Journal of the American Society of Agronomy, 1918, Vol. 10 (Classic Reprint)

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Excerpt from Journal of the American Society of Agronomy, 1918, Vol. 10Considering a sample from its point of origin the first source of variation is in drawing a small sample from a large bulk. The ac curacy with which this sample represents the bulk depends upon the uniformity of the latter. This would depend. Upon the uniformity of the field or whether different lots had been mixed to make up the stock. When samples are drawn and mailed by various parties, there is greater possibility of variation than if all could be taken by the same person. When the analyst receives the sample and takes from it a standard sample for analysis the same factors are again operative.Before the standard laboratory sample is taken, the entire lot should be mixed as thoroughly as. Possible. If the seed has been well cleaned, it is doubtful if any mixing is necessary. In poorly cleaned seed there are usually elements of different nature which tend to col lect at certain places, such as sand, fine dirt, or small seeds at the bottom, and broken stems, etc., at the top. In such samples it may be difficult to make an even mixture, and it is desirable to separate such materials roughly from the entire sample. It may be Observed that in such cases the error in drawing the sample from the bulk is likely to be large, and a careful analysis is scarcely worth the while.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.