Soil Testing from different locations

Q: I am getting my lawn soil tested. My front yard looks good but my back yard has been a challenge. Should I do a soil test for the back and a second one for the front?

A: If the soil looks pretty much the same in the front as it does in the back you can just submit one sample, with soil collected from both places. But if the backyard is really sandy and the front yard is mostly clay, you need separate samples. Details here