[Hop Cultivation. 
235 
ments upon liop plants, which showed that very large quantities 
of mineral matter are required for a crop of hops. Of these, as 
Mr. Nesbit points out, the most important are silica, phosphoric 
acid, lime, potash, phosphate of iron, and magnesia. His con- 
clusion is that : — 
As the produce of a hop crop is almost wholly exported from the farm, 
it must he evident that uuless the mineral matter is replaced, the richest soil 
would eventually he impoverished hy the growth of this plant. This un- 
doubtedly is the cause of the necessity for manuring this plant so highly. 
Professor Brazier, who occupied the chair of Chemistry at 
Marischal College, Aberdeen, made analyses of the bines, leaves, 
and cones of Kent Goldings and Sussex hops, in 1880, with the 
following results : — 
The Bine yielded 5-57 per cent, of ash. 
The Leaves „ 23 - 45 „ „ 
The Cones „ 8 - 38 „ „ 
The ashes of these gave the following percentages : — 
I. — Kent Goldings. 
— 
Bine 
Leaves 
Flowers 
Chloride of sodium 
5 - 75 
2-08 
2-31 
Chloride of potassium 
• 
4’25 
7 00 
1-90 
Potash 
16-79 
2-36 
25"53 
Lime 
43-66 
64-63 
21-73 
Magnesia 
10-12 
716 
7-14 
Oxide of iron . . . 
1-04 
0-86 
1-81 
Phosphoric acid . . 
11-26 
4-24 
18-16 
Sulphuric acid . . . 
2-61 
3-51 
5-31 
Silica 
4-52 
1816 
1611 
10000 
10000 
10000 
II.— 
Sussex Grape Hops. 
— 
Bine 
Leaves 
Flowers 
Chloride of sodium 
5-07 
4-79 
3 08 
Soda 
200 
0-20 
— 
Chloride of potassium 
— 
— 
0-34 
Potash 
31-66 
12-95 
38-26 
Lime 
3o'46 
44-97 
15-10 
Magnesia 
6-59 
7-60 
6-49 
Oxide of iron . . . 
0-82 
0-81 
1-51 
Phosphoric acid . . 
10-10 
6-86 
18-71 
Sulphuric acid . . , 
2 5 5 
309 
3-67 
Silica 
5'75 
19-73 
12-84 
10000 
10000 
10000 
