Influence of Sample Numbers of Offspring Tested on Genetic Analysis of Quantitative Traits Changes and Regulation of Stress Ethylene Production and Polyamine Content in Spring Wheat Leaves Exposed to O3 Spring Bud Number and Dynamic of the Planted Pharmaceutical Raw Material Forest of Taxus yunnanensis ECOLOGICAL AND BIOLOGICAL DIFFERENCES BETWEEN SPRING AND AUTUMN PLANTS OF TWO DESERT EPHEMERALS CHARACTERISTICS OF PHOTOSYNTHESIS AND BIOMASS ALLOCATION OF SPRING EPHEMERALS IN THE JUNGGAR DESERT Temporal and spatial variations of soil NO3--N in Orychophragmus violaceus/spring maize rotation system in North China. Climatic suitability model for spring maize in Northeast China. Impacts of drought stress on the growth and development and grain yield of spring maize in Northeast China. Responses of spring corn growth and yield in a cold area of China to field warming at nighttime during preanthesis stage. The netz-phytoplankton community of the Central Bohai Sea and its adjacent waters in spring 1999 Effect of micro-irrigation with rainwater catchment on the yield and w ater use efficiency of spring wheat in the northwest of the Loess Plateau Phenology of Batrachospermum acuatum in Xin’an Spring of Shanxi Province,Shanxi Province The relevant factors of callus induction of early spring ephemeral Lachnoloma lehmannii (Brassicaceae) Nitrogen Assimilation, Transfer and Utilization in Relation to Grain Protein Content and Yield of Spring Wheat Genotypes Differing in Quality Constructions of Elite ph1b Winter Wheat Lines and the Application of the Marker-assisted Selection Preliminary report of early spring plants of Jiufeng Mountain Region in the middle of Ying Mountain Research on physiological and biochemical changes of growing spring shoots of Taxus media