Yoshon and Chodosh refer to the time of year that wheat is planted and takes root. In the latest episode of Kosher Corner
, Rabbi Chaim Fogelman
explains the agricultural background of grains as related to Yoshon, as well as the rabbinic arguments.
This well done video presents the topic in a clear way, and leaves the final descision of whether or not to keep yoshen up to your own rabbinic advisor.