EXPERIMEJvTT STATION REPORTS. 



311 



it was compared were grown under the same soil and cultural conditions 

 and accurate records of the yields were secured. 



The following table gives a summary of the results secured : 



State 



Southern Michigan 



Iowa 



Indiana 



Ohio 



Illinois 



Pennsylvania 



No. of Records 

 Secured 



11 

 6 

 21 

 69 

 61 

 65 



Average increased yields 



per acre secured by 

 Michigan Certified Seed 



40 



61.2 



63 



42.8 



44 



68 5 



In order to test the yield qualities of the various lots of potatoes 

 planted for inspection, 131 strains of Kusset Rurals and Green Moun- 

 tains were secured from growers who applied for the inspection work 

 and were planted in a demonstration plot. The yields varied from 368 

 bushels per acre for the best strain to 108 bushels per acre for the lowest 

 yielding strain. Work with these strains is being continued in 1922. 

 Two hundred and forty other strains of potatoes have been planted 

 this year in a similar test, the data on this test, however, are not yet 

 tabulated. 



A variety test demonstration consisting of 29 varieties planted at the 

 Michigan Agricultural College showed that the Russet Rural or Late 

 Petoskey was the best late variety and that the Irish Cobbler was the 

 best early variety. 



The following is a statistical summary of the work done between July 

 1, 1921 and November 30th, 1922 : 



Total number of demonstrations 47 



Farm visits made 641 



Meetings Held at Demonstrations 41 



Attendance at such meetings 674 



Lecture Meetings 62 



Attendance at Lectures 3,713 



REPORT OF EXTENSION WORK ON UPLAND SOILS 



BY GEO. GRANTHAM 



The Extension Work in Soils is divided into two divisions, namely, 

 first, the work done in the field during the growing seasons which 

 includes field demonstrations and field meetings on the same and, sec- 

 ond, the extension schools held during the winter months of January, 

 February and March. 



The extension schools are given over largely to discussions of those 



