I've used buckwheat as a garden cover crop (generic black hulled variety),
and was very impressed with what it did for soil tilth. The fine roots work
very well on clay/silty soil, breaking the clumpiness up quite a bit. After
tilling it in I found the soil much more loose and crumbly than before. I
also found it did darken the honey in the backyard hive a bit, but I liked
it.
Todd.
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