50 



The Bulletin. 



VARIATIONS IN PER CENT OF LINT. 



Continuing a study of tlie same varieties as were used in the study of 

 variations in yields it will be seen that there is also a variation in per cent 

 of lint, both on the same soil and on different soils. This can be shown best 

 by following the same methods as were used in showing differences in yields, 

 namely, tables. 



1903 



1904 



Russell's Big Boll: ; 



Edgecombe Farm - 32.39 



Red Springs Farm | 34.38 



Iredell Farm -- 



Culpepper's Improved: 



Edgecombe Farm 31 .62 



Red Springs Farm.. 37.50 



Iredell Farm. 



King's Improved: 



Edgecombe Farm 36.60 



Red Springs Farm 39.05 



Iredell Farm. 



Excelsior Prolific: 



Edgecombe Farm.. 



Red Springs Farm 



Iredell Farm 



Edgeworth: 



Edgecombe Farm 



Red Springs Farm 



Iredell Farm 



Cook's Improved: 



Edgecombe Farm 



Red Springs Farm 



Iredell Farm 



Simpkins' Improved: 



Edgecombe Farm 



Red Springs Farm 



Iredell Farm 



37.50 



34.39 

 32.81 

 35.05 



35.83 

 37.50 

 34.45 



39.20 

 40.62 

 37.84 



36.56 

 40.62 

 35.45 



35.37 

 35.94 

 36.58 



1905 



31.75 

 35.70 

 34.98 



33.07 

 37.39 

 34.98 



1906 I 1907 



32.56 i 31.23 



35.26 

 34.42 



1908 



31.95 



31.08 

 35.37 



33.80 



38.21 ! 1 35.08 



39.61 

 37.10 



35.42 

 39.61 

 37.58 



33.33 

 37.15 

 35.34 



37.09 



40.89 

 40.87 



39.19 

 40.93 

 39.49 

 33.99 



36.52 



32.10 



37.40 

 37.92 

 36.21 

 37.09 

 32.81 



35.21 34.88 37.21 



39.03 39.09 



37.61 



38.61 



39.71 

 35.99 ! 36.68 



- 37.61 



1909 



24.90 



Aver. 



34.10 

 36.60 



34.60 

 35.70 i 



37.50 

 41.20 



38.00 j 

 ] 

 34.40 



35.20 

 40.20 



38.90 

 39.30 

 37.70 



31.31 

 34.27 

 34.71 



33.89 

 37.19 

 34.75 



37.03 



39.76 

 37.68 



38.06 

 39.21 

 37.52 



33.66 

 36.54 

 35.73 



38.80 

 40.89 

 39.27 



37.32 



37.65 



*Farm discontinued. 



By looking over the column of averages it will be seen that without excep- 

 tion the average per cent of lint for all the varieties was higher on the Iredell 

 farm than on the Edgecombe farm. It will also be noticed that with 

 only one exception the percentage was higher on the Red Springs farm 

 than on either of the others. True, the Red Springs tests were 

 only continued three years. The Edgecombe farm, by reason of its rich soil, 

 its long season and other natural advantages is the nearest ideal for cotton 

 production of the three farms, Iredell farm, because of its short season, 

 heavy soil, cool springs, is the poorest farm for cotton production of the 

 three. Then why this decided difference in per cent of lint in favor of the 

 Iredell farm? It is known that lint consists largely of carbon and that car- 

 bon comes through the leaves of the plant. Cotton on the Edgecombe farm 

 suffers greatly from leaf rust, sometimes almost stripped of leaves; on the 

 Iredell farm leaf rust is almost unknown. The natural supposition would 

 be that the cutting off of the leaf area and consequently the amount of carbon 

 in the plant limits the percentage of lint. There has been no investigation 

 along this line, so this is a mere supposition. Yet it would appear that the 

 farmer can well consider the rust resistant properties of his cotton. 



