After the turnip pods have fully dried harvesting them is a breeze! Next step: separate the seeds from the chaff and plant for a fall harvest.
My original stock of seeds came from the Innisfil Seed Library:
http://innisfilseedlibrary.ca/
Their Youtube channel:
https://www.youtube.com/channel/UCWZrp7e0ap_zfUxKwM6G7jg