450 
THE TROPICAL AGRICULTURIST. [Jan. i, 1894. 
No. .3 
per cent. 
latrine refuse after being incinerated with coconut 
fibre waste, wood and leaves : — 
Moisture 
Organic and Volatile matter 
Biphospliate of Lime 
Equal to Bonesphospate rendered soluble 
Insoluble Pliosphate of Lime 
Calcium Sulphate 
Potassium Sulphate 
Potassium Chloride 
Magnesium Chloride 
Sodium Chloride 
Oxide of Iron and Alumina ... 
Insoluble Siliceous matter ... 
Containing 
Nitrogen 
Equal to Ammonia 
Phosplioric acid-Tribasic Phosphate of 
Lime ... 
Total Potash 
15-42 
42-24 
2- 12 
(3-32) 
5-92 
14-20 
3- 92 
914 
1-26 
1-52 
•43 
3-83 
100 00 
1- 87 
2- 27 
9-24 
7-89 
Moisture 
* Organic matter ... 
Oxide of Iron and Alumina 
Lime 
Magnesia 
Potash 
Soda ... 
Sodium Chloride .. 
t Phosphoric Acid 
Carbonic Acid and Sulphuric Acid 
Insoluble Sileceous matter ... 
Containing 
Nitrogen 
Equal to Ammonia 
Equal to Tribasic Phosphate of Lime 
No. 4 
per cent. 
7-80 
24-20 
6-70 
4-96 
1-65 
1- 80 
•93 
-62 
2- 64 
2-60 
46 10 
100-00 
1-05 
1-25 
5-76 
Moisture 
Organic Matter 
Oxide of Iron and 
Alumina 
Lime 
Magnesia 
Potash 
Sodium Chloride 
Sulphuric Acid, Car 
bonic Acid, &c. .. 
• Phosphoric Acid 
Insoluble matter 
Containing Nitrogen 
Equal to Ammonia 
Equal to Tribasic 
Phosphate of Lime... 
No. 5 
No. 6 
No. 7. 
aer cent. 
ler cent. 
Der cent. 
66-89 
15-00 
6-6 
22-559 
8^50 
12-6 
1-007 
7^03 
8-61 
•056 
4^61 
6-57 
•067 
-88 
1-72 
•057 
•60 
•006 
I ,41 
1 5-00 
•045 
J 
•169 
2-57 
1-71 
9^144 
59-40 
57-19 
100-000 
100-00 
100-00 
1-54 
•48 
•169 
1-87 
•58 
•206 
•369 
5-61 
3 733 
Moisture 
Cai bon, organic matter and combine<) water 
Oxide of Iron and Alumina 
Lime 
Magnesia 
Potash 
.Sodium Chloride 
I'liosphoric Acid 
Sulphuric Acid 
Camonic Acid 
Siliceou>< matter 
per cent. 
14'50 
6-96 
2-63 
.-.0 
-98 
44 
1-02 
-48 
32-54 
100-00 
2 2.3 
* Equal to Triba.sic Phosphate of Lime 
All of theKC compost manures might be applie<l 
with advantage to land in the vicinity of the 
places where the manure wajs proiluoed ; but 
none of them unless perhaps No. 3 contains the 
elements of plant food in a sufficiently concentrate*! 
form to repay the cultivator for the cost of their 
transit to a distant entate. 
The manures of commerce may lie divided into the 
following classes :— 1st, uitrogenou.^ manures ; 2nd, 
phosphoric acid manures ; 3rd, potash manures ; 
4th, nitrogen, and pho.sphoric acid manures : 5th, 
nitrogen and potassic manures ; 6th, phosphoric 
acid and potash manures ; 7th, what might l>e 
called general or concentrated compost manures ; 
8th, indirect manures. 
1st. Nitrogenous Manures. 
Nitrogenous manures as the name indicates, are 
those which are valued mainly for the nitrogen 
they contain. Some of these contain the nitrogen 
in a form readily .«olul)le in water. Such are the 
salts ammonium sulphate and sodium nitrate. In 
others tlie nitrogen sxists in a more or less in- 
soluble form. We have examples in dried Hesb, 
dried blood, the various oil cakes, woollen waste 
and rags, hair, horn and leather waste. 
A m mon iu m Sulphate. 
The commercial salt contains 20 per cent of 
nitrogen. It is usually guaranteed to contain 24 
per cent of ammonia or to consist of 93 18 
per cent of real ammonium 
loUowin" is the analysis of 
imported into Ceylon : — 
Water expelled at 212' F. ... 1-50 
* Ammonium Sulphate ... 95-50 
Volatile impurities ... ... 2-74 
Fixed do . . ... -26 
sulphate. The 
a good sample 
100-00 
24-60 
is liable to contain 
of ammonium sulphocyanate, 
a more nitrogenous substance 
The following is the analysis of Colombo 
• Containing ammonia 
Ammonium sulphate 
small quantities 
which, although 
than the pure sulphate of ammonium, is poison 
ous to plants. 
Sodium Nitrate. 
When of standard purity this salt contains 95 
per cent real nitrate of sodium ; the remaining 
5 per cent is chiefly made up of water and com- 
mon salt. It is obtained from the Pampas of 
Peru, where it occurs in the form of a crude 
nitrate, containing from 35 to 75 per cent real 
nitrate, and called caliche. It is in the purified 
form that it is exported. The amount of nitrogen 
present in nitn^te of sodium of standard quality is 
15-65 per cent, which is the equivalent of 19 per 
cent of ammonia. 
