Seeds from Turnip Plant

Here's a shot of a turnip seed plant gone to seed ( we let it do that on purpose).We are hoping that we can grow some turnips from the seeds....just have to figure out the best way to same them...I say we should hang them up by the root and let them dry..Cecil says put them in a bag to let them dry...so I think , if I cover the seeds on the limb and hang it up like that..they are bound to dry and the seeds would fall into the bag instead of the ground! Two head thoughts better than one.