THE DIRECT DETERMINATION OF THE GEOBIOCEN EDAPHIC-TROPHIC ORDERS AND INTERORDERS

The following ecological amplitudes of sail PHH2O for the floristicall y identifiable edaphic-trophic orders and interorders of geobiocens ha ve been determined: oligotrophic<3.9, hemioligotrophic 3.9 - 4.9, meso trophic 4.9 - 6.0, hemimesotrophic 5.5 - 6.0 (the active carbonates or easy soluble salts within the reach of calciphyte or halophyte roots) , heminitrotrophic 6.0 - 7.2, nitrotrophic 6.0 - 7.2 (>70 % of the soi l skeleton, more humose and airy soil), hemieutrophic 7.2 - 8.6, eutro phic >8.6. Each trophic order and interorder has been divided into two suborders dependent on the actual reaction of the surface humus, 0 - 5 cm layer of the mineral soil and the other part of the mesophyte, ni trophyte, calciphyte or halophyte root zone.