From the ecological viewpoint, the phytogeographical regions of China may be divided into three groups:(a) the forest regions in the east, (b) the steppe and desert regions in the northwest and northeast, and (c) the regions of high mountains and plateaus in the west and southwest. All these vegetation regions are closely related to the various main soil types.Of the forest group, the regions are, beginning at the north, (1) the coniferous forest-podzolic soils:(2) the mixed coniferous and deciduous broad-leaved forest-podzollic soils and brown forest soils;(3) the deciduous broad-leaved forest-brown forest soils and korichnevie soils;(4) the mixed deciduous and ervergreen broad-leaved forest-yellow podzolic soils and yellow-koriohnevifr soils;(5) the evergreen broad-leaved forest-yellow podzolic and red podzolic soils:and (6) the tropical monsoon rain-forest-yel low-lateritic soils.In the northwest apd northeast, we distinguish, beginning from the east,the following regions:(7) the forest steppesi-chernozem and ziero-korichnevie soils;(8) the steppe-chestnut soils;and (9) the semi-desert and desert-zierozem and desert sails. Solonchaks being widely present in the above-mentioned three regions are associated with halophytic vegetation.