. Annual report of the Maine Agricultural Experiment Station . Rows grown in +Selection. + — 1911 1912 1913 1914 1912 1913 1914 1913 This table shows that the only instances in which the deviationcan be significantly beyond the expected ratio of 50 per cent,are the rows in the years immediately following the selection(italics). Unfortunately if we attempt to determine the probableerror of these ratios we get into trouble from the manner inwhich the sampling was done. Whatever may be the signifi-cance of the individual rati
. Annual report of the Maine Agricultural Experiment Station . Rows grown in +Selection. + — 1911 1912 1913 1914 1912 1913 1914 1913 This table shows that the only instances in which the deviationcan be significantly beyond the expected ratio of 50 per cent,are the rows in the years immediately following the selection(italics). Unfortunately if we attempt to determine the probableerror of these ratios we get into trouble from the manner inwhich the sampling was done. Whatever may be the signifi-cance of the individual ratios, the fact that the excess is in thesame direction and fairlv large in each of the three vears makes 22 MAINE AGRICULTURAL EXPERIMENT STATION. 1915- it probable that, on the whole, some significance may be attachedto them. Before discussing this point further we will examine the rela-tion of the average size of the deviation in the plus and minusrows. These averages are given in tables 3 to 5. Their relationto each other will be made simpler by figure Fig. 2. Showing the average deviation per plant row, mrelation to the character of the selection. The years given inthe figure are those in which the designated rows were grown. Selection in 1911 Selection in 1912 Selection in 1913 ■— STUDIES ON OAT BREEDING. 23 From this figure it is seen :— 1. That in every case the plus selections have shown a largeraverage deviation in the plus direction. 2. The minus selections on the other hand do not show sucha regularity. In only two out of the siix cases is there a largeraverage deviation in the direction of the selection. 3. It is of interest to note that the average deviation perplant row is much smaller in 1913 than in the other two has been pointed out in a previous paragraph that the 1913yields were much lower than in the other years. It has alsobeen noted that there is an excess of rows showing minus devia-tions in this year. This latter fact is evidently asso
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