Province Wealth & Town Growth
The wealth of a province is the sum of the base income generated by the castle town or settlement, farms, ports and province speciality buildings, minus tax (the sum of which is the overall income). This is displayed in the lower left section of the province details panel. The lower right section shows the factors affecting the castle town or settlement's (in Fall of the Samurai) additional economic growth over the following turn and indeed every turn to come. A building that generates a level of growth will pay gradually improving dividends over the turns to come, whereas one that has high wealth will give a good initial return, but one that will remain static in the future.