《Table 2 The Comparison of Nanking No.2905Wheat with Nanking No.26 (Bushels per Acre) (10, p.29)》

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《中美技术合作视角下的中国作物改良计划(1925-1931)（英文）》

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Full responsibility for the wheat research at Nanking resided with Shen，after he graduated from Cornell University in 1927.Under his direction，the wheat project made substantial progress at Nanking and at the cooperative stations.Nanking No.2905 was one of the most successful improved varieties in the PIP.In 1934，the Extension Department was set up in the CAUN for expanding the new variety of wheat，Nanking No.2905.Yields of Nanking No.2905 wheat compared with Nanking No.26 are listed in Table 2.When the comparisons were made，the average yield of Nanking No.2905 over a five-year period was 30bushels per acre.The gain over the Nanking No.26averaged 6 bushels per acre，or about 25 percent.Numerous tests showed that Nanking No.26 yielded about 7 percent more than the traditional varieties，therefore Nanking No.26 wheat would yield about32 percent more than the farmers’varieties if grown under similar conditions.Nanking No.2905 was also the variety of wheat grown with the largest acreage in China because of the resistance to lodging，early maturity，and the resistance to rust at that time.After ten years of testing from 1925 to 1934，Nanking No.2905 was extended in Nanking for four more years until 1938，and then this variety was extended in Sichuan for six more years until 1943.Its total acreage of extension amounted to roughly 1.3 million acres，which indicated that Nanking No.2905 had the most acreage of extension among all the improved varieties.28 After the Sino-Japanese War，Nanking No.2905 was planted in Jiangsu，Anhui，Sichuan，Shansi，Hubei，and other provinces.29