By research of Populus davidiana,Betulaplatyp hylla,Pinus tabulaeformis and Quercus liaotungensis community characteristics in hilly-gully regions on the Loess Plateau in north of Ziwuling,the results showed that in the progress of succession,soil moisture content from large to small is Populus davidiana>Betulaplatyp hylla>Pinus tabulaeformis >Quercus liaotungensis.Soil moisture influenced biomass of trunk and brunch largely.For the difference of terra condition and distribution,forest community g...
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