Video: water droplet penetration test

Updated July 15, 2026

We have a short video demonstrating and explaining the water droplet penetration test.

This test is easy and gives a rapid result. If the water droplet disperses and penetrates into an air-dried soil core in five seconds or less, the soil does not have a water repellency problem.

When the droplet takes more than five seconds and up to one minute to penetrate, that zone of the soil profile is classified as having low water repellency. From one minute to…