Resistance of high quality wheat variety ‘Xiaoyan 54’to environmental stress and diseases in south of Henan Province Study on optimal sowing density and fertilizer application rate for cultivating high quality wheat Xiaoyan 54 in Beijing Area Characteristics of grain filling and flag leaf photosynthesis of high quality wheat under different planting dates Effect of pesticides on yield and quality of high quality wheat Photosynthetic characteristic and quantitative simulation of high quality wheat“8901-11-14”at the jointing stage in Huang-Huai-Hai Plain