Soil nitrogen and enzymes involved in nitrogen metabolism under different vegetation in Ziwuling mountain in the Loess Plateau, China Comparison of the Attributes of Natural Forests and Plantations in Ziwuling Mountain Organic carbon storage in the vegetation biomass in secondary forest region of Ziwuling Mountain Isolation,Identification and Cultivation of Ectomycorrhizal Fungus Handkea utriformis in the Rhizosphere of Pinus tabulaeformis community successional series in the Ziwuling area on the Loess Plateau Interspecific association among the plants communities in the forest at Ziwuling Area in Shaanxi Province The impacts of accelerated erosion on soil nutrient loss and microbial quantity following deforestation in the Ziwuling area Floristic analysis of seed plants in Ziwuling Forest Region The Successional Recovery Process of Plant Communities in Ziwuling Are and Classification and Ordination of Environmental Factors Plant Species Diversity and the Relation with Soil Properties in Natural Succession Process in Ziwuling Area Structure and Dynamics of Natural Pinus tabulaeformis f.shekannesis Populations in Ziwuling Forest Region of the Loess Plateau Effects of Ecosystem Conversion on the Characteristics of Soil Organic Carbon in Ziwuling Forest Region Photosynthetic Physiological and Ecological Characteristics of Betula platyphylla-Quercus liaotungensis Mixed Forests in Ziwuling Forest Area The vegetation development in North Ziwulin forest region in last fifty years Interspecific Association of Medicinal Herbs in Ziwuling Region Hydraulic Architecture of Three Typical Woody Plants in Ziwuling Forest Zone on the Loess Plateau Nutrient and carbon pools in both natural and artificial Pinus tabulaeformis in Ziwuling Region RELATIONSHTP OF ECO-ENVIRONMENTAL CHANGE AND NATURAL EROSION AND MAN-MADE ACCELERATED EROSION Soil microbial biomass nitrogen and carbon, water soluble nitrogen and carbon under different arbors forests on the Loess Plateau Species Diversities of Major Communities in Malan Forest Region of the Loess Plateau Effects of vegetation rehabilitation on soil saturated hydraulic conductivity in Ziwuling Forest Area Temporal and spatial change characteristics of soil elements in reclaimed slope forestland The change of plant diversity during natural recovery process of vegetation in Ziwuling area Natural succession and evolution of structural characteristics of forest community in Ziwuling area on the Loess Plateau