senilism means the phenomenon that cotton plants partly or integratedly stop the vital movement before their time which has effects on the output and quality of the cotton in the effective breeding season caused by its own or external reasons.Senilism can bring the reduction of output of the cotton fields,seriously effects the quality of the cotton fibre and cause the drop in various degree on various norms of the cotton fibre like length of the fibre,Micronaire,fiber stress and so on.
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