The study of diversity in Shenweigou of Guandi Mountain,Shanxi province Study on niche of dominant species of subalpine scrubland and meadow community in Guandi Mountains Niche Analysis of Dominant Species in Shenweigou of Guandi Mountain Population Structure and Spatial Distribution Pattern of Natural Regeneration Larix principis-rupprechtii in Guandi Mountain Interspecific Relationships of Dominant Species of Sub-alpine Scrub Community and Sub-alpine Meadow Community in the Guandi Mountains STUDIES ON CHROMOSOME OF SOME PLANTS FROM GUANDI MOUNTAIN,SHANXI Spatial distribution patterns and associations of tree species in typical natural secondary mountain forest communities of Northern China Spatial Variations of Soil Organic Carbon and Nitrogen of Forestland in Guandi Mountain Variable Growth Intercept Models for Forest Site Evaluation and Its Application ON THE FLORA OF SEED PLANTS IN GUANDI MOUNTAINS,SHANXI Diversity of Soil-Animal Community in the Planted and Natural Larix principis-rupprechtii Forest in Guandi Mountain THE VERTICAL BELTS OF NATURAL VEGETATION PARTITIONING OF THE GUANDI MOUNTAINS BY USING ORDERED PLOT CLUSTERING,SHANXI,NORTH CHINA