Here's how you plant seeds:
1. Tap an empty field. A panel with the available plants will appear at the bottom of the screen.
2. Choose a seed type and drag it to the selected field.
3. Without releasing your finger, move it over other fields to plant them with the same type of seed.
To harvest crops once they are ready:
1. Tap a field that is ready to be harvested and drag the scythe to it from the panel that appears below.
2. Without releasing your finger, drag the scythe over any other fields you want to harvest.
3. You can also collect harvests by double-tapping ripe fields.