Research advance of the expansion machanism,effect factors and high-yield breeding in popcorn Soil respiration of forest ecosystems and its respondence to global change A review of nitrogen allocation in leaves and factors in its effects Effects of Different Culture Conditions on Isoflavones Content in Callus of Alfalfa VARIATIONS OF WOOD PROPERTIES AND CHARACTERISTICS AND A TENTATIVE SELECTION FOR STRUCTURAL TIMBERS OF CUNNINGHAMIA LANCEOLATA PROVENANCES EFFECT FACTORS OF SOIL RESPIRATION AND THE TEMPERATURE‘S EFFECTS ON SOIL RESPIRATION IN THE GLOBAL SCALE Research Progress of Multi-Scale Pore Structure and Characterization Methods of Wood