Push-A-Button Farms

A middle game easy farm.

Get the block your farm is gotta be made out of. Next get a button, 2 pieces of redstone, one sticky piston and one repeater

This is how it will work.

Get some more redstone 11 repeaters (10 depending many sticky pistons) and the blocks of your choice.

For the collecting system get two buckets of water (to make it be an item transport system), two hoppers, and two chest.

Place the chest in the middle of the farm with the two hoppers facing it so they get sent into the chest.

This farm is a 10 * 6 farm so it can grow 60 items at a time if you work a little bit maybe you can make it larger I haven't tried it. Also you have to plant the crops manually.