536 EXPERIMENT STATION RECORD. 



were applied in conjunction with kainit while in others no potash fer- 

 tilizer was used. The soil contained approximately 0.25 per cent of 

 potash. Some of the results obtained are as follows: 



Average increase in yield of grain per acre of fertilized over unfertilized plats of barley. 



Kainit, 535.26 lbs. per acre : Pounds. 



Hanna, average of 2 varieties 53. 52 



Chevalier, average of 4 varieties 405. 90 



Kainit, 535.26 lbs., sodium nitrate, 89.21 lbs. per acre: 



Hanna, average of 2 varieties 401. 44 



Chevalier, average of 4 varieties 142.73 



Kainit, 535.26 lbs., sodium nitrate 178.42 lbs. per acre: 



Hanna, average of 2 varieties 292. 60 



Chevalier, average of 4 varieties 33. 00 



It is shown by these and other experiments that kainit, when applied 

 with nitrogenous materials, not only increased the yield, but also 

 improved the grain, the starch content and weight of the grain, and 

 increased the percentage of mealy grains. Both applications of sodium 

 nitrate were found profitable. The protein content was not increased 

 and the quality of the grain was not impaired. 



Results obtained from applications of nitrate of soda. 



The plats fertilized with Peruvian guano yielded on an average 

 44 lbs. of grain and 308 lbs. of straw less than the plats which received 

 the nitrate of soda, but the grain from the guano plats was heavier 

 and contained less protein, more starch, a larger percentage of mealy 

 grains, and better kernels. Each application furnished 26.76 lbs. of 

 nitrogen per acre. Potash applied in conjunction with guano had no 

 influence either on the yield or quality of the grain. 



Variety tests (pp. 119-150). — Comparative tests were made with vari- 

 eties of wheat, rye, oats, barley, peas, fodder beets, and potatoes. The 

 preparation of the soil is described and the results obtained are given 

 in tables. 



Sixteen varieties of winter wheat, including 8 square head and 

 2 bearded varieties, were tested. One of the varieties classed with 

 the square head sorts, a cross between a square head variety and an 

 early maturing American variety, and known as Eimpau Bastard 

 wheat, produced the largest yield of grain and was, with Mold Red 

 Prolific, the earliest maturing variety in the experiment. The periods 



