58 MANURES. 
i. . ——— — — —— ————— — ————— ——————— 
| 
No.of Actual | Yield of 
No, Manure used per acre. hills yield per|equal No. 
‘| acre of hills. 
RUTTER RS 128 | 1,947) 3,044 
2. 400 ths. sulphate of ammonia........... (122) 9,385 | 15,387 
d. 400 ibs. superphosphate of lime........| 184] 21,211 | 23,059 
490 tbs. superphosphate of lime... - 2 
= 490 ibs. sulphate of ammonia..... \ irae Neate lange oo. 
5. 250 ibs. plaster (sulphate of lime).....; 184 | 22,848 | 24,836 
6. 2000 Ibs. unleached hard wood ashes.| 162 | 13,058 |; 16,120 
- 2090 ths. unleached ashes........ ; e 10K 
‘ | 250 tbs. plaster (mixed together). f | ideal ado ake 
Sect tos se arminon Sal ts.i20. 02h ne eeacncaiec 161} 7,570} 9,403 
490 Tbs. sulphate of ammonia..... 
9. ~ 400 Ibs. superphosphate of lime.. }| 112 | 10,528 | 18,790 
2000 Tbs. unleached ashes........... 
400 Ibs. superphosphate of lime.. - 9 = 99 
es { 2000 tbs. unleached ashes........... \ ENG (ee GP loan 
PSN OF SATUS Fas) chs aieue dcate oe cetsteenbuave 171} 38,186] 38,662 
“Hach plot contained 201 hills, but, as the above table 
shows, many failed. The seed either rotted in the ground 
or was injured by the manure. he last column shows in 
the plainest manner the relative yield per acre, allowing 
the same number of hills to have produced on each plot. 
“gthe effect of plaster (gypsum, or sulphate of lime) is 
interesting and instructive. Not only does the plot ma- 
nured with this show the greatest yield per hill, but with 
one exception (plot No. 3) the greatest number of hills 
germinated and grew. These two plots, Nos. 3 and 35, 
were superior to any others, all through the season. 
“The superphosphate used was a superior article, made 
from calcined bones, expressly for the experiment. It 
should be understood that the best superphosphate con- 
tains at least 50 per cent. of plaster; so that if common 
plaster contains 80 per cent. of sulphate of lime, the 250 
tos. applied to plot No. 5 would contain the same quan- 
tity of real plaster as the 400 tbs. of superphosphate ap- 
