The soil temperature sensor should be buried in soil. How deep it should be buried is depending from
the goal which should be reached with the sensor. To have an impression of root growth and nitrogen
mineralization in vines or apples in early spring it is best to be burried at 10 to 20 cm deep. If you want to assess
the emergence possibilities of seeds it depends on the seeding depth of the seed. Using it in corn
(maize) would mean to bury it by 5cm and using it for sugar beets would mean to bury it by 2 or 3 cm