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:
"ISHS aims to promote research in all branches of horticulture. It encourages the development of international co-operation, bringing together scientific and technical professionals to stimulate, facilitate and co-ordinate research and scientific activities on a global scale."
"International Labor Rights Forum is a human rights organization that advances dignity and justice for workers in the global economy." Helpful for pineapple, cocoa, bananas, and cashews.
"UTZ is committed to creating a better, more sustainable world. We are now the largest program for coffee and cocoa and have certification schemes in other commodities including (herbal) tea, rooibos and hazelnuts."