444 



BULLETIN No. 127. 



[August, 



TABLE 21. VARIATIONS IN TOTAL NITROGENOUS MATTER. (CROP OF 1902, EARLY 



OHIO. DRY BASIS) 



The mode of nitrogenous matter is here between 15 percent 

 and 1 6 percent. This is an amount of nitrogenous matter not to 

 be despised. If the nitrogenous matter could be raised in the same 

 proportion, when by cultivation under better conditions, a higher 

 dry matter is obtained, there would be a food containing at least 

 as much actual proteid nitrogen as many varieties of maize. It is 

 highly probable that the two extreme high variations should be dis- 

 regarded as errors, although potato No. 13 with a content of nitrog- 

 enous matter of 27.46 percent, weighed only 87 grams, which 

 might account for rather high nitrogen content. The other tubers 

 varied in weight from 150 to 300 grams. 



Twenty tubers were selected for the high protein plot and fif- 

 teen for the low protein plot, selecting on the fresh basis, as before. 

 The analyses of the individuals selected for planting are shown in 

 Tables 22 and 23. 



TABLE 22. HIGH PROTEIN SELECTIONS. 1903 



