Effects of habitat on ant functional groups: A case study of Lüchun County, Yunnan Province, China RZWQM simulation of nitrogen transport and loss under winter wheat/ summer maize rotation system in the North China Plain Differences in maize photosynthetic characteristics and nitrogen regulation effects in maize/soybean and maize/sweet potato relay strip intercropping Nitrogen use efficiency in stereoscopic planting rice field in North China Spatial distribution characteristics and impact on spring maize yield of drought in Northeast China Food security should be the ultimate goal of agricultural modernization in China Response and adaptation to climate change of agriculture and environment in Northeast China Grain increase in Northeast China under climatic change Tri-giant leap from red to black and then to green revolution in China in one century Driving factors and their contributions to agricultural CO2 emission due to energy consumption in China: Based on an expended Kaya identity and LMDI decomposition method Agricultural greenhouse gases emissions and influencing factors in China Numerical Cytotaxonomic Studies of Hemerocallis (Liliaceae) from China Comparative study on yield and economic benefits of rape under different planting and mulching patterns Comprative studies of the Ecological Agriculture Between China and the Western countries Desertification Problem and Its Control Strategy in Northern China