1 Jan., 1899.] QUEENSLAND AGRICULTURAL JOURNAL. 55 
larger than that produced by an average application of nitrogen in the form 
of nitrate of soda or sulphate of ammonia. On the other hand, the juice 
from cane fertilised with stable-manure did not contain much sugar, and was 
not well compounded. Potash and phosphoric acid alone produced but a small 
increase over the unfertilised and unlimed plot, while on the limed plot there 
was a larger increase, probably on account of the tendency of lime to promote 
the formation of nitrate. 
As nitrogen alone produced a considerable increase, the effect of the 
addition of potash and phosphoric acid was not very apparent; perhaps the 
application of a larger quantity of potash might have given better results. In 
the majority of cases, nitrogen in the form of sulphate of ammonia produced 
a more beneficial effect than the same amount of that ingredient in the form 
of nitrate of soda; while the application of larger quantities of nitrogen in the 
form of sulphate of ammonia increased the yield, this was not the case when 
nitrogen was applied in larger quantities in the form of nitrate of soda. 
Phosphoric acid in the form of ground phosphates was not applied in this 
experiment, although by the application of 303 lb. of acid phosphate the yield 
was increased 5 per cent., while an increase of 10 per cent. resulted from an 
application of from 455 to 607 1b. 
Lime was of great benefit on this soil, the yield of cane being increased by 
its application 15 per cent.: from 23:610 lb. to 27°152 1b. (based on an average 
of 18°67 per cent. sugar). The plots upon which lime had not been applied 
showed in every instance a lower analysis of sugar in the juice of the canes. 
Mr. J. D. Kobus, of Soerabaia,* inaugurated experiments in Java for the 
purpose of observing the effect on sugar-cane of large applications of nitrogen. 
These experiments extended over several years, and were conducted upon a 
light, gravelly soil, which requires a large amount of nitrogen. 
FERTILISER EXPERIMENT ON SUGAR-CANE UPON A Licut Sotrt. 
By J. D. Kobus, East Java Experiment Station (1892). 
ortd x So 
ete ee} el 58 a Analysis of Juice 
No. Fertilisers Applied Crs eee | s8og 
of per Acre 8 é a Pr 
Plot. in Ib. 25 o8 HENS Polari- 7 
Be £ a7 BE Se Brix. sationt Glucose. | Purity. 
mn 
, Tb. lb. per cent. | percent.' percent. | percent. 
No fertiliser. June 2-3 | 69,519} 6,758 ‘ 15°67 0°65 90°1 
1 ‘ rt 
2 | 157 Ib. sulphate of am-| ,, 3 93,817 9,083 175 | 15°63 0°69 89°6 
3 
monia 
315 Ib, sulphate of am-| ,, 10-11) 108,004) 10,209} 16°9 | 15°21 0°64 89°5 
monia 
4 |472 lb, sulphate of am-| ,, 11 | 125,763} 11,800} 17°3 | 15°26 0°65 88°5 
monia 
5 | 197 1b. nitrate of soda...} ,, 14-15) 92,575! 9,626] 17°8 | 16°34 0°47 91°8 
6 |8931b, nitrate of soda...| ,, 19 | 104,298] 9,976} 183 | 15°96 0°73 87°4 
7 1590 1b. nitrate of soda...! ,, 12-13!116,447! 10,675! 16:7 | 14°88 0°62 89'L 
In this trial the double, and also the triple applications of nitrogen produced a corresponding 
increase in the yield ; the increase was larger in the case of sulphate of ammonia than in the case 
of nitrate of soda. : 
FERTILISER EXPERIMENT ON SUGAR-CANE UPON A GRAVELLY Sort (TARRABAN). 
By R. J. Bouricius, Ketegan Experiment Station, Java (1893). 
Sugar ob- Analysis of Juice under Pressure 
No. Weight of |tained from of 75 per cent, 
of Fertilisers Applied per Acre in lb. | Cane from |1 Acre at 75) —————______*> 
Plot. 1 Acre. per cent. Sugar 
Pressure. | Brix. Sugar, | Purity. loptained, 
A Tb. lb. per cent. | per cent. | per cent. | per cent. 
1 &8| No fertiliser ai ih t¢; 72,586 9,296 | 20-1 92°5 17°10 | 17°10 
2 &7 | 157 lb. sulphate of ammonia ... 81,901 11,314 | 19°8 92°7 16°96 | 16°96 
8&6] 315 ,, ” ” fy) ... | 104,414 11,683 | 20°0 87'3 14°92 | 14:92 
4&51472,, ” ” ) ... | 107,520 11,683 18°0 90°3 14°50 | 14°50 
These results, as well as those tabulated below, seem to agree with the results obtained in the 
previous year, 
* “Archief vor de Java-Suikerindustrie,” 1896, p, 101. 
