26 BULLETIN 1473, U. S. DEPARTMENT OF AGRICULTURE 
COMPARISON OF TWO PLANTS EVERY 12 INCHES WITH ROWS LEFT UNTHINNED 
One experiment was a comparison of unthinned rows with rows in 
which two plants were left every 12 inches or as near this distance as 
was possible. An attempt was made to leave two plants in a hill, 
but because of an uneven stand this was not possible, as the plant 
count will show. A number of plants in the thinned rows died after 
the thinning had been done, which further reduced the accuracy of 
the spacing. 
A daily flower count on the two inside rows of each spacing for a 
period of over two weeks revealed no consistent difference in the num- 
ber of flowers produced on any day or for any period during the time 
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Fic. 12.—Yields (in pounds) of seed cotton per row from comparison of two plants 
every 12 inches with unthinned rows, Greenville, Tex., 1924 
the counts were made. The rather poor stand in the unthinned rows 
may account partially for this behavior. (Table 12.) 
Out of the 21 comparisons of the sum of the two inside rows, | is 
equal, 9 are in favor of the unthinned blocks, and 11 are in favor of two 
plants every 12 inches. In most cases the increase in yield of one 
spacing over the other is very slight. The mean difference in yield 
between the two inside rows of each spacing was 0.140.076 pound, 
which is not significant, and both spacings may be regarded as yielding 
equally well. From Figure 12, in which the yields are shown graphi- 
cally, no consistent difference is apparent between the two spacings. 
There was a decided tendency in this experiment for the two plants 
every 12 inches to produce more cotton in the first picking than the 
