Impact of weather on vegetable price resilience— A case study of the local cucumber in Shijiazhuang City Study on seasonal variation in carbon isotope composition correspond with soil temperature and humidity and weather factors for main greening tree species A quantificational study on the relationship between saccharide content of medlar and surrounding factors Associations between weather factors and the spring migration of the horned gall aphid, Schlechtendalia chinensis Simulation of Diurnal Variation of Weather Factors and Photosynthesis of Individual Tomato Leaves in Greenhouse