发帖
雷达卡
IN the article with the above title which appears in NATURE of Oct. 25, p. 667, it is stated: ``Beaven's half drill strip method is described, but without pointing out its two serious but remediable defects : that the continued use of one half of the drill for one variety, and of the other half for the variety with which it is to be compared, may introduce a constant difference the magnitude of which cannot be estimated ; and that the regular alternation of strips of the two varieties does not permit of a valid estimate of experimental error.''
若能收集到该词条相关资料的跟帖者给予奖励，根据收集资料的水平给予10～200不等的论坛币，当然也可以谈谈自己的观点、其应用领域、上传资料、相关软件介绍等等，请大家尽量不要复制一些搜索引擎很容易收集到的资料。
我每天都会发送不等数量的词条，所以诚邀不同统计背景的各路大侠发表评论。
欢迎大家多多跟帖！要数量也要质量哟
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