352 



CONTROL OF WEEDS 



wood and buds ready for winter. Weeds and grasses will appear in 

 the orchard soon after tillage stops. Crab grass is often very per- 

 sistent and will spring up quickly after cultivation ceases (Fig. 248). 

 If the owner does not sow a cover crop at this time weeds will, to 



Fig. 251. — Golden rod is often abundant along fences, roads, and in pastures. It is a 

 perennial weed easily controlled by rotation of crops. 



some extent, form a natural cover crop. The growth of the weeds 

 will fulfill a number of the benefits of the cover crop which the 

 owner should have sown. However, most of them do not persist 

 through the winter, as a winter crop should do. Weeds which 

 start in midsummer are likely to prcve to be annuals which are 



