I think food (or agricultural produce or whatever) should absolutely be a factor in HOI3.
First of all it was a very real factor in WW2. Hitlers reach for the Ukraine was mainly due to its agricultural ability.
Secondly it'd make other countries much more fun to play. Denmark is uninteresting, as they have little IC and few natural resources. However IRL Denmark had a huge agricultural production that was an important factor in the countrys relation with Germany. It could also make an interesting addition to the diplomatic aspects of the game, such as trade agreements based on certain treaties (non-aggression, guranteeing independence, defence-pact (to borrow from Diplomacy) etc.).
First of all it was a very real factor in WW2. Hitlers reach for the Ukraine was mainly due to its agricultural ability.
Secondly it'd make other countries much more fun to play. Denmark is uninteresting, as they have little IC and few natural resources. However IRL Denmark had a huge agricultural production that was an important factor in the countrys relation with Germany. It could also make an interesting addition to the diplomatic aspects of the game, such as trade agreements based on certain treaties (non-aggression, guranteeing independence, defence-pact (to borrow from Diplomacy) etc.).