24 INFLUENCE OF ENVIRONMENT ON SWEET CORN. 



seems that these observations may also be used to good effect in 

 breeding a corn low in cob and husk percentage and high in kernel 

 percentage. Another point is the wide variation of sugar content 

 found in the individual ears, the highest percentage of sugar in the 

 Stowell Evergreen corn being 40.56 per cent and the lowest 8.45 per 

 cent of the total dry matter. In the Crosby variety a maximum of 

 45.55 per cent and a minimum of 19.54 per cent were found. 



The general effect of environment on the sugar content of the corn 

 is best represented by the graphic charts, and from a study of these, 

 together with the preceding data, the following conclusions have 

 been reached : 



In figure 1 are platted the percentages of sugars in the two varieties 

 of corn, the temperature, the altitude, and the average length of day 



SuGAfi wSroweu. EvR6ftM Co/f/v 



FIG. 1. Percentage of sugar in the corn, temperature, altitude, and average length of day at 



different stations, 1905. 



the 



at the several stations. There is a wide difference in the percentage 

 of sugar present in the two varieties, the lowest average sugar content 

 for the Crosby variety (30.44 per cent at New Haven) being 2.49 per 

 cent higher than the maximum average for the Stowell Evergreen 

 variety, that at Clemson College. In both varieties the highest per- 

 centage of sugars is found at the South Carolina station, while New 

 Jersey has the lowest percentage for the Stowell Evergreen, and New 

 Haven the lowest for the Crosby. The Maine corn is only 3.29 per 

 cent below South Carolina for the Crosby variety. The Maryland 

 station figures are only slightly below those for South Carolina, and 

 Connecticut is about hah* way between Maryland and New Jersey for 

 the Stowell Evergreen. 



In studying these variations it must be remembered that the 

 character of the soils and the differences in fertilization should be 



