The dynamic effects of monsoon rainfall shocks on agricultural yield,wages, and food prices in India*

This paper shows that, first, the effects of monsoon rainfall shocks on agricultural yield in India are highly asymmetric: yield falls strongly after droughts, whereas excessive rainfall has only little effects. Second, our key novel finding is that the short-lived yield loss after a widespread drought elicits a persistent decline (increase) in wages (food prices), which lasts for up to five years. Third, affiliation to the same National Sample Survey region (and thus to the same state) seems to be a key determinant of internal migration, whereas distance appears more relevant for food arbitrage trading.     

接好断链,实现循环,促进粮食单位产量提高

有效提高粮食单产是保证粮食总产量最积极有效的途径。促进有机质更多地还田,不断保护和提升土壤质量,是最经济、有效、可持续的办法。同时还能达到环境效益、生态效益及社会效益等多重目标。该文提出增加土壤有机质,实现农业生产良性循环的举措。     

中国粮食增产潜力主要影响因素分析

该文从增加粮食播种面积与提高粮食单产两方面,综合分析了影响我国粮食增产潜力的11个主要因素。研究结论认为:粮食单产依然是今后几年影响我国粮食生产的最重要因素;粮食播种面积对粮食生产的影响程度在逐年加强,有可能在不久的将来,替代单产成为第一主要因素。自然环境因素、有效灌溉面积、国家政策、农业劳动力素质、农业机械化水平、生物防控技术和化肥使用量等,也都是影响我国粮食生产的重要因素。