Crop Fuel® on potatoes is sprayed 6-8 times at 2.5L/ha during the growing season. The average yield increase observed at several research sites between 2006 and 2012 was 7.8% (+5.2 ton/ha). Experiments done on starch varieties showed a starch increase from 521 grams to 525 grams. The varieties Aveka and Festien showed a clear yield increase.