In this thread we were discussing which soybeans produced nectar.
I have bees parked next to both the white flowered and the blue flowered varieties.
What I have noticed so far is that the blue flowered variety will start out as white but turn blue/purple as they bloom. My bees that are working the bluish colored variety are bringing in good amounts of water white nectar even without much rain and really hot weather.
The bees sitting on a field of pure white blooms are not bringing in anything at all. The honey they do have that is still uncapped is amber in color. Still they are not expanding at all at this time and the bloom has been in full florescence for quite some time with good rain once a week since it has come up.