Potato growers in Punjab are facing a double whammy with low prices for their crop and decreased yield. While potatoes are fetching about Rs 350-400 per quintal, onions are fetching even less than Rs 300 per quintal. The farmers are even failing to realise the input cost. Potato growers in Punjab are facing a double whammy with low prices for their crop and decreased yield. While potatoes are fetching about Rs 350-400 per quintal, onions are fetching even less than Rs 300 per quintal. The farmers are even failing to realise the input cost.