Competition Index and Application to Conservation Biology of Parnassius nomion The causal relationship of the decreased shoot and root growth of maize plants under higher plant density Competition of Beckmannia syzigachne with transplanted rape and its economic control threshold STUDIES ON THE BIOLOGICAL BASES FOR DYNAMICS OF ALOPECURUS POPULATIONS IN WHEAT FIELDS STUDY ON THE ECONOMIC THRESHOLD AND CONTROL FOR BROADLEAF WEEDS IN WHEAT FIELD Effects of Tree Competition on the Biomass Partitioning of Abies nephrolepis Influence of Orchard Sod Mowing on Nutrient Competition between Citrussinensis and Stylosanthes gracilis and Mechanisms DETERMINING BASAL AREA GROWTH PROCESS OF THINNINED EVEN-AGED STANDS BY CROWN COMPETITION FACTOR New Approach to Decide the Mixed Proportion for Establishing Chinese Fir and Broad-leaved Mixed Forest The Growth of Manglietia yuyuanensis Stand Mixed with Cunninghamia lanceolata and the Interspecific Competition between the Tree Species Intraspecific and Interspecific Competition of Pinus yunnanensis Natural Forest A review of belowground interspecific interactions and allelopathy in silvopasture systems Influences of Resource Availability and Intraspecific Competition on Elymus nutans Growth and Reproduction Tourism Competition Evaluation of the National Forest Park: a Way of Niche: A Case of Zhangjiajie and Tianmenshan National Forest Park