No you can not. In order to test soil ph you will have to spend some bucks on a quality meter. What growers do is just buy a digital ph pen and test run-off water.
Here's a great pen from a great company. This pen along with some 7.0 calibration solution and storage solution and you are good to go.
Hanna pHep+ pH Tester - Mfg# HI 98108
growbe Reviewed by growbe on . What about this pH pen/meter ? Here is one pH pen I would like to buy to be ready for this summer to grow in soil (will be my first grow). Can you please tell me if this is any good for me or if I have to look for something else ? Here is the link: Pen Style PH Meter for Swimming Pools Spas Tester New Thank you ! Rating: 5