1923] Variation of Protein Content of Corn 59 



Analysis of Additional Varieties 



We have given the analyses of additional varieties which we shall 

 include in our investigations. 



Blanchard's White is a prolific corn, rich in protein, and White 

 Cap is a yellow corn, also rich in protein. The former will be planted 

 both in North Carolina and West Virginia with seed grown in North 

 Carolina. The latter will be grown in both states from seed produced 

 in West Virginia. 



Investigation of Immature Corn 



We give the analyses of immature corn of two varieties under I 

 and J. Both show a diminution in protein. It is very evident that 

 this presents another very serious difficulty, making it necessary to 

 select in the field the ears that compose the sample in order to avoid 

 getting ears not fully matured. 



Taking of the Samples 



The samples taken for analyses were made up of grains taken 

 from at least twelve representative ears. These grains were ground 

 and thoroughly mixed. 



The analysis of single ears chosen from three of the varieties 

 studied would indicate considerable variation in protein in ears of the 

 same variety amounting to as much as 0.5^. Possibly the breeding 

 factor enters here to complicate our problem, and points to the neces- 

 sity of taking larger samples. 



Tables Giving Results of Anali'ses, 1923 



All analyses made with three gram samples. 



Corn A, White Plume, grown near Davidson, N. C, 1922. 



Nitrogen Protein 



No. 1. 1.236% 

 No. 2. 1.244% 

 Mean 1.240% 7.75%, 



Corn B, White Plume, seed grown in North Carolina in 1921, the sample analyzed 

 grown in West Virginia in 1922. 



Nitrogen Protein 



No. 1. 1.334% 

 No. 2. 1.362% 

 No. 3. 1.325% 

 Mean 1.340%, 8.377o 



