This link: provides an estimated schedule of when the USDA hopes to publish their competitive grant guidelines. I've looked into a few that have a publication date of January and so far those are not published. One example is the AFRA Foundational grants. This is a site work bookmarking and periodically checking if you are looking for an updated solicitation. On the left vertical bar, there is also a link to the overall RFA list which has links to all the competitive programs, albeit some are outdated. At least we can know what is open or not.