It is preferable to make several medium-sized fields rather than broad fields that will take too long to develop and reach the level needed for crops to be recovered by farmers.
Also, it is necessary to separate the fields one from the others with one case, in order to set up stone roads between them, to speed up the transit of the workers. But also an infestation does not spread to the surrounding fields.
Diversify the type of crop, whether they are filled of plants or fruit trees. This is the best way to ensure that the food stock does not collapse at some point. As the commodities perish.
To do this, you will have to buy various seeds at the trading post, when a new merchant arrives.
The same logic for pasture and livestock.