TIMOTHY 143 



130. Proportion of roots to tops. Several investi- 

 gators have secured data on the relative amount of roots 

 in timothy, from which it appears that the roots do not 

 weigh more than half as much as the tops. 



At the Storrs, Connecticut, Experiment Station, Woods 

 determined the dry weight of roots in an area 2 feet 

 square for each 6 inches in depth. From these data the 

 weight to the acre for each 6 inches was calculated as fol- 

 lows in pounds : 2170, 274, 58, 14 or a total of 2516 pounds. 

 The dry weight of the tops similarly calculated was 5027 

 pounds. 



At the Utah Experiment Station the dry weight of 

 timothy roots was determined in an area 2 feet square 

 for each inch of depth. On this basis the weight of roots 

 per acre was for each inch of depth as follows, the weights 

 being given in pounds: 541.7; 279.8; 116.9; 103.9; 

 86.8; 38.4; 24.0; 26.9; 29.9; 24.0; 16.6; 12.0. The 

 total acre weight in the 12 inches was 1303.9 pounds. 



At the Arkansas Experiment Station Bennett and Irby 

 determined the weight of roots to tops to be as 83 : 100. 

 Fifty per cent of the roots were in the top 4 inches, 95 

 per cent in the top 6 inches and practically none ex- 

 tended deeper than 12 inches. 



131. Regional strains. In Switzerland, Stebler and 

 Volkart report a number of investigations to determine 

 the relative yielding capacity of seeds from different sources. 

 In one small plot test lasting four years the average yield 

 of timothy from Saxony was 25 per cent greater than that 

 from America. The American timothy showed a much 

 greater reduction of yield after the first two years. In 

 both cases the timothy was mixed with the same per cent 

 of red clover. 



In another test of 5 years, the average yields of 4 



