INFLTKNCK <>F SPECIFIC GRAVITY OF SEED KERNEL. 



37 



Ki'rnicko and Werner" quote the experiments of Reiset to show 

 that shriveled kernels have a higher nitrogen content than plump 

 ones. With different varieties of wheat he found the following: 



Carleton* records the weight of 100 kernels and the percentage of 

 ' albuminoids ' ' in sixty-one samples of wheat from various parts of 

 the world. Dividing these into classes according to the weight of 

 100 kernels we have the following: 



Reviewing these experiments there would seem to be no doubt 

 that shrunken kernels contain a higher percentage of nitrogen than 

 do well-filled ones, but as between large and small kernels, both of 

 which are well filled, there is not a great deal of information. Snyder's 

 experiments are the only ones that cover this ground, but they are 

 extensive and very uniform, and may be considered as deciding the 

 question in favor of a higher nitrogen content for the large kernels, 

 so far as small, plump kernels and large, plump kernels are concerned. 

 But, as small and light kernels are usually not plump, taking the 

 crop as a whole and dividing it equally into large and small or 

 heavy and light kernels, the evidence would be in favor of the small 

 or light kernels for high nitrogen content. As between wheats from 

 different regions and of different varieties, those having small kernels 

 are generally of higher nitrogen content. 



IXFLIK.M K OF THE SPECIFIC GRAVITY OF THE SEED KERNEL UPON 



YIELD. 



Sanborn^ separated seed wheat with a sieve into large, medium, 

 small, and shriveled kernels. The large seed was separated by means 



"Handbuch des Getreidebaues, 1, pp. 52Q-521, Berlin, 1884. 



6 U. S. Department of Agriculture, Division of Vegetable Physiology and Pathology, 

 Bulletin 24. 



<* Abstract, Experiment Station Record, 5, p. 58, from Utah Experiment Station Report, 

 1892, pp. 133-135. 



