172 HOPS. 



the liquid portion, contains a great deal of nitrogen, which 

 is readily convertible into nitric acid, and is consequently 

 very rapid and energetic in its action. Now the presence 

 of an excess of active nitrogen induces an immoderate 

 luxuriance of foliage, but damages the crop, frequently in 

 a quantitative sense and almost invariably in point of 

 quality. Plants that put forward an abundance of leaves 

 sometimes produce only a very few cones, and these are 

 loose, lumpy, frequently infoliated, and poor in lupulin 

 granules, besides having a great tendency to smell of 

 garlic. Consequently, in determining the quantity of stall 

 manure to use for hops it will be necessary to make ex- 

 periments and not exceed the maximum ascertained as 

 most suitable ; since otherwise, apart from the possibility 

 of a diminished crop, the inferior quality of cones likely to 

 result will be difficult of sale — perhaps altogether unmarket- 

 able should the season be one in which good quality hops 

 are plentiful. 



This applies not only to stall manure and liquid manure, 

 but also to all active nitrogenous fertilisers, such as dried 

 blood, sulphate of ammonia, and especially nitrate of soda. 



Under certain circumstances, however, the energetic 

 action of the said nitrogenous manures is exceedingly valu- 

 able to the hop-grower; For instance, when hops have 

 been damaged by night frosts, drought, wind or hailstorms, 



lime, the following quantities of manure will be necessary to fully replace the 

 several constituents removed from the soil by each hop plant : — 



6,440 grams of stall manure correspond to 32-20 grams N. 

 3,742 „ „ „ 9-73 „ PA- 



3,746 „ „ „ 23-60 „ jif). 



7,230 „ „ „ 50-61 „ CaO. 



Hence 2,727 plants per acre will require, to fully replace 



the nitrogen, say, in round numbers, 38,600 lb. of manure, 



the phosphoric aoid, ,, 22,400 ,, 



the potash, „ 22,500 



the lime, „ 43,400 



