Impact simulation of climate change on potential and rainfed yields of winter wheat in Southwest China from 1961 to 2010 Response of ‘Merlot’ grape berry quality and metabolome to meteorological factors at both low and high altitudes Influence of spatial heterogeneity of climatic and socio-economic factors on soil organic matter-A case study of the central Heilongjiang Province, China Evaluation of the suitability and influencing factors of winter rapeseed planting in Gansu Province