FIELD AND GARDEN PRODUCTS 



Impurities. The chief impurities in timothy are buck horn, 

 Rugel's plantain, curled dock, and in some samples pepper grass. 

 The vitality tests of plump seed show germination lower than the 

 standard. The percentage for plump seeds was 64, for shrunken 

 seeds 27.7. One authority gives the percentage of impurities in 

 sixteen samples of American grown seed at 7.25. The principal im- 

 purities found in timothy seed consist of pepper grass, dog fennel, 

 black-eyed Susan, green foxtail, sour dock, field sorrel, rough cinque- 

 foil, buckhorn, narrow-leaved plantain, rib-grass, common plaintain, 

 red top and blue grass. The most common impurities found in seed 

 offered for sale in Iowa will be found in the following table : 



JMPURITIES IN 6 SAMPLES TIMOTHY. IOWA. PERCENTAGES BY WEIGHT. 



Average percentage 7.356. Excluding clovers 1.525. 



Vitality. The good timothy seed should have a vitality of 85 

 to 90 per cent. One authority records the average of American seed 

 tests to be 80.1 per cent. The following table indicates the condition 

 of the timothy seed : 



GERMINATION OF TIMOTHY SEED TESTED OCTOBER. 1906. 



