One product that can increase your revenues is the corn drier.
maize may be dried and then sold for more than ordinary maize. Turn on the dryer to begin the drying process after placing it on your field and delivering fuel and grain.
Price: 75,000 $; Daily maintenance: $65; Capacity: 10,000 wet maize; Dryer; Capacity: 40,000 dry maize; Capacity: 500 fuel;Hourly production costs: $150
Manufacturing:
-Usage each cycle (4 hours of labor): 10000 l of wet maize, 100 l of diesel, and 8700 l of dry corn (volume loss: 1300 l, or around 13%)
-Cycles per hour: 0.25 (1 cycle every 4 hours)

Thanks to Barney