38G Field Experiments on Root-Crops. 
[Results of Maxgold Experiments at Grimstox, Kixg's Lynn, in 1870. 
riot. 
Slanure used. 
Produce per 
Plot. 
Produce calculated 
per Acre. 
Increase over 
average 
Unmanured Produce. 
cwts. stones lbs. 
tons cwts. stones lbs. 
tons cwts. 
stones lbs. 
1 
No Manure .. .. 
3 
6 
3 
18 
17 
5 
6 
• 
2 
Dissolved Coprolites 
3 
S 
2 
20 
1 
G 
4 
1 
.5 
7 2 
^ 
Dissolved Coprolites .. ] 
3< 
and \ 
5 
2 
10 
2G 
13 
7 
C 
7 
18 
0 4 
4 
Kainite (Potash-salts) 
5 
0 
9 
25 
7 
5 
6 
6 
11 
6 4 
5 
O 
0 
A 
■i 
A 
't 
Q 
G 
Peruvian Guano 
5 
5 
5 
28 
6 
7 
10 
9 
11 
0 8 
I 
Dissolved Coprolites . . j 
and 1 
7\ 
6 
1 
0 
30 
8 
4 
0 
11 
12 
4 12 
and 1 
V 
8 
i Farmyard Manure 
4 
4 
1 
22 
10 
7 
2 
3 
15 
0 0 
Farmyard Manure ..) 
gj 
and > 
4 
3 
7 
22 
4 
2 
0 
3 
8 
2 12 
Dissolved Coprolites . . ) 
10 
[ No Manure 
3 
5 
10 
18 
11 
3 
6 
5. That the large doses of kainite, dissolved coprolites, and 
guano, which were used in these experiments, did not injure the 
mangold crop. 
On reviewing this Report, it will be found that in every trial 
in which potash-salts were applied to root-crops, either alone 
or in conjunction with other fertilizing matters, they materially 
increased the crops. Considering the number of trustworthy 
experiments now on record, all affording distinct evidence of the 
utility of potash-salts as manuring constituents of a turnip, potato, 
or mangold manure, intended to be used upon light land, there 
can be little doubt of the more abundant use which these salts 
Avill find in British agriculture. During the past season large 
quantities of raw and calcined kainite, and similar impure potash- 
salts, have found their way into the hands of the farmer ; and in 
many cases the experience gained with potash-salts on a large 
scale has corroborated the opinion Avhich I expressed some years 
ago that these salts will often be found very useful when added 
to superphosphate, or to mixtures of superphosphate with ammo- 
niacal salts, especially on sandy soils, and ere long will find an 
extensive application in England. 
Potash-salts are offered for sale under various names, and in 
various forms. All are obtained from the salt-mines of Stassfurt 
and the adjoining mines of Anhalt, and imported into England by 
several rival merchants, who, naturally enough, praise their own 
wares, and occasionally disparage those of their competitors. As 
many trade circulars which reach the farmer have a tendency to 
