Eradication of Bindweed. 209 



also distributed by means of manure, and 

 in cultivated land it is propagated very 

 largely by means of the root-stocks which 

 it so numerously possesses. 



Modes of Eradication. 



The following are the modes of eradica- 

 tion that have been found most successful 

 in dealing with bindweed : 



1. Modifying the rotation. In the 

 infested fields drop grain crops out of the 

 rotation until the fields have been subjected 

 to a cleaning process. 



2. After-harvest and autumn cultivation, 

 followed by spring cultivation and a cul- 

 tivated crop. Plow the infested fields 

 immediately after harvest, and cultivate or 

 plow them sufficiently often thereafter to 

 keep the plants from breathing until the 

 period of growth ceases. The plowing 

 should be shallow, but at the same time 

 thorough. The last plowing, however, 

 should be deep, to prepare the soil for the 

 next crop. In the spring proceed in the 

 same way as in the autumn cultivation ; that 

 is, keep constantly stirring the soil near the 

 surface until it is time to plant a cultivated 

 crop, as corn or roots. Then give this 



