MANURING EXPERIMENTS WITH PADDY RICE (THIRD YEAR). 
*5 
complete manure (see this bulletin, p. 3). The proportions of 
phosphoric acid applied in 1889 and left unrecovered, as well as 
the produce in the third season, will be seen from the following 
table : 
Phosphoric 
acid applied 
per frame 
in 
1889. 
grms. 
Phosphoric acid 
not recovered. 
Yield per plot in i8gi. 
in 
1889. 
grms. 
in 
1890. 
grms. 
Straw. 
grms. 
Full 
grain. 
grms. 
Empty 
grain. 
grms. 
Whole 
crop. 
grms. 
O 
— 
— 
37 1 
271 
5 
647 
4-59 
3-65 
3-65 
386 
279 
4 
66g 
g.18 
6.99 
6-99 
405 
300 
5 
710 
1 3-77 
10.86 
10.38 
454 
35 6 
5 
815 
18.36 
14.81 
13.92 
5 l8 
402 
6 
926 
22.95 
19.32 
18.09 
567 
458 
7 
1032 
27.54 
23.29 
21-73 
561 
459 
7 
1027 
Complete manure. 
780 
576 
9 
1365 
The phosphoric acid applied in 1889 had still, according to 
these results, a distinct effect on the crop of 1891. The yield 
of grain on the plot with the largest dose of phosphate was 
nearly twice as high as on the plots without phosphoric acid, 
but did not attain the figure obtained on the plot with complete 
manure, which included a fresh application of 8.33 grms. of 
phosphoric acid in the form of double superphosphate. 
Similar were the results arrived at by the determination of 
the phosphoric acid consumed by these crops from the residues 
in the soil, as will be shown by the following figures : 
