26 



BULLETIN 526, U. S. DEPARTMENT OP AGRICULTURE". 



high and had 4 to 6 leaves, were spaced 16 inches apart. The single- 

 stalk rows were thinned on June 24, when the plants, 8 to 10 inches 

 high with 10 to 12 leaves, were spaced 6 to 8 inches apart. 



Only one picking was made. The yield of each row as reported by 

 Mr. Peterson is given in Table XX. 



Table XX. — Roto yields obtained in a single-stalk culture experiment with cotton 

 conducted in 1915 by B. C. Peterson, Vanceboro, N. C. 



Row. 



Yield of seed cotton 

 (pounds). 



Row. 



Yield of seed cotton 

 (pounds). 



Single 

 stalk. 



Old 



method. 



Single 

 stalk. 



Old 



method. 



No. 1 



57 

 62 

 GO 

 56 

 69 

 66 

 64 



66 

 57 

 56 

 61 

 62 

 69 

 59 



No. 8 



69 

 76 

 70 



68 



No. 2 



No. 9 



70 



No. 3 



No. 10 



63 



No 4 



Total 







649 

 18 

 3 



631 



No. 6 







No. 7 



Increase per cent. . 









Table XX shows that in 7 of the 10 instances single-stalk rows 

 yielded more than the old-method rows. The difference in total 

 yield, however, due largely to a poor stand, was only 18 pounds, 

 or 3 per cent, in favor of single-stalk culture. 



Tabular Summary. 



The yields of seed cotton obtained from the 21 experiments dis- 

 cussed in the preceding pages are summarized in Table XXI. 



Table XXI. — Summary of yields obtained in 21 single-stalk culture experiments with 

 cotton conducted in 1915 in 9 parishes and counties in Louisiana, Arkansas, and North 

 Carolina. 



Picking and method. 



Yield of seed cotton (pounds). 



Louisiana. 



Arkansas, 



North Carolina. 



First picking: 



Single stalk 505 226 



Old method J380 177, 



Second picking: 



Single stalk '350 



Old method 300 



Third picking: 

 Single stalk... 

 Old method. . 



Total: 



Single stalk 855 



Old method 680 Is'. 



Increase (percent): 

 Gain or loss (— ) 

 for single stalk . . . 



26 



nor, 



287 227 

 207 200 



..149 

 ..140 



193'336 



229,338 



295' 195 



202 100 



615 123 

 780 112 



564 1,074 

 686 1,004 



353, 



78 



1,497 

 1,347 



325 



S50 765 



782 722 



287 376 



2D7:; io 



39 



488 , 531 

 491,498 



-0.6 7 



015123 

 780 112 



-17 10 



28 



917 1,074 

 7611,004 



20 



1, 821 

 1,672 



850 7(». r > 

 782 722 



9, 6 



620 

 510 



362 

 274 



47 

 33 



1,029 

 817 



019 

 031 



649 

 031 



i Actual yields not reported. 



