Detect Compaction with John Deere Soil Probe

1. NOTE: Compaction subsoil layers can be located between 152—203 mm (6—8 in) below surface and may continue to a depth of 305—356 mm (12—14 in). It is critical that your tillage tool be set to approximately 25 mm (1 in) below this level. This layer impedes water infiltration and evaporation, restricts root growth and ultimately causes yield loss.

   NOTE: Dry soils are not always compacted. Adequate moisture needs to be present to allow probe to penetrate soil layers.

   NOTE: Soil penetrometers are another useful tool to help diagnose compaction layers. It is worth noting that this gauge is used to evaluate soil strength. There is no specific numerical soil strength value that identifies compaction as root and yield limiting.

   
   N54964-UN-31AUG00

   Press probe into ground slowly with consistent down-pressure.

---




2. Note depth at which it takes added force to penetrate (typically top of compacted layer).

3. Continue to force probe through this layer and note depth where less force is needed (typically bottom edge).

4. Continue in different areas of field to diagnose compacted areas.

5. Set rippers 25 mm (1 in) below bottom edge of layer.