Finally, farmers are learning/rediscovering that companion planting is the way forward. This time it's soy and rye in the USA:
This study is benefiting from the experience and knowledge of Robin Brekken, a farmer from Crookston, Minnesota, who began transitioning to organic in 1998. Although this is only the first year of the study, it is Brekken’s fourth year of planting soybeans into rye.
How much knowledge and how many varieties have been lost since farming went industrial?