accumulative temperature 第1页

Effect of Sowing Date on Yield and Characteristics of Photosynthesis and Matter Production of Different Types in Mechanical Transplanted Rice Spatial and temporal variations in optimum sowing date of winter wheat in Shijiazhuang City Biological comparisons between putian population and dalian population of manila clams Ruditapes philippenarum Study on ecological adaptability of alfalfa introduced from foreign countries in BeUing area FACTORS TO AFFECT THE VOLTINISM OF THE PINE CATERPILLAR DENDROLIMUS TABULAEFORMIS IN BEIJING AREA