 Right now, it's 68 degrees. KBRF Fergus Falls Deals. Save on everything from food to jewelry. You'll save on what you buy every day at FergusFallsDeals.com. Is it worth it to use a foliar fertilizer? I'm Darren Hefty. We'll talk about foliar nutrition on today's Ag PhD Radio Update. If you look close enough, you can see the hidden potential within your fields. That's why an agri-liquid nutrition plan starts with the crop.