RE: weed control
Peas are a spring crop, mature early, and do not like heat. They will mature and disappear as the heat of summer comes on strong. If you want to grow peas, plan on a later planting of something like soybeans. Plant round-up ready beans, and weed control is easy. If you have grass in your peas or soybeans, POAST is another herbicide that will kill grass (slowly), but leave broadleaf plants alone. It can be purchased at your local coop, or online.