When you are entering a new season, you can remove field observations from the last one in the Farm Dog mobile application or web dashboard. To do so:
1) Go to the web dashboard and tap on the field whose observations you want to remove;
2) Tap Edit Field
3) Tap on the planting name
4) Tap "End Planting"
You can then add a new planting for the field.
NOTE: no data is lost when you end a planting. You can always access historical data via Farm Dog.