AGRICULTURE 



before the silks show, and keep it there, no grains will 

 form on that cob. This is because no pollen falls on the 

 silks, which are the pistils of an ear of corn. For the 

 same reason, if you cut the young silks from one side of 

 an ear shoot, no grains will grow on that side. Every silk 

 is connected with a grain space on the cob, and if that silk 



FIG. 13. SOUND AND GOOD TO- 

 BACCO SEED WHERE THERE WAS 

 AN ABUNDANCE OP POLLEN 

 APPLIED 



FIG. 14. CHAFF, INSTEAD OP 

 TOBACCO SEED, WHERE NO 

 POLLEN WAS ALLOWED TO 



REACH THE STIGMA 



catches no pollen, a vacant grain space is left on the cob 

 where this silk arises. 



Pollen does not cause fruit or seed to grow or be pro- 

 duced unless the plant that bore it is of the same kind 

 as, or closely related to, the plant on whose pistil it is placed. 

 Thus peach pollen is useless on apple blossoms. The pol- 

 len may come from the same flower of which the pistil is 

 a part, from another flower of the same plant, or from a 

 different plant. 



