Geosphere: Soil Salinity

Measure the conductivity of several soil samples to determine the salinity of the soil. In addition, assess each sample and describe the type of crop it might sustain, if any.

Lab Summary:

In this exploration, students will complete the second of a three-experiment series studying soil quality.

In this particular exploration, they will use the Conductivity Sensor to measure the salinity of locally-collected soil samples using a standard procedure to measure electrical conductivity.

Students will demonstrate the disparities in soil salinity by taking samples in diverse locations and predict whether their soil could support common agricultural crops. In addition, students will propose suggestions to correct adverse salinity levels to yield soil that will support productive crops.

Download free labs:

(student versions)

Computer-based lab (PDF, 637 KB)

Xplorer GLX-based lab (PDF, 116 KB)

Method:

Use a Conductivity Sensor to measure the salinity of locally-collected soil samples using a standard procedure to measure electrical conductivity.

Here's What You Need:

Required for computer-based lab:

(See lab download for Xplorer GLX-based lab requirements, which may differ)

Probeware

Other Materials

  • Digging Tool (trowel)
  • Measuring Spoons
  • Wash Bottle and Waste Container
  • Beakers (4), 100-mL
  • Graduated Cylinder, 100-mL
  • Stirring Rod
  • Protective Gear
  • Sealable plastic bags
  • Pen or pencil
  • Permanent marking pen
  • Paper Towels or Kimwipes
  • Soil samples from local area
  • Water, Distilled, 60.0 mL (per sample)

Lab Manual:

The computer-based activity is included in Explorations in Earth and Environmental Science (PS-2809). The Xplorer GLX-based lab is included in Earth and Environmental Science with the Xplorer GLX (PS-2821A). Both manuals are complete with Teacher Information pages, student instructions and handouts, and sample data.

For your convenience, we offer bundles which provide the probeware for the activities in the manual. For more, please see:
Computer-based Earth and Environmental Science Lab Manual and Bundles
Xplorer GLX-based Earth and Environmental Science Lab Manual and Bundles