How many grain production ?

[MUPS]

I'm interested from some experienced player that can answer the question of how much field, farms and crops production to build to run an exemple of a 20000 citizens republic, in a self-sufficient manner, and without importing crops (with one building of each "crops-feeded" industries running like chemicals, fabric, food, livestock, alcool).
In my play i have the feeling that i have to cover the entire map with farms to cover my needs for crops. And i have set a 60% fertility for farms and import a lot fertilizer.

[Silent_Shadow]

I'll refer you to here for how many fields are needed.
How much farm equipment you'll need will vary, but I'd say that every 1000 tons you plan for will need a medium farm building at least.

[Sirius Czech]

One small/medium/big field can produce 33/100/300 t of crops with 100% fertility, fertility can be driven up by solid fertiliser/leftover previous season crops up to 150% with additional 50% available by liquid fertiliser spraying.

Rest is math. And you want to make more then you need to earn money for exports.

Btw one food factory can supply around 30-40k pop, alcohol even more (not needed anymore), rest. (chemicals, clothing, ...) are going even higher then that afaik and you will make these a lot for exporting anyway :)

[Joy Giver]

my current map with around 75k pops, need ~40k crops with 1 food factory, 1 alcohol, 1 farm, and 2 big chemical plant run at 100% capacity
But it still lack of food, i guess it need araound 50k to 60k crops to build 1 more food factory

[bajecznie nawdychany]

Some details here as well
https://steamcommunity.com/app/784150/discussions/0/4695658570140673449/#c4633734370401777407

[High King Lemur]

A simple way to estimate resource consumption, if you have an existing republic, is to look at the economy sheet - just look up people's domestic consumption of food during a year when your population was stable and take it from there. Doesn't matter if it's domestic production or imports.

Recently I built a new farmland with 3 medium farms, each with 10 large fields, 5 tractors, 5 harvesters and 12 trucks (2 in farm and 10 in DO), fertilizer import storages and a 5600 t of crop storage. Total production of 18000 t of crops per year, this should be able to sustain a 50 t/day consumption. With smart field layout and assignment it seems to work just fine.