DEPOSITION OF MAIN IONS ON OPEN LAND AND IN CROWN THROUGHFALL OF SPRUCE AND PINE STANDS; pp. 1–7

VITALITY OF NORWAY SPRUCE AND SCOTCH PINE ASSESSED BY THE CROWN CLASS AND RADIAL INCREMENT; pp. 8–16

APPLICATION OF THE METHOD OF ITERATIVE MOVING AVERAGE FOR DETECTING BIRDS’ MIGRATION WAVES; pp. 17–26

OPTICAL MEASUREMENTS IN PÄRNU BAY; pp. 27–37

EXPERIMENTAL STUDIES ON THE ATTENUATION OF UNDERWATER SOLAR IRRADIANCE IN SOME REGIONS OF THE BALTIC SEA AND SKAGERRAK; pp. 38–48