You can find journals by searching for a keywords like nutrition*, food, agricult*, diet*, etc.
To find articles with certain keywords in their titles or abstracts, search Ovid Medline, PubMed@Tufts or other databases.
Some of our journals are also available through Browzine, a website and app that allows you to shelve and read journals in a user-friendly manner. Note that Browzine is designed to provide an experience similar to that of reading a journal you subscribe to and browse monthly. It is not designed for searching for articles on specific topics. For that, use a database.