CULTIVATION. 



213 



At picking time the strings are cut off at the upper end, 

 and the head wires are lowered in the spring for clearing 

 them of the remnants. 



The impossibility of working the ground by horse 

 labour in the alleys containing the posts is a drawback to 

 this system. The cost of erection is about 4d. to 5d. per plant. 



Perin constructed a frame on which the hops are trained 

 vertically at first and then spread over a roof of wire netting, 

 but this system is not storm-proof and has several other 



■» 



• 



— « 



► ■*. 



t 



4 



s 



Fig. 55. — Ground-plan of garden trained on the Soipio and Herth system. 



defects, the lines having to be cut before the cones can be 

 picked off. Besides, light and warmth can only gain access 

 on one side. 



The best storm-proof frames are those of Schwend and 

 Heijak, both of which are for vertical training, though 

 they can be modified for training on the slope without 

 any particular difficulty. Their great defect, however, 

 is the high cost of installation, and on this account they 

 have met with but little favour, despite their undeniable 

 advantages. 



