How do you measure Water Potential?

In this video we briefly go over the the tool used to measure water potential. It is called a "pressure bomb". It measures the approximate water potential of plant tissues. Rubisco Research and Consulting use water potential data from different cannabis genetics to determine the exact water conditions for the roots and the canopy (humidity and vapor pressure deficit) atmospheric environment to achieve maximum yields, highest concentrations of secondary metabolites, and full genetic potential. A leaf and petiole or stem segment is placed inside a sealed chamber. Pressurized gas (normally compressed nitrogen) is slowly added to the chamber. As the pressure increases at some point the liquid contents of the sample will be forced out of the xylem and will be visible at the cut end of the stem or petiole.