156 
THE TROPICAL AGRICULTURIST [Sept. r, 1893 
Lime... 
1-689 
Magnesia 
... 
•919 
Phosphoric acid 
... 
Sulphuric acid 
•261 
Caroonic acid 
•99o 
Chlorine 
•082 
Silica and Paslules 
of Quartz ... 
.641 
Oxide of Iron ... 
•100 
7-600 
The followinff are percentage results calculated 
from Mr. Hughes' analyses showing the com- 
position of the Ash of Ceylon Coffee Leaves, 
Coffee Pulp and Coffee Parchment:— 
Ash Analyses. 
Potash 
Soda 
Lime 
Magnesia 
Ferric oxide ... 
Mflgnefcic oxide of Man- 
ganese 
Alumina 
Silica 
Carbon dioxide 
Piiasplioric acid 
S.ilpliuric acid 
Chlorine 
Coffee 
Leaves. 
27-34 
6-36 
22-23 
12-09 
1-32 
8-43 
1309 
4-63 
3-43 
1-08 
Coffee 
Pulp. 
47 76 
1- 69 
10-06 
2- 02 
1-59 
3- 93 
22-40 
4- 59 
3 -.39 
2-57 
100-00 100 00 
"offee in 
Parch- 
inent. 
40-88 
1- 97 
5 85 
6-64 
2- 88 
2-85 
27-89 
7-88 
2-31 
85 
100-00 
The a,bcve .analyses of the ash of Ceylon 
coffee leaves and coffee pulj) differ widely in 
Somo respects from tiie corresjxmding analysis 
of Brazilian coffee. Ceylon aslie.s are riclier in 
potashes but not so rich in pliosphoric acid. 
The following is Mr. John Hughes" estimate 
of the constituents removed jicr acre by an 
average crop of coffet, assuniing 7 cwt.s. of 
parchujent from 1,200 trees-; — 
EstiituUe. 
Seetl. 
Pulp. 
Leaf 
Total. 
-.^ 
— 
if - 
■^^ee (1 
- Oi 
-3 ^ 
» 00 
,K II 
rtially dried 
0,000 leiives 
=247 lbs. 
.F^ 00 
a> X 
II 
Water 
•Organic matter 
Mineral (Ash) matter 
104 3 
653-8 
25-9 
664-8 
168-7 
15 5 
240 
2' 4 2 
18-8 
793- 1 
10-26-7 
60-2 
lbs... 
784 0 
849 0 
•247 <» 
1880- J 
• Containing nitrogen . . . 
11-5 
2 8 
66 
20-9 
The Ash consists of: — 
Potash 
Soda 
Lime 
Magnesia 
Phosphoric acid 
Sulphuric acid 
Chlorine 
Oxides of iron 
Silica 
C«vrL>oaic acid 
10-6 
•5 
1^5 
1^7 
2 1 
•6 
•2 
•7 
-7 
7-3 
7-5 
•3 
1-5 
3 
■7 
•5 
•4 
2 
6 
3-5 
52 
1- 2 
4-2 
2- 3 
9 
-6 
-2 
•2 
1- 6 
2- 4 
23 3 
2- 0 
7 2 
4-3 
3- 7 
1-7 
-8 
1-1 
29 
13-2 
lbs .. 
25-9 
155 
18-8 
60-2 
Manuring of Coffee. 
The following tables show the quantities of 
manures re^iuired to return to tiie .noil, the im- 
portant elements of plant food removed by the 
coffee crop, basing the calculation* on the pre- 
ceding estimate by Mr. Huglies. Seven cwts. of 
parchment coffee is no doubt much above the 
average crop, but for manuring purposes it is a 
safe basin to go up(m. 
The tlicoretical doses of nitrogen, phosphoric 
and potash require*! t-o return to the soil, the 
amounts of these important ingredients removeil 
by the coffee crop in two yearn, i.c , 14 cwts, of 
parchment coffee with accompanying pulp and 
loss of leaf; but not of prnnings, are, 
Nitrogen ... ... 4r8 lbs. 
Phosphoric acid ... 7-4 ,, 
Potash ... ... 46-6 
The staple manures for coffee are cattle manure 
castor cake and bone dust, to which are some 
times added salts of potash . 
The following tables are drawn out on the 
same principle as those already given in con- 
nection with the manuring of tea. The nitrogen 
table gives the weight of manures which contain 
the theoretical dose of nitrogen, viz., 41-8 lbs. 
The phosphoric acid table gives the weight of 
the manures which contain the theoretical dose 
of phosphoric acid, viz., 7-4 lbs. The potash table 
gives the weights of manures which contain the 
theoretical dose of potash, viz., 4G"6 lbs. 
Nitrogen Table. 
Tliis table gives the weights of certain manures 
which will return to the soil nitrogen equal in 
amount to that removed from the soil by two 
years' crops, including pulp and leaves, viz., 41-811^8. 
nitrogen together with the weights of phosphoric 
acid and potash in the manures: — 
Description of Manure. 
Cej-lon Cattle JNIauure No. 1 . 
Do do No. 2 
Castor-Cake (best) ... 
Do (lower quality). 
Bone dust ... 
00 
- 
hoi 
tl 
.S 
5 
r.S 
- -• T ~ 7- - 
5-£2^=:=l ---- 
X 
St 
Si 
"W 
■3 
9,.372 
•23-4 
89-1 
6,490 
6-0 
69-3 
597 
17-3 
I'-i 
836 
12-5 
12 5 
1,194 
275 0 
11-9 
Phosphoric Acid Table. 
This table gives the weights of certain manures 
■which will return to the soil plio~phoiic acid eq-aal 
in amount to that removed from the soil by two 
j-ears' crops, including pulj' and leaves, viz., 7 "4 lbs. 
phosphoric acid together with the weights of 
nitrogen and of potajh in the manures : — 
