Presumably agriculture books? Or you could just read them. Growing food is one of the most well-studied and documented areas in the human experience, for obvious reasons.
https://www.nal.usda.gov/
https://www.usda.gov/peoples-garden/gardening-advice
Where did you get the idea that a language model would help you grow food in the first place? This question needs elaboration...
Presumably agriculture books? Or you could just read them. Growing food is one of the most well-studied and documented areas in the human experience, for obvious reasons.