VARIOUS PHOSI’HATIC MANURES ON UPLAND SOIL. 
s 
topsoil. A fortnight after sowing, new seeds were sown in the 
few places where the first ones had failed to germinate. During 
the winter all the cylinders were covered with straw mats, because 
our soil inclines much to the formation of long ice crystals on the 
surface, which would lift the young plants and break the roots. 
One the 20th of February, 1891, 5c kilograms more of nitrogen 
as ammonium sulphate were applied per hectare as a top manure. 
During the growth, nothing particular was noticed, except that 
plot No. 24 was seriously injured by lice, and had therefore to be 
excluded from the analysis. On the 27 th of May when the seeds 
were still somewhat doughy, the plants were cut, dried in the air, 
and then weighed and analyzed. 
The produce of dry matter per plot and the action of the fer¬ 
tilizers on the yield will be seen from the following table. 
No. 
of 
Plots. 
Phos¬ 
phoric, 
acid, 
applied. 
grms. 
Kind of Phosphate. 
Dry 
matter 
produced 
grms. 
Plus-yield 
over the 
plots with¬ 
out phos¬ 
phoric 
acid, 
grms. 
Plus-yield 
caused by 
100 grms. 
ol phos¬ 
phoric 
acid, 
grms. 
3, ”, !9- 
O 
) r 
>iSo pnospliatic manure. 
72.8 
— 
— 
30, 38, 46. 
O 
I. 9, 17- 
2.120 
Thomas phosphate 
215.9 
1431 
6750 
2, 10, 18. 
d.240 
a a 
322.1 
249-3 
5880 
4, 12, 20. 
1-413 
Double superphosphate 
269.6 
196.8 
13928 
5. 13. 21. 
2.826 
if H 
3857 
312.9 
I IO72 
6, 14, 22. 
2.120 
1 Precipitated calcium \ 
250.7 
177-9 
8387 
29. 37. 45- 
4.240 
Ç phosphate . 
347-c 
274.2 
6467 
7. 15. 23- 
2.826 
Bone ash . 
I 50. 1 
77-3 
2735 
8, 16, 24. 
5652 
if if . 
256.7 
lS 3-9 
3254 
25. 33. 4i- 
1.696 
Steamed bone dust ... 
262.0 
189.2 
11156 
26, 34, 42. 
3-392 
a a a 
353-2 
280.4 
8267 
27. 35. 43- 
1.696 
Crude bone dust. 
201.6 
128.8 
7594 
28, 36, 44. 
3-392 
if . if if . 
318.4 
245 6 
7241 
3h 39, 47- 
1.696 
Raw crushed bones ... 
199-5 
126.7 
7471 
32, 40, 48, 
3-392 
it ii it ••• 
3'4-4 
241 6 
7124 
