Uniformity measurement in lots of rice seeds
1995
Torres, S.B (CPATSA-EMBRAPA, Petrolina (Brazil)) | Menezes, E.A. | Lucca Filho, O.A. | Franco, D.F.
The objective of this work was to verify the uniformity of lots of rice seeds (Oryza sativa L.), cv. BR IRGA 409, by the heterogeneity test. Eight lots of size 1-50, 51-100, 101-150, 151-200, 201-250, 251-300, 301-350, 351-400 bags were used, being submitted to the sampling intensities of 17, 25, 30, 40, 50, 60, 70 and 80 bags, respectively. The attributes tested were physical purity percentage, number of red and black rice seeds, number of dehulled seeds, germination percentage, and number of normal seedlings verified in the cold test. The results obtained allowed the following conclusions to be drawn: the lots up to 100 bags of rice seeds showed high uniformity; independently of the lot sizes and sampling intensities, the values of (H) did not show significant heterogeneity for the attributes studied, and the modified cold test was the best attribute for the determination of rice seed heterogeneity
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