34 



WEEDS OF THE FARM AND GARDEN 



6.0; sheep sorrel, 34.4; dock, 44.0, and others. Of the 

 unweighted samples 63.8 per cent contained foxtail, 57.1 

 per cent timothy, 51 per cent curled dock, 47.8 per cent 

 green foxtail, 38.6 per cent rib plantain, buckhorn, or 

 ribgrass; 28.5 per cent sheep sorrel, and 11.9 per cent 

 Canada thistle. Of the two hundred and fifty-five 

 samples examined timothy was found in 162, sand and 

 dirt 138, yellow foxtail 135, green foxtail 128, curled 

 dock no, sheep sorrel 86, bracted plantain 38, 



evening cockle 22, 

 Canada thistle 24 and 

 dodder 10. It will be 

 seen from the above 

 partial list that many 

 bad weed seeds are 

 found in clover seed. 

 We found, further, that 

 clover seed in some in- 

 Fig.27. Some impurities in red clover stances showed a very 



seed, i, wild carrot; 2, buckhorn, two 

 views; 3, Canada thistle; 4, clover 

 dodder; 5, green foxtail, two views; 

 6, curled dock; 7, bracted plantain. 

 (C. M. King.) 



low vitality. Only four 

 of the samples showed 

 a vitality of 99 per 

 cent and over. There 

 was a considerable number below 80 per cent and 

 twenty-one samples above. 



Impurities of White Clover Seed. The more common 

 impurities are sorrel mayweed, lamb's quarter, the plan- 

 tains, dooryard knotgrass, night-blooming catchfly, five- 

 finger and chickweed. 



The following illustration is given of samples exam- 

 ined in Iowa: 



The impurities found in weighed samples of white 

 clover were sheep sorrel, 44.4 per cent; plantain, 33.3; 

 bracted plantain, n.i; lamb's quarter, n.i. Of these 

 the sheep sorrel, dock and plantain are bad weeds. In 

 the unweighed samples sheep sorrel occurred in 80 per 



