438 



EXPEEIMENT STATION EECORD. 



or red clover had a higher protein content than that grown without these 

 legumes. Oats grown with peas also showed an increased protein content and 

 the hay yield of mi.xed oats and peas was 4,375 lbs. as compared with 3,325 lbs. 

 of oats grown alone. 



Soil that had produced alfalfa for 5 years was higher in nitrate content than 

 soil which had grown timothy during that period, and portions of the same 

 plats kept bare of vegetation during the summer showed similar results. 

 Ammonium sulphate was more rapidly nitrified in alfalfa soil than in timothy 

 soil, indicating, in the opinion of the author, an influence of the plant on condi- 

 tions favoring nitrification. The increased protein content of nonlegumes when 

 grown with legumes is also attributed to this cause. Limed soil produced 

 alfalfa containing a higher protein content than unlimed soil, and the weed 

 Erigcron annuus grown on limed soil had a higher protein content when it was 

 grown with alfalfa also. 



The method used in making studies of the nitrifying power of soils is de- 

 scribed. The results upon which the author bases his conclusions as to the 

 relative protein content of nonlegumes when grown with and without legumes 

 are summarized in the following table: 



Relative protein content of eertain nonlegumes grown with and icithout legumes. 



a A later cut of timothy. 



b Sampled when ready to cut for hay. 



c Sampled in the field when ripe; not grown on the experiment station farm. 



Grimm alfalfa and its utilization in the Northwest, C. J. Brand (U. 8. 

 Dept. Agr., Bur. Plant Indus. Bui. 209, pp. 66, pis. 2). — A statement of the 

 history and a description of Grimm alfalfa are followed by tables presenting 

 meteorological data for Wertheim, Germany, from which locality it is supposed 

 to have been imported, and various other localities in which it has been 

 grown. Other tables present meteorological data for the periods and localities 

 of the tests reported by the author. The following table briefly summarizes 

 results obtained in some of these tests, made at the Minnesota Station : 



Summary of tcinter resistance tests of alfalfa at St. Anthony Park, Minnesota. 



