MANURING EXPERIMENTS WITH PADDY RICE (SECOND YEAR). 
7 
ammoniacal compounds, the supply of nitrogen rendered 
available by decomposition in the soil or imparted to the field 
by rain and irrigation must have amounted in 1890 to 6.06 
kilogrms. per tan. As our soil is exceptionally rich in 
nitrogenous organic compounds, while the water used for 
irrigation and the rain are poor in nitrogen, we may conclude 
that the greater part of the above amount was yielded by the 
soil, and that under other conditions, on soils poor in humus, 
the supply of nitrogen by decomposition will fall considerably 
below the above quantity. 
The content of nitrogen in the crop of the two unmanured 
plots (3.47, resp. 3.89 grms.) was in i8go a little larger than in 
188g, owing to the presence of more phosphoric acid in the 
young transplanted rice, which enabled them to consume and 
work up more of the available nitrogen of the soil. 
Of the nitrogen applied as ammonium sulphate to the plots 
with complete manure the following proportions were taken up 
in the two seasons : 
Nitrogen.1889. 1890. 
In thé whole crop.13.37 grms. 12.46 grms. 
In the crop grown without 
nitrogen . • 7-54 h 743 ». 
Taken up from the manure ... 5.83 ,, 5.03 ,, 
Applied in the manure .9.18 ,, 9.18 ,, 
Taken up, per cent of the 
nitrogen applied.63.0 ,, 54.8 ,, 
In the favourable season of 1890 the rice consumed less 
nitrogen from the manure, but produced with it a larger propor¬ 
tion of organic matter than in 1889, as is demonstrated by the 
lower percentage content of nitrogen in all the above crops of 
1890. 
Turning now to the consumption of phosphoric acid by rice, 
our analysis gave the following results : 
