Agri Universe does not run any courses at the present moment. But you can check a blog entry titled "Onion Production: requirements, growing, diseases, harvesting and marketing". http://www.agriuniverse.co.zw/blog/entry/onion-production-requirements-growing-diseases-harvesting-and-marketing.html

You can also look at the other blog articles on http://www.agriuniverse.co.zw/blog.html and other articles on http://www.agriuniverse.co.zw/technical.html