10. 



introduced with clover seed. In some cases it is difficult to 

 separate the weed seeds from clover seed as dock, buckhorn and 

 bracted plantain. In other cases there is no excuse for the pres- 

 ence of these weed seeds. One can nearly always tell where the 

 seed comes from because of the presence of certain weed seeds. 



It may be of interest to give a few statistics on the weed seeds 

 commonly found in some of our agricultural seeds. 



The more important impurities found in red clover vary with 

 the season. The imported seed may contain Canada thistle, 

 dodder, buckhorn, evening catchfly, wild carrot. Iowa grown 

 clover seed usually contains none of the above, but ragweed, dock, 

 smartweed, plantain, dropseed grass, foxtail and sheep sorrel are 

 common. Western grown alfalfa may contain black medick, burr 

 clover, chicory. The seed of sheep sorrel, yellow foxtail and 

 curled dock may also occur. Baehellor's button seed as well as 

 that of evening catchfly indicates European grown seed. Tim- 

 othy seed generally contains peppergrass, curled dock, common 

 plaintain. The seed of oats may contain quackgrass and mus- 

 tard. Wheat seed contains the seed of vetch, corncockle, chess, 

 cowherb and mustard. 



IOWA PURE SEED LAW. 



Seed Legislation. The Iowa law has the following provisions 

 in regard to the sale of seed: 



Sec. 9. The term, agricultural seeds, as used in this act, shall 

 include the seeds of the red clover, white clover, alsike clover, 

 alfalfa, Kentucky blue grass, timothy, brome grass, orchard 

 grass, red top, meadow fescue, oat grass, rye grass and other 

 grasses and forage plants, flax, rape and cereals. 



Section. 10. No person shall sell, offer, or expose for sale or 

 distribution, in this state, for the purpose of seeding, any of 

 the agricultural seeds as defined in Section Nine (9 of this act, 

 unless the said seeds are free from the seeds of the following 

 weeds: Wild mustard or charlock (Brassica sinapistrum), quack 

 grass (Agropyron repens), Canada thistle (Cnicus arvensis), 

 wild oats (Avena fatua), clover and alfalfa dodder (Cuscuta 



