夏谷要丰产“六改”是关键夏各是孟村回族自治县栽培的主要粮食作物之一。为了改变其低产面貌，１９９４年在全县范围内推行了夏谷“六改”高产优化栽培技术，使４．７万亩夏谷平均亩产比前三年提高了８４．４公斤，增产率达到４０．３％。其主要内容是：一、改用优良品种... Summer Valley to yield “six changes” is the key Summer is the Mengcun Hui Autonomous County cultivated one of the major food crops. In order to change its low-yielding appearance, the high-yielding and optimized cultivation technique of “six changes” in Xiagu County was implemented throughout the county in 1994, so that the average mu yield of 47,000 mu of summer valley was increased by 84.4 kg over the previous three years, Reached 40.3%. Its main content is: First, switch to good varieties ...