Gamma radiation applied to forest renereration

The present paper demonstrates that till soils in Lapland vary in hydraulic properties. Hydraulic site requirements are different between Scots pine (Pinus silvestris L.) and Norway spruce (Picea abies Karst) and tree species distribution follows the mosaic pattem of tills. It was found that Scots pine tend to be adapted on dry tills, while Norway spruce is more tolerant of large range of soil water content. The in situ dielectric determinaton of soil moisture, coupled with terrestial gamma radiation measurements, are reliable ground truth reference for the classification and interpretation of airborne radiometric data. The airborne gamma-ray data will provide to soil moisture mapping and, thus, help tree species selection when artificial regeneretion is applied.