THE POSSIBILITIES OF ARTIFICIAL MANURES IN FORESTRY. 251 
the direction of the Kgl. Oberforster, Herrn Halleux. The 
experiment was started in 1894 on very poor heath land, which 
consisted mostly of grey and yellow sand, with extremely little 
organic matter. Five plots were laid down in order to test the 
value of the basic slag and kainit in varying quantities. Columns 
I. and II. of the subjoined Table give the varying quantities. 
The manures were applied in autumn before planting. In 
August 1903, that is nine years later, the plants were carefully 
measured. These measurements are shown in Column III. 
He Il. I - 
In 1903, 
BLO Basic Slag. Kainit. 9 years old. 
Cwts. Cwts. Average Height. 
per acre. per acre. ft. ins. 
I. 16 1°6 Se 
i. 96 ee 7 et 
Ik a4 4°8 6. ES 
EV. 3°2 None 5 7 
V Unmanured 4 3 
On Plot III., which received the maximum of kainit and the 
minimum of slag used in this experiment, the plants are nothing 
like so good as on Plot I., where the proportions were reversed. 
Further, it was found that on Plot III. many plants died off in 
the first and second year, and for two successive years beating 
up was necessary. This was not found necessary on the other 
plots. Plot V., which was unmanured, showed many diseased 
plants attacked by rust, no trace of which was to be found on 
the other plots treated with the slag. On Plot V. all the plants 
were weakly, with short, yellow needles, and they gave no 
promise of future growth, while on Plots I. and II. the young 
pines had for four years formed a complete canopy. On Plots 
III. and IV. the cover was only partial. Plot I., which had got 
most slag, was by far the best as regards the height and health 
of the trees, which all showed a dark green healthy colour. The 
conclusions drawn from this experiment were that 3:2 cwts. 
of slag per acre is too little, and that 8 to 12 cwts. is more 
like the quantity. The effect of the kainit is not so striking. 
II. Experiment by the community of Zolder, started in the 
year 1898, under the direction of Herrn Oberforster Dubois. 
The area was about 9} acres in extent, consisting of heath land. 
This was broken up in January during dry weather, and the 
