In Farmville, there is a fairly old cheat you can use that will allow you to plow, plant, and harvest much faster than normal.
All you have to do is block your character on four sides with small objects. Most people use hay bales, but it can be pretty much any small object that you have access to, like barrels, boxes, etc.
Walk or move your character to an empty square, and then put a small object on all four sides of them until they can’t move. Now when you plow, plant, or harvest, your character doesn’t need to move in order for the action to complete, making all of these actions a lot faster than normal.
Here is an example, showing a plant being harvested with this technique. You still get everything you would normally get, it just goes faster.