372 



Misfsouri Agricultural Report. 



(lull brown iiiu 

 light sereeniiig.s 



iiiorc or U'ss shriveled. Empty ijerforated seed shells in 

 show the work of tlie clover seed ehalcis fly.'' No 



1, Side view and, 

 the triang-ular 



Fig. 22. — Seeds of red clover 

 2, edge view of seeds ; 3 

 form indicated ; 4, a seed cut lengthwise ; 5, 

 a seed cut crosswise, sliowing- tlae embryo ; 

 a, seed scar; b, steinlet (radicle) of the em- 

 bryo; V, seed leaves (cotyledons) of tlie 

 embryo ; 6, a pod of red clover ; 7, natural 

 size of seeds. 



evidence of the so-called clo- 

 ver seed midge is ever present 

 in seed. Note should he made 

 of the apparent relative quan- 

 tify of poor true clover seed 

 in the sample. 



Consider the matter of in- 

 tentional adulteration by the 

 use of ( 1 ) old red clover seed 

 which is sometimes disguised 

 by oiling and polishing, but 

 which will be disclosed in the 

 germination test; (2) yellow 

 trefoil seed (tigs. 3 and 23) ; 

 and (3) miscellaneous screenings, consisting of shriveled clover seed and 

 weed seeds, or of very small red clover seed indicating foreign production. 

 Separate all true red clover seed, together with yellow trefoil present 

 in quantity sufficient to indicate intentional adulteration, from all weed 

 seeds and other materials. 



If the sample is adulterated with trefoil or other specific adulterant, 

 count out 1,000 seeds 

 from the clover and 

 adulterant freed from 

 other impurities and 

 determine the quantity 

 of the adulterant by 

 count (p. 30). 



The total quantity of 

 true red clover seed, in- 

 cluding shriveled seed, 

 is the "pure seed" of 

 the test ; accurately record its weight. The percentage of true red clover 

 seed in the test sample and in the original sample is shown by dividing 

 this weight by the weight of the original sample, expressing the result in 

 per cent; or, if seed equal to the weight of 12yo BB shot is being tested, 

 each V:6-sbot weight represents one-half of 1 per cent of the whole. 

 Count indiscriminately from the pure seed 200 seeds in duplicate 

 for" the germination test. Conduct this test as previously directed under 



Fig. 23. — Seeds of yellow trefoil: :i, Seeds showing 

 variation in form and size ; b, natural size of 

 seeds ; c, oval form of trefoil seeds indicated ; cl, 

 a pod of trefoil. 



& See "Some Insects Affecting the Production of Red Clover Seed," Circular 63, 

 Bureau of Entomology, U. S. Dept. of Agriculture, 1906. 



