If you liked the Gin no Saji manga, the Anime-Planet community thinks you'd like:
Before she became a mangaka, Hiromu Arakawa worked on her family's farm, and now she's ready to educate the world. From explaining what a typical day on a dairy and produce farm is like, to describing how harvesting machines work and even telling why milk is good for you, Arakawa is here to spread her love of farming to the nation.
Gin no Saji and Ja Ja Uma Grooming UP! share quite a few themes together. For starters both take place in Hokkaido, second both revolve around farming, third male leads come from a big city and are unaccustomed to the countryside (much less farming), not to mention that both of those guys are having some trouble with their parents (and meeting their expectations). And all that is just a tip of the iceberg. So, if you liked one, you should go read the other one right ASAP.
Sawaki Tadayasu and his long time friend from the village, Yuuki Kei, are finally away from home and ready to start university. They attend Tokyo's College of Agriculture, and the adventures start from day one! But that is to be expected, as Sawaki has a special ability that is inducive to adventure and glory, especially in the world of agriculture and biology: Sawaki can see, communicate, and interact with microbes! With ambitious sake-brewing upperclassmen, a sadistic postgraduate, and a clean-freak colleague, things can only become more exciting for the duo!
Both Moyashimon and Gin no Saji are manga set in a specialist agricultural school. While Moyashimon focuses more on microbes and Gin no Saji on animal care, if you enjoy comic manga about farming then you'll like both of these.