Why would an archaeologist strive to limit the use of probes such as augers and test pits at a potential site?

Discussion questions : Archaeologists use many methods to locate sites. Why would an archaeologist strive to limit the use of probes such as augers and test pits at a potential site? Describe how new technologies such as drones, GPS, and Google Earth are changing how archaeologists locate sites. Is one technology better than the others? Why or why not?
please follow rubric, just chapter of book for source. I already Attached the book in the file.