For more information and details on postharvest handling of fruits and vegetables, USDA specifications, postharvest diseases, and postharvest storing technology, the resources below are very helpful.
Blue Book Services: Know Your Commodity
UC Davis Postharvest Technology mobile app Produce Facts and website.
USDA Agricultural Marketing Service, US Grade Standards.
Wholesale and Retail Product Specifications: Guidance and Best Practices for Fresh Produce. 2014.