744 Popular Editions of Station Bulletins of the 



very badly contaminated with weed seeds and inert matter. The 

 so-called lawn mixtures are about as bad, though only two samples 

 were examined. The crop seeds were of poor quality, while seeds 

 of 14 bad lawn weeds were found in considerable quantities. Farmers 

 should avoid such mixtures, as it is far more satisfactory to buy 

 the pure seed and mix them as desired. 



No specially new or threatening weeds were brought 



Impurities to attention by these examinations, though each 



found. year adds many of minor importance to the list of 



impurities found. Among the dangerous ones 

 commonly found are dodder, mustard, buckhorn, chicory, green 

 foxtail grass, curled dock and trefoil. Russian thistle and roquette 

 seeds were found in many samples, but the experience of the year 

 gives no evidence that they are obtaining any foothold in New 

 York fields, since cultural conditions prevent their spread or con- 

 tinuous growth. Some Johnson grass seeds were found and some 

 inquiries were received regarding it; but it is evidently not yet 

 established in our alfalfa fields. 



The following table gives a complete list of the foreign seeds 

 or seed impurities found in samples analyzed, with the number 

 and kind of samples in which they were found. 



Table I. — Foreign Seeds Found in Seed Samples and the Number and Kind 

 of Samples in Which They Occurred. 



