The INPhO network of the Food and Agricultural Organisation is one of the more comprehensive sources of processing information for small enterprises.
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The information is comprehensive and has a commodity as well as an equipment focus. The equipment and individual databases of the past seem to have been removed, but compendiums and toolkits seem to supply useful information. These however seem to require a bit of digging to find. There is also some business information although this seems to only include the Agriventure programme developed some years ago.
I must admit to being a bit out of touch with this information, so would ask anyone who has recommendations on how to optimize its value, to leave them in the comments.