns rice hulls.
Brings water to a boil more rapidly than liquid gas.
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