A popular soil sampling device in (you guessed it) North and South Dakota, our JMC Dakota Probe pulls a really lo-o-ong, continuous sample for a hand operated probe. Best used in agricultural soils, this probe features a window milled into the side of the probe where you can view the entire sample at once. The window makes unloading the sample very easy too - especially with the optional JMC Special Cleaner. and JMC Cleaning Brush
This extension lets you sample 3 feet deeper than the length of your sampling tube. (6 feet with a 3 foot tube) If you want to sample deeper than that you will need to purchase one or more JMC ESP Regular Extensions in addition to this extension.