THE HKOADHALK WHKAT SOILS. 
115 
plats 1l' and L4 are very much more fertile than plat 11, though dis- 
tinct ly l«-ss fertile than plat L3, which gets an abun< lance of potassium 
salts, and still less so than plat 7, which gets all three salts. 
.The results of the determinations of hydrochloric-acid-soluble 
potash in the first depths and of the citric-acid-soluble potash in all 
three depths of the various plats will be seen to oosses.s great interest 
and are worthy of consideration in detail. 
For the moment, however, we may advantageously condense our 
table as we did in the case (> f phosphoric acid and consider the average 
results j^i ven, respect ively, by the plats manured and un manured with 
potash salts and with dung. These are as follows: 
T.U5LK <k>. — Brn<l<lb<llk irhnit soils, smuph s cnlh'ctril in October, 189S, 
Plat. 
Annual manuring for ".<» 
years < with some vari- 
ations during the ear- 
lier years). 
Average in>tash in flue dry soil. 
Average yield 
per acre, 
issy ls«.»4. 
Dis 
s<>lv»-d 
by hy- 
driM-hli »■ 
ric and 
Dissolve* 1 by 1 per cent 
citric acid solution. 
First 
'.' inch.--. 
First !" 
inches 
Sr. •olid 
inches. 
Third !» 
inches. 
Wheat. 
Straw. 
3 t, 10a, 10b, 
11. 12,and U. 
13, 7. and 5. 
2b 
2a 
No potash salts, except 
odd dressings in early 
yearsnn in 1), l.iand 1 \. 
All manured annuallv 
withdri'.ssings.includ- 
ing potash salts. 
11 tons farmyard ina 
nnre yearly. 
14 tons farmyard ma- 
nure, commencing 
only in 1884 B& 
/•. /• « , nt 
0.SK 
.271 
2fvi 
/'. ;• rent. 
0. UJCM 
,0M9 
<UM 
.000 
/■. r a •>! 
0. IMMC, 
.0107 
.0070 
.0M8 
I'rr r« nt. 
0.0018 
.UNI 
.0128 
.0008 
Bush* to. 
80 
80] 
Cwt. 
171 
251 
38} 
88| 
The continuous application of potash, whether in the form of pot- 
ash salts or of dunjr, had made itself evident in t he hydrochloric-acid- 
soluble potash. But there is no such difference as, apart from knowl- 
edge that the samples are from the same held, would sutlice to lead 
to the conclusion that the soils of the first group were, from a practical 
point of view, deficient in potash. Taking the averages for the first* 
group as unity, we find the following' ratios: 
Number of plats. 
Ratio of hy- 
drochloric- 
acid-soluble 
potash to 
that in 7 non- 
potash plats. 
: plats 
I plats 
1 plat 
1 plat 
Without potash for forty years 
Potash dressed 
Dung fifty years 
Dung nine years 
1.00:1 
1.30 : 1 
1.27:1 
1.23:1 
