Potash Manuring for Potatoes. 
305 
looked rather the best. The wheat crop was cut on 
August 9, carted August 21, and threshed November 1. 
The results are given in Table XIV. 
Table XIV . — Soot as Top-dressing for Wheat ( Great Hill), 
1905. 
Produce per acre. 
Plot 
Manuring per acre 
Head corn 
Tail corn 
Straw, 
chaff, 
&c. 
V^alue of 
corn per 
quarter 
on basis 
of 29s. 
Wght. 
Busli. 
Wght. 
per 
bush. 
Wght. 
jBush. 
Lb. 
Lb. 
Lb. 
# 
O. q. lb. 
s. d. 
1 
Soot— 40 bushels .... 
2,721 
421 
64-6 
346 
57 
27 2 10 
29 0 
2 
„ 20 „ .... 
2,286 
351 
65'0 
271 
4‘5 
23 3 5 
30 0 
3 
Unmanured 
1,828 
28'2 
647 
298 
4‘9 
19 3 11 
30 0 
4 
Nitrate of soda — 1£ cwt. 
2,220 
34'5 
64'3 
366 
61 
24 3 27 
30 0 
The wheats were described as being equal to any seen in 
the district that season. The manured plots, it will be noticed, 
were all well ahead of the unmanured ; between 1^ cwt. of 
nitrate of soda (plot 4) and 20 bushels of soot (plot 2) there 
was nothing to choose, but the heavier dressing of soot gave 
a further increase of 7 bushels of corn to the acre with nearly 
4 cwt. more straw. From this it will be seen that the 20 
bushels of soot gave as good a return, at lower cost, as the 
nitrate of soda, while the extra expenditure of 12s. 6d. in 
increasing the dressing of soot to 40 bushels was more than 
justified by the increased produce. It would further appear 
that, beyond its actual nitrogen contents, there is an advantage 
in the soot, due either to the organic matter in it, or, possibly, 
to the mechanical effect which it exercises on the land. 
Potash Manuring for Potatoes (POviD Piece Field), 
1905. 
In 1904 an experiment was conducted on the use of 
sulphate of potash and kainit respectively for the potato crop, 
together with a comparison of the relative effects of nitrate of 
soda and sulphate of ammonia used with the potash salts. The 
result was, generally, to point to sulphate of potash being 
the preferable form of potash manuring, and to sulphate of 
ammonia being rather better than nitrate of soda. This experi- 
ment was repeated on exactly similar lines in 1905. Farmyard 
manure was spread in the rows, at the rate of 12 tons per 
acre, April 15-21, 1905 ; and the potatoes (variety “Up-to-date) 
were set April 24-25, the artificial manures being given at the 
same date. The potatoes were dug up on October 2, and the 
results of weighing are recorded in Table XV., page 306. 
YOU. 67. X 
