"Organic split yellow mung beans are currently only produced by American Health and Nutrition (organictrading.com.) They only do wholesale with a 500 pound minimum. The retailers are HarvestTimeNaturalFoods.com 800-628-8736 or 517-628-2506 minimum 35.00 and Everybodys Health Food Store 641-472-5199 no minimum."
American Health and Nutrition (organictrading.com) has become New Organics (http://www.neworganics.com/).
HarvestTimeNaturalFoods.com has become Ferris Organic Farm (http://www.ferrisorganicfarm.com/).
The USA-produced organic split (yellow) dal is grown in China but split in the US. Therefore, it can be labeled as a product of the USA.
To my knowledge there is not a single source of "grown in USA" organic split yellow dal. According to my research, all organic dal I have found comes from China -- even when it is sold at Ayurvedic/Indian sites.
I have an interesting comparison with non-organic yellow dal. The yellow dal from Indian sources has added coloring agents to make it appear more yellow.
In my comparisons, the USA-split organic yellow dal is much better than the China-split product. The USA-split dal has significantly fewer loose husks (which is a very big problem with the China-split product) and it also produces less foam when rinsed. This is currently the best dal I know of. Being split in the USA does make a difference.
But we do need a source of non-Chinese organic dal.