(dramatic music) d: hello and welcome to ag phd , i'm darren hefty. b: and i'm brian hefty. thanks for joining us today. one of the biggest soil issues that a lot of farmers face around the country is high magnesium levels. well, how can you manage that field so you get the best yield this term-how can you reduce that magnesium so you get better profitability going forward? d: you know every year we're answering questions about test weight in various crops. how come one field had good test weight, the other field didn't, and i had the same variety or the same hybrid? we're going to talk about what you can control on your farm to improve test weight. b: well, speaking of control, you're going to want to get our weed of the week under control. we've got an iron talk coming up later in the show as well, but first, here's this week's farm basics. b: during our farm basics time today, we want to talk about something that farmers have to work with: that is cold