Soil Solution Access Tubes are typically used to extract soil water samples from varying depths in the root
zone of crops. When used in conjunction with tissue analysis for calibration, management practices can be
developed which allow the grower to adjust the rate and timing of fertilizer applications. The user benefits from
increased production and higher quality, while minimizing fertilizer expense and mitigating the leaching of nutrients.
SSATs are frequently used for measuring nitrate levels, salinity, EC or other chemical elements commonly
associated with soil water management in irrigation (fertigation) regimens. They allow the user to take full
advantage of residual and mineralized nitrogen by delaying or minimizing fertilizer applications. Monitoring below
the root zone can verify the presence or absence of nitrate leaching. Tubes longer than the necessary
sampling depth are routinely used to allow for sufficient vacuum capacity and/or larger sample size. For example, using an
18 in. SSAT for sampling at a 6 in. depth allows the tube to remain under a sufficient vacuum for a longer period of time. We
recommend using the #1002- SSAT Hand Vacuum Pump on tubes longer than 12 in. (30 cm) to apply proper vacuum. SSAT
tubes longer than 3 ft. (90 cm) benefit from offers multiple methods of extracting soil water samples.
The extracted soil water samples are commonly tested with electronic meters or portable test kits.
This useful in-field sampling technique is quick and easy to perform, which makes it well suited to the frequent fertigation
schedules common with certain growing conditions.