To fly the cropduster use the following keys:
Turn left: [Left]
Turn right: [Right]
Descend in altitude: [Page Down]
Increase altitude: [Page Up]
Land when above airport: [End]
Shortly after your strawberries turn from green to light red, flood the field. You will notice a great difference in the price value when harvested. You can also do this a month before you have to harvest the field.
Place a barn enclosed by a fence then put four bales of hay and two water troughs in front of the door so that the animals cannot get out. They will stay in the best health and will not use any food. Make sure to leave empty stalls for offspring. The position of the food and water is as follows (W indicates Water, F indicates Food, and B indicates Barn):
Instead of putting up fences for horses, cows, pigs, and/or sheep, just make ditches around their pen area. By doing this, they will not break the fences when they get too fat. None of those types of animals will cross a ditch.
If you plant oranges, you can earn up to $28,000. The crop will need to be changed however, because it takes nutrients out of the soil. Switch it with sugar beets and strawberries.
Harvest a crop, then start a drought from the "Disasters" menu. Wait until the price of your crop increases before selling.