LUTHER BURBANK 



is only by careful screening that the other seeds 

 can be removed. With seeds of hoed crops, such 

 a condition does not exist. 



It is impossible, of course, to give here a 

 complete description of all the different kinds of 

 weed seeds, but pictures are given in the natural 

 color of some of the most common ones. By com- 

 paring the seeds with these pictures it will usually 

 be possible to determine the kind of seeds that 

 are found in your locality. 



Of course, one must always expect to find a 

 few foreign seeds in a sample of grain, but remem- 

 ber that the weed seeds cost the same price per 

 bushel as the oats. That is, if the price is $2.00 a 

 bushel for oats, you pay $2.00 a bushel for the 

 weed seeds which are not only worthless but a 

 detriment to the crop. 



In orchards, especially in California, the two 

 worst weeds are wild morning-glory and a new 

 species of perennial amaranthus. 



Both of these produce many long and persist- 

 ently sprouting roots. The morning-glory sends 

 its roots to great depths and has taken possession 

 of many acres of the best land. This, of course, 

 greatly reduces the production of crops and the 

 value of the land. 



The overrunning of a field is due to the fact 

 that the owner of the land was careless in not 



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