MANURING EXPERIMENTS WITH PADDY RICE (THIRD YEAR). 1 7 
of which will be found in bulletin No. io, p. ig. With each 
kind of manure 6 single trials were made, 3 with a small 
quantity of the respective phosphate, 3 with a large dose,— 
just double of the former. 
The plots were left uncultivated till May 1891, when their 
soil was turned ; in the middle of June they received all alike 
10 kilogrms. of nitrogen as ammonium sulphate and 10 kilogrms. 
of potash as carbonate. The yield, average of 3 equally treated 
plots, was as follows : 
Phosphoric acid 
per frame 
Kind of phosphate. 
Yield per frame. 
applied 
in 1890 . 
grms. 
not re¬ 
covered 
in 1890 
grms. 
Straw 
grms. 
Full 
grain. 
grms. 
Empty- 
grain. 
grms, 
Whole 
crop. 
grms. 
O 
O 
No phosphatic manure . 
394 
274 
4 
672 
3-89 
2.95 
Double Superphosphate 
4OO 
308 
+ 
712 
7.78 
6.40 
Î! »» • • • • 
457 
37 1 
5 
833 
4-59 
3-44 
Precipitated Phosphate. 
444 
323 
4 
771 
9.18 
7-53 
11 11 •*•••• 
514 
418 
4 
936 
6.97 
6-39 
Peruvian Guano . 
5 I 9 
396 
. 4 
919 
13-94 
13-07 
»> 11 •••••••• 
593 
460 
6 
1059 
6.885 
5-94 
Thomas Phosphate . 
5*3 
407 
5 
925 
I 3-77 
12-35 
11 11 . 
575 
478 
6 
1059 
6.885 
5.91 
Steamed Bone Dust . 
531 
416 
6 
953 
x 3-77 
11.66 
11 11 11 .. 
627 
517 
6 
1150 
6.885 
5.88 
Crude Bone Dust . 
495 
375 
5 
875 
I 3-77 
11.65 
11 11 11 • • • • • • • • 
574 
454 
5 
1033 
6.885 
6-43 
Bone Ash. 
418 
308 
5 
731 
13-77 
I2 -75 
” ” ; . 
472 
350 
4 
826 
6.885 
6.77 
Phosphorite . 
423 
3H 
4 
741 
*3-77 
13.69 
» . 
513 
387 
6 
906 
