If your lab isn't in the drop down menu when you're creating your soil collection jobs, you can still utilise the Agworld soil sampling app. When creating the job, choose the "My lab is not available option". You can then go and collect the samples, and Agworld will email you the csv file to forward on to your lab. They can then fill in the file with the sample analytes, send it back to you, and you can upload it into Agworld.
If you have any issues, pleas contact your local Agworld support team.