Reference Room Books
Begin by searching for your commodity in the search box
Some results will be country-specific commodity while others will be regional.
Look for the entries on the agriculture or economy
If you find specific Country Statistics on Agriculture for your commodity, it will look like this
Also look at the Economy section for that country to figure out its context in the country's agricultural sector.
Types of Reports and Studies in Statista
If there is a specific association or alliance of growers or farmers, their website may be helpful. Here are other major bodies that are interested in agriculture: