VIKLD, ETC., AS AFFECTED BY GROWING PERIOD. 



105 



Table 34 is a summary of the same plants, tabulated according to 

 the percentage of proteid nitrogen. 



It is very evident from these tables that the early-maturing plants 

 are the most prolific. The weight of the average kernel remains very 

 uniform, so that the later maturing plants do not appear to have pro- 

 duced shrunken kernels. Evidently the plants ripening during the 

 first four days produced the largest amounts of grain, and their ker- 

 nels were as heavy as those produced later. The smaller productive- 

 ness of the later maturing plants in the season of 1903 does not appear 

 to have been due to a shrunken or light kernel. 



The percentage of proteid nitrogen appears to be somewhat less in 

 the grain of the early-maturing plants. The number of grains of 

 proteid nitrogen in the average kernel is likewise less in these early- 

 mat uring plants. 



The relation of length of growing season to both yield and compo- 

 sition of grain is contrary to what might have been supposed. A 

 long growing period without excessively hot or dry weather might 

 naturally be thought to increase the yield and increase the percentage 

 of carbohydrates in the grain. 



The season of 1904 was very similar to that of 1903 up to time of 

 wheat harvest. The data for 1904, when tabulated, will serve as a 

 check on the results obtained in 1903. 



TABLE 31 . Yield and nitrogen content of grain, tabulated according to length of growing period. 

 DATES RIPE: JULY 7 TO 11, 1903. 



