116 



3. A higher protein content is obtained when plants are grown 



in the shade than when in the hght. 



4. Ditto, when there has been a hniited amount of water. 



5. Ditto, W'hen the growing period is short, than when it is 



long. 



6. Ditto, when there is a high temperature at the time of ma- 



turing. 



7. Ditto, when the season of ripening following the blooming 



has been short — this factor being dependent upon the va- 

 riety, the supply of moisture and the temperature. 

 With sugar beets it has been found possible to greatly increase 

 the sugar content by selection. In corn also the content of fat, 

 carbohydrates or of protein has been increased by selection along 

 the proper lines. With wheat, selection has not been so uni- 

 formly successful, since climatic factors have been found to in- 

 fluence the composition more than all other factors combined. 



In Bulletin 128 of the Bureau of Chemistry of the Department 

 of Agriculture we learn — 



That Crimean wheat grown in Kansas in 1905 had 16.22% of protein 



When grown in Kansas in 1906 from Kansas seed 19.13% of protein 



When grown in Kansas in 1907 from Kansas seed 22.23% of protein 



When grown in Kansas in 1907 from California seed. . . .22.23% of protein 

 When grown in Kansas in 1907 from Texas seed 22.81% of protein 



\\ hen grown in Kansas in 1908 from Kansas seed 14.70% of protein 



When grown in Kansas in 1908 from Texas seed 14.77% of protein 



When grown in California, 1906, from Kansas seed 10.38% of protein 



When grown in California, 1907, from Kansas seed 11.00% of protein 



When grown in California, 1907, from California seed.. 11.33% of protein 



When grown in California, 1907, from Texas seed 11.37% of protein 



When grown in California, 1908, from Kansas seed 11.52% of protein 



When grown in California, 1908, from California seed.. 11. 75% of protein 

 When grown in California, 1908, from Texas seed 12.44% of protein 



When grown in California, 1909, from Kansas seed 12.11% of protein 



When grown in California, 1909, from Califorina seed. . .13.27% of protein 

 When grown in California, 1909, from California seed 



By comparing the results in Kansas and California and remem- 

 bering that the seed used in any one year was that produced in 

 the year preceding, it will be seen that the composition of the 

 seed used seemed to affect the resulting crop not at all ; that seed 

 rich or poor in protein when planted in Kansas produced, in any 

 one season, grain of equal quality, but always richer than when 

 the same seed was i)lanted in California. 



Also, it will be noticed that there was a variation in the com- 

 position in a given place, upon the same soil in different seasons. 



The variation in Kansas was from 16.22 to 22 per cent., while 

 in California the range was from 10.38 to 13.27 per cent. 



