![]() ![]() The results can be verified by an almost harmless excavation of whole root systems, including fine roots, using the ultrasonic air‐stream (air‐spade) method. The differential electric conductance method has been used for fast measurement of conducting (absorbing) root surfaces. Fine roots cannot be visualized by this method, but the total rooted volume of soil can be determined. This can even be done under layers of undisturbed materials such as concrete, asphalt and water. The ground‐penetrating radar technique provides 3D images of coarse roots (starting with a diameter of about 20 mm) from the soil surface down to a depth of several metres. ![]() New methods using different physical principles have been successfully applied in studies of root systems of large trees. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |