30 



BULLETIN 526, U. S. DEPARTMENT OF AGRICULTURE. 



Table XXIV. — Grade and length of lint of five different varieties of cotton grown under 

 single-stalk and old-method systems of culture in 1915. 



Grower and system of culture. 



K. K. Bonev: 



Old method. . 



Staple stalk.. 

 John Hebert: 



Old method. . 



Single stalk . . 

 J. E. Tanner: 



Old method. . 



Staple stalk . . 

 D. Sloan: 



Old method. . 



Single stalk . . 

 M. Sanderson: 



Old method. . 



Single stalk . . 



H 



Grade. 



Strict Middling. 

 do 



Good Middling. 

 do 



.do. 

 .do. 



Strict Low Middling. 

 do 



Strict Middling. 

 Good Middling. . 



Length 

 of staple. 



Inches, 



1 

 1* 



Table XXIV shows that there was practically no difference in the 

 lint from the different systems of culture. In three instances the 

 length of lint was slightly (^ inch) greater for single-stalk culture, 

 and in two instances the lengths were identical. In no instance did 

 the lint from the old-method samples show any superiority in length 

 or grade over that from the single-stalk samples. 



SUMMARY. 



Under an informal cooperative agreement with the Office of 

 Extension Work in the South of the States Relations Service, 21 

 experiments with single-stalk cotton culture were conducted in 1915 

 in nine parishes and counties of three States, namely, Louisiana, 

 Arkansas, and North Carolina. 



These experiments were located in ordinary fields of cotton, single- 

 stalk culture usually being compared with older methods in alternate 

 rows or in alternate blocks of 2, 3, or 4 rows. In one instance the two 

 systems were compared on an acre basis. 



In all cases the old-method rows were thinned in the usual manner 

 at the usual time, while the single-stalk rows were thinned later and 

 the plants were left closer together than usual, as is required by this 

 method. In all other respects the rows received identical treatment. 



All picking was done under the direction of either the farmer him- 

 self or the county or parish agent directly interested and a record of 

 the yields forwarded to Washington. 



There was no significant difference in the lint produced by the 

 different systems of culture, the lint percentage, the size of the seed, 

 the lint index (grams of lint on 100 seeds), and the grade and length 

 of lint remaining about the same. 



Looking at all of the experiments as a group it is seen that single- 

 stalk culture gave greater total 3 r iclds in 18 of the 21 instances; it 

 gave greater yields at the first picking in 16 of the 21 instances; it 



