ee 
1 Junx, 1899.] QUEENSLAND AGRICULTURAL JOURNAL. 471. 
applications being repeated in the spring of 1894. On 22nd April, 1895, 
oranges were taken from each plot. The samples, duly numbered, were sent to 
the laboratory for analysis. The results of this analysis are given in the 
table :— 
Quality of Oranges. 
Ne: SH eae applied | Per cent. of 
Plot. : bs ; Per cent. of | Per cent. of | I se of 
ot Boerne of Solid Contents Sugar f Siigae aoe 
wath in Juice. in Juice. | Unfertilised 
Plot. 
1 | No fertiliser... ive: w, at 40 750 8°37 
2 | 20 1b. nitrogen | Re re uy 39°3 9°01 10°64 271 
¢ 50 ,, phosphoric acid Ye a 38'2 8°74 10°77 28°6 
4 iy Fs Bote 3 fy: fed 36 8°20 9°80 17°0 
») nitrogen a oF : a 7 . 
54 50 uf phosphoric acid ae \ 376 792 9°55 LAO 
6 |No aay 
20 Ib. nitrogen ay f 7 . 
7 Ty potash Bait es72 8-71 10°64 71 
59 ,, phosphoric acid a 9 . 4 Be 
8] 75 ti potash ... 5 rs \ 340 9:38 11°38 aa 
20 ,, nitrogen Hb ar 
a 50 . phosphoric acid u, 31:0 9°33 11°52 37°6 
75°,, potash ... , f 
10 | 400 ,, plaster. 
1 2? ,, stable manure... a oo 36°0 8°40 9°90 18°0 
With reference to these trials, Dr. Woodbridge makes the following 
remarks :—“The oranges on the manured plot (No. 11) were inferior, the 
surface being sunken away and soft in many places, and the fruit was soft and 
somewhat puffy. Plot 2—the nitrogen plot—contained more puffy oranges 
than any other plot. Plots 8 and 9 were far ahead in general appearance of 
any oranges from other plots, and plot 9 was of a much deeper colour. The 
leaves on plot 9, also, showed a much deeper and healthier colour. Especially 
striking are the facts—Ist, that the percentage of sugar was raised 37°6 per cent. 
in plot 9 in comparison with plot 1, where no fertiliser was applied, and, 
secondly, that the rind was reduced 22°5 per cent. 
Unfortunately, the yields obtained in these trials are not given, and the 
only conclusion to be drawn is that the mixture applied to plot 9 produces a 
very béneficial effect upon the quality of the orange and apparently also upon 
the devélopment of the tree itself. 
Observations made in Florida prove that manuring with a complete fertiliser 
produces excellent results upon the quantity of the yield. 
It is interesting to note that Professor Woodbridge’s experiments were 
conducted upon a soil rich in potash, which latter, however, was in an almost 
entirely unavailable state. Not until the plant had been artificially supplied 
with the easily assimilable forms of the Stassfurt salts Gn this instance with 
sulphate of potash), was it capable of absorbing such quantities of potash as 
were needed for the production of good oranges. This observation proves 
conclusively that the quantities of various plant-food ingredients, found in the 
soil, rarely correspond to the amounts actually required by the plant, a fact to 
which sufficient attention is seldom paid. 
CULTIVATION AND FERTILISATION OF LEMONS, DUMVILLE GROVE, 
FLORIDA, U.S. 
A lemon-tree yielded from eight to ten boxes of lemons annually. This 
tree was fertilised during 8 successive years with 40 lb. (per year) of the mixture 
given below. The fertilisers were put on in three equal applications, in 
February, June, and November of each year, at a depth of $ to 1 foot and at a 
distance of 12 to 6} feet. They were put into a ditch surrounding the trunk 
and covered with water, after which the ditch was filled up. 
