I have a powerful Hacienda Sugar Cane Farm boosted with tractors and fertilizer. The production statistics screen shows it can provide the island's needs and generate a surplus. It fails to reach full productivity because its 'outbox' fills to 4/4 quickly and is not unloaded fast enough by the wagons. The wagons choose to take a long road to some breweries that require a little bit of sugar cane at a time instead of transporting loads of sugar cane to a nearby warehouse. Since the farm outputs much less than its potential due to the slow offloading of sugar cane, buildings other than the brewery begin to operate intermittently such as the sugar refinery and a chemical plant relying on refined sugar.
I would like the breweries to access their own warehouse to get the sugar cane that is in island storage.
I would like the sugar cane to be transported directly to the warehouse, or at least have one cart doing that instead of all of them going to the breweries.
I have a save game I can share of the problem.