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1980、1981年间,我们曾对晚粳秧苗素质进行了多次测定,偶然发现秧苗地上部分体积与其千重之间存在稳定的相关关
Between 1980 and 1981, we conducted several tests on the quality of late japonica rice seedlings. Occasionally, we found that there was a stable correlation between the above-ground part of the seedlings and their thousand-kilogram weight