SEVERAL NITROGENOUS FERTILIZERS. 
33 
of the plants does not accurately indicate the quantity of the 
manure that really became active. It must therefore be left to 
future researches to decide which of the above two scales best 
coincides with the agricultural values of the fertilizers. 
On June 21st, 1889, after the barley had been harvested, the 
top soil in the patches was digged up, taken out in a spacious 
vat, the roots and stubbles were cut in small pieces, well mixed 
with the soil, which was then retransferred into the cylinders. 
Thereupon 89 seeds of upland rice were sown with the help of 
the perforated disk. Germination appeared to be very uniform 
in all the cylinders, but when the upper part was about 5 
centimetres high, the plants of several patches were injured by 
beetles which consumed the seeds. We therefore again took 
out the soil and resowed, but again much damage was done by 
beetles. On October ist, when the seeds were still somewhat 
soft, we cut the crops, but abstained from taking into account 
the injured patches. 
The appearance of the plants in the cylinders indicated 
throughout the whole time of growth, that the nitrogenous 
manures given to the preceding crop, had no longer any influence 
on the rice, and the following weights of the air dry plants 
likewise showed the available nitrogen of the manures had been 
entirely consumed by the barley : 
I a Without nitrog. manure 
»> ^ 1» j» >» • 
>» ^ 1» »» J» 
II c Ammonium sulphate 
III b Ammonium sulphate 
»» £ >» 1 » . 
IV a Night-soil . 
»» ^ »» . . 
V b Night-soil . 
»>£ >1 .. 
Nitrogen 
Produce 
per 
hektare. 
kilogrms. 
on each 
plot, 
grms. 
in the 
average. 
grms. 
— 
67 
— 
73-5 
. 67.2 
— 
6l 
30 
64 
64 
6O 
6l 
1 65 
J» 
69 
40 
6l 
1 61 
1 1 
6l 
) 
80 
62 
j 60 
tt 
5 8 
