Authors: Xu Jiali; Chen Rong; Liu Tangjiang; Zhu Jingyu; Sun Yanxing; Liu Xiaocun; Meng Guangmiao; Lin Junxiong; Zheng Hua; Shi Hua; Xu Beiyin; Cao Zhiguo; Jiang Yuanming; Wu Guanying, etc
Xu Guangqi, a ming dynasty scholar, was a pioneer in the exchange between China and the West, and the initiator of Shanghai civilization. He devoted his life to the study of mathematics, astronomy, calendar, water conservancy, etc., and wrote diligently, especially in agronomy. It made important contributions to the cultural exchange between China and the West in the 17th century.
One day, Xu Guangqi (Ming Dynasty scientist, 1562-1633) found a vegetable he had never seen before in a student's home, was very interested, and said that he was about to try planting it in Shanghai. The student's parents told him: "This dish was given by a Shandong guest named Turnip. I heard that the south can not be planted, in the south to grow the turnip will become cabbage. ”
Xu Guangqi didn't quite believe this. He checked the Materia Medica and the Tang Materia Medica, and indeed there are such statements. However, the question mark still did not clear in his mind. Xu Guangqi asked the parent of the student to get some turnip seeds to try to plant in Shanghai.
After pondering, he decided to divide the seeds into two types: one would only water the manure as the southerners would grow vegetables; the other would use the method of the northerners to first use sufficient rain manure as the base fertilizer, and then water some water and manure, and loosen the soil diligently. When it comes to harvest season, the leaves of the vegetable that are only watered with manure grow large, the roots are very small, and it is indeed a bit like cabbage.
The root of the one with dried dung grew very large, exactly like the turnip in Shandong. When Turnip was finally able to "settle down" in the south, Xu Guangqi excitedly told the students: "Books must be read, and reading can increase knowledge." However, you cannot be superstitious about books. Although it is written in a book, it is an hearsay and unreliable word. Reliable or unreliable, as soon as it is tested, it will be known.