120 University of California Publications in Agricultural Sciences [Vol. 1 



RELATION OF INCREASING THE SEVERAL AVAILABLE PLANT 



FOODS IN THE SOIL TO THE PROTEIN CONTENT OF 



WHEATS AT THE UNIVERSITY FARM, 



DAVIS, 1908-12, INCLUSIVE 



The general effect upon the protein content of wheat from 

 increasing the available nitrogen and other plant food elements 

 in the soil at the University Farm at Davis has been made the 

 subject of study for the past four years and the results are 

 discussed below. In these experiments Little Club wheat has 

 been used each year. In order that any cumulative effect which 

 might accrue from the nitrogen and the other plant foods used 

 might be apparent, the seed from each plat was seeded back 

 upon the same plat each succeeding season. 



The original seed used in these experiments was grown in 

 1906, and had the following composition : 



As In dry 



analyzed matter 



Moisture 11.28 



Total protein 12.12 13.66 



Gliadin 4.38 4.93 



Glutenin 6.38 7.19 



Non-gluten proteids 1.36 1.58 



Ash 1.62 1.82 



Kernels in 10 grams .... 226 



Bushel weight 59 lbs. 



For the four years 1908. 1909. 1910. and 1912 the average 

 result was as stated in the table below. During the season of 

 1911 the land was under bare summer fallow on account of it* 

 foulness with wild oats, which accounts for the omission of that 

 year. 



During these trials the one-twentieth acre plats received the 

 indicated quantities of fertilizer each season. 



