THE EXPERIMENT IN NORTH DAKOTA. 35 



|)roper stage for harvest in^j in the f^jroups criven below, those maturing 

 earhest being given first: 



Groii}) I. — Missouri ; Tennessee. 



Group II.— IlHnois; Iowa ; Wisconsin ; Oregon; Pennsylvania; 



eastern Ohio. 

 Group III.— Kentucky; western Ohio; southern Indiana; 



Courland; Nebraska; Micliigan. 

 Group IV. — Northern Indiana; commercial samples 1, 8, and 



9; Kief. 

 Group V. — Mogileff . 

 Group VI.— Orel. 



COMPARISON OK YIELDS OF FIELD-CITRED HAY. 



The lowest yield of the domestic varieties was 3,640 pounds, pro- 

 duced by the Tennessee seed, while the highest was 4,,S00 pounds, 

 produced by the seed from eastern Ohio and southern Indiana. No. 

 18, from Courland, gave the lowest yield of the Russian sorts, 3,780 

 pounds, while No. 16, from Orel, gave the largest return of any variety 

 "in the test, 5,320 pounds. No. 16 was harvested on June 30, when it 

 w^as still very immature, having but few blossoms. Inasnuich as 

 increase in substance is progressing most rapidly in the period lead- 

 ing up to and just preceding full maturity, it is very probable that 

 the Orel clover would have given a considerably higher yield had it 

 been allowed to mature properly. Judging from the performance of 

 this variety at other stations it should have been cut fnmi ten to 

 twelve days later than was the case. This fact should be borne in 

 mind when noting that No. 16 yielded only 520 pounds more than its 

 nearest competitor, 1,176 pounds more than the average for all plats, 

 and 1,600 pounds more than the poorest strains. 



THE EXPERIMENT IN NORTH DAKOTA. 



LOCATION, SOIL, AND DRAINAGE. 



The experiment in North Dakota was conducted on the Experiment 

 Station farm, near Fargo, in cooperation with Prof. J. H. Shepperd, 

 who has been assisted by Mr. O. O. Churchill. 



On account of the fact that a larger area was not available, the test 

 was made on half-acre plats. With one or two exceptions the same 

 series of varieties was used as in Nebraska, South Dakota, and Min- 

 nesota. 



The field used has a wonderfully uniform soil, consisting of jet 

 black clay loam several feet in depth. It is rich in organic matter 

 and in lime, both in the form of carbonate and sulphate. The sub- 

 soil is a silty clay of grayish-brown color, which extends to a depth of 



95 



