478 RETURN OF MATERIAL TO THE Hop Root. 

1 cwt. of sulphate of ammonia, 2 cwt. of kainit, and 3 cwt. of 
superphosphate, this quantity of manure would by no means 
be so efficacious as the material which is in the plnat and 
wholly ready for use when wanted. Atthe same time these 
materials are doubtless accompanied by a considerable amount 
of carbohydrate reserve, withdrawn from the leaves and bine 
in a similar way. It is difficult to estimate this migration, 
as the carbohydrate reserve in the green bine does not 
appear to be in a form that admits of ready estimation. 
Diagram showing Source and Ultimate Destination of Nutrient 
Materials of the Hop Plant. 
L8s LBS 
PER| NITROGEN | LIME Potasn |PHOSPHORIC! FP3 
ACRE ACID ACR 


50 50 Ibs 
40 40 
30 30 
20 20 
10 d i 
Z j = 10 
Yala YE 20 
K es y} = 
Ni] Qe 30 
N Uj = 
We 40 
| 
A= 50 
YA = 
NE 
N = 
N 5 90 

IN HOPS YU [vce = 
IN LEAF IN BINE INDEAD ES 
| SOLD N BINE&c. ES 
The losses that arise in a practical way from the practice 

of cutting the bine grown upon poles is clear from the results 
obtained in the garden at Wye, where one section was in 
poles in 1897 and 1898, and was changed to pole and string 
work in 1899 and 1900. Thus the bine was cut at harvest 
