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1990年11月,云阳县农民技术学校校长冯春荣在自家屋顶上收挖一蔸净重达22.4公斤的大窝红苕。这蔸红苕是在学校要求专业课教师理论与实践相结合,亲自动手于6月1日栽下的一根南薯88。据他介绍说,栽培以前进行了土壤质地改良,结合增施有机清肥,注重以钾肥作基
In November 1990, Feng Chunrong, headmaster of Peasant Technical School in Yunyang County, dug a large nest of red crabs weighing 22.4 kg on his roof. This 蔸 苕 苕 is a combination of theory and practice in the school professional teachers, hand-made on June 1, a potato 88 planted. According to him, said before the cultivation of soil texture improvement, combined with organic fertilizer increase, focusing on potassium as a base