is sand the same as soil why can slopes be different for soil probe can you measure soil moisture on a r calibration curve how to tell when calibration test slope is different how many different slopes of soil what is the slope of soil moisture probe how much different soil samples for a soil moisture probe how many different slopes are there for soil moisture? can a soil moisture probe be used for a slope test why is slope different in xy soil calibration are slopes of a calibration experiment different what is the slope of the soil moisture probe? how many different probes in soil how many different slopes on the calibrated model? what is the slope of soil moisture test do soil probes have different slope what is soil moisture content measured by do soil probes have different slope what is slope of soil moisture probe can I test how much moisture is in my soil