Abstract:The climatic impacts on crop yields and their transitivity are studied in He′nan Province,The regional climate is crossed by the transition zone from the subtropical to temperate zone.According to the regional distribution of the total affecing coefficients and their ranges of precipitation,temperature and sunshine duration,We divide He′nan Province into 3 affecting regions of precipitation ,3 affecting regions of temperature and 6 affecting regions of sunshine duration respectively.Using the method of run...