1Mar., 1899.] QUEENSLAND AGRICULTURAL JOURNAL. 199 
ae substance shall have been discovered capable of taking the place of gutta- 
‘ee a, there is only one remedy, and that is the formation of nurseries for 
2 the growth of the tree on a systematic plan; these trees must be 
ae as game is treated if they are not to disappear from the face of the 
fee There is little doubt that Java, Borneo, and Sumatra would afford a 
ze urable ground for experimenting with the cultivation of this precious tree, 
se product has become so highly essential to the continued intercourse 
tween the nations of the world. 
ee oe en 
ry 
MANURING OF TROPICAL PLANTS—RICE. 
iff two varieties of this plant—viz., water rice and upland rice—require 
% meat soils and different climates. The first variety is more generally 
: Paces requires a moist, clay soil, that can stand the necessary watering. 
can ter soils should at least have a loamy, impermeable subsoil. Upland rice, 
mk a other hand, can be grown on 4 soil not quite so rich ; it stands dryness 
ch better, and thrives also in less warm climates. 
The following quantities of plant-food ingredients are removed from one 
Tity 
Acre 
Potash. Phosphoric Nitrogen. 
Acid. 
By an average crop of 2,676 lb. grains... 
” Rs 9,676 ,, straw... 28:1 lb. 16:3 1b. 262 lb. 
49 DH 446 ” chaff " 
By a good crop of 4,014 ,, grains toa)’ 
” x 4,460 ,, straw ; 45°7 lb. 24°9 lb. 39:2 lb. 
” 9 62-4: Ba chaff 3 
cry thorough investigations have been conducted by Prof. Kellner? and 
‘ a in Japan, as to the fertiliser requirements of water rice. In order to 
SeoLne the exhaustion of nitrogen, phosphoric acid, and potash in the soil, 
Haven uecr trial was inaugurated, in which each plot received the following 
tities of fertilisers to the acre :— 
Plot 1 No fertiliser. 
» 2 89 1b. phosphoric acid 89 Ib. potash — lb. nitrogen 
Oma ” ” ” 89 ,, ” 9, ” 
» 4 8) ,, ” ” ty ry) ” 89 ,, ” 
» Oo 89 ,, ” ” 89 ,, ” 89 ” ” 
. peittogen was applied in the form of sulphate of ammonia, phosphoric acid 
ts 4 form of double superphosphate, and potash in the form of carbonate. 
Plant 
Th 
Phe 
pl 
ae for the plants which 
Th 
ies 
Bas! Siven) were as follows} :— 
No fertiliser A ef 
Without nitrogen A 
Without phosphoric acid... 
Without potash ... = 
___ Complete fertiliser 
es, 
ee 
* Lierke. 
i 8 which had received a complete 
mal green colour; next came the plants to which no potash had been applied. 
plants to which no nitrogen had been given were of a light-green colour. 
Osphoric acid seems to have a very beneficial effect upon the growth of the 
had not received phosphoric acid differed but little 
ne the unfertilised plants; they were of a dark-greett colour, but very small. 
average yields from three check plots (the size of the plots is unfortunately 
evelopment of the plants corresponded to that of the previous years; the 
fertiliser grew best of all, showing a 
(Yields given in ounces.) 
praktische Diingetafeln, 
+ Imp. University of Agriculture 
+ “ Jahresbericht fiir Agriculturchemle, 
Straw. 
10°2 
16'8 
13:1 
222 
27-5 
Full grains. Empty grains. 
75 O1 
12°0 0:2 
9:5 0:2 
14°6 0-4: 
* 20'3 03 
Berlin, Parey. 
Komaba, Tokio, Japan, Bull. 11, &e. 
ie,” 1892, p. 250. 
Total. 
17°8 
29:0 
22°8 
37-2 
43°1 
