Effects of Plant Sizes on the Nitrogen Use Strategy in an Annual Herb, Helianthus annuus (Sunflower) Size-symmetric competition in a shade-tolerant invasive plant Instant response of individual size inequality indices to thinning regimes in plantation. STUDIES ON THE REPRODUCTION AND PHOTOSYNTHETIC ECOPHYSIOLOGY OF THE EXOTIC INVASIVE PLANT, PLANTAGO VIRGINICA Relationship Between Growth Redundancy and Size Inequality in Spring Wheat Populations Mulched with Clear Plastic Film THE DYNAMICS OF SIZE INEQUALITY IN SPRING WHEAT POPULATIONS UNDER SEMIARID CONDITIONS AND ITS PHYSIOECOLOGICAL BASIS Effects of fertilization and grazing on species richness in an alpine meadow of Qinghai-Xizang Plateau Effect of potassium fertilizer and plastic film mulching on growth and size inequality in Lilium davidii var. unicolor