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島根大学農学部研究報告 12 巻
1978-12-15 発行
収穫期のことなるイネの発芽を阻害するPCPの濃度
Concentrations of PCP inhibiting the Germination of Rice Seeds harvested in Different Seasons
長澤 純夫
春山 博
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The problems of adjustment for a natural response rate C in probit analysis were fully discussed by Finney. He gave the maximum likelihood method for estimating the parameters of dosage-response relation. It is not unusual, however, that experimenters must compare the two dosage-response curves came from materials having natural response rates C_1 and C_2. In this case, minute modifications for some formulae shown by Finney are necessary to calculate the relative susceptibilities of testing organisms coming from different sources as mentioned above. As a numerical example, the procedure was illustrated by the experimental data comparing the inhibitory concentrations of PCP for the emergence of rice seeds harvested in different seasons.
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