THE BROADBALK WHEAT BOILS. 
113 
treatment and evaporation to dryness with 50 cubic centimeters of 
strong hydrochloric acid, the residue being redigested on the water 
bath for oik* hour with -2~> eubie centimeters of strong hydrochloric 
add. 
The eitric-acid-soiuble potash was determined in the solution ob. 
tained on treatment ol 200 mams of the soil, as already described 
under the heading of phosphoric acid, the potash being determined 
in a quantity of solution representing o<) grams of soil. 
The results for the ISIKJ samples were as follows: 
Tam.k t',1. — HnmillHilk irhmt soils, snmph s cnllc-h il in October, 28dS — POTASS 
tli fi rm i tuitions. 
POTASH DISSOLVED BY STKONO HYDlii K'llLi >RIC ACID. 
First depth. 
Second depth. 
Third depth. 
Plat. 
Annual manuring. 
Per 
Pounds 
Per 
Pounds 
Per 
Pounds 
<-ent. 
per acre. 
cent. 
per acre. 
cent. 
per acre. 
2u 
a. in 
6.1*5:$ 
n.398 
Ilk 088 
0. 415 
13,930 
M i 
,m 
8,661 
. :tls 
S. 195 
. 199 
11.585 
;i 
.220 
B,7M 
. m 
8, Ml 
. 49a 
18,818 
4 
rninanureil since K>2 
811 
5. tils 
U4 
11,068 
.507 
14, 168 
Full mineral* 
. 279 
7.233 
.410 
10.952 
. 172 
18,176 
Full minerals and ammonium salts 
.262 
6,793 
,M 
8,618 
. 159 
12,813 
10a 
Ammonium salts i no minerals sinco 
1844) 
.240 
ti. 222 
:»4 
10.525 
.533 
14,879 
|0b 
Ammonium salts ( no minerals since 
.234 
8,067 
868 
9.590 
.507 
14,153 
11 
Ph. .-phates and ammoninm salts 
.197 
5, m; 
.» 
9.537 
.459 
12.813 
12 
Phosphates, sodium, and ammo- 
.223 
m 
.sn 
9,911 
.488 
13,623 
LB 
Phosphates, potassium, and annuo 
.273 
an 
in. 121 
.433 
12,087 
11 
Phosphates, iiuiK'nt'sium. and annuo 
2»0 
6,222 
4<U 
10,788 
His 
11,389 
POTASH DISSOLVED NY A 1 I'KK <T.XT SoLL'TlOX OF CITRIC ACID. 
First depth. 
Second depth. 
Third depth. 
Plat. 
Arnual manuring. 
Per 
Pounds 
Pei- 
Pounds 
Per 
Pounds 
cent. 
per acre. 
cent. 
per acre. 
cent. 
per acre. 
2a 
Farmyard manure since 1KK4 
0.0880 
828 
0. 0168 
449 
0.0096 
268 
2b 
Farmyard manure .V) yean 
.0384 
sw 
.0276 
737 
.0128 
357 
3 
.0088 
83 
.0060 
160 
.0072 
201 
4 
Cnmanured since 1868 
.0052 
186 
i 
160 
.eon 
123 
.(KJ08 
:w 
.0221 
598 
.00! >2 
257 
Full minerals and ammonium salts . 
.0888 
602 
.0140 
374 
.0064 
179 
LOa 
Ammonium salts (no minerals since 
1844) 
.0032 
83 
.0032 
86 
.0048 
134 
10b 
Ammonium salts i no minerals since 
1850) 
. (MU0 
184 
.0052 
139 
.0036 
101 
11 
Phosphates and ammonium salts ... 
.0032 
83 
.0028 
75 
.0036 
101 
12 
Phosphates, sodium, and ammo- 
101 
.0040 
hu 
.0040 
107 
.0036 
13 
Phosphates, potassium, and ammo- 
nium salts 
.0188 
487 
.0136 
363 
.0084 
235 
14 
Phosphates, magnesium, and ammo- 
.0052 
145 
.0024 
62 
.0048 
128 
As far as regards the hydrochloric-aeid-soluble potash, attention 
need only be directed to the surface soils, though in the case of the 
bitric-acid-soluble potash ii will be of interest to consider the results 
lor all the three depths examined. The hydroehlorie-acid figures, 
however, for the second and third depths appear to have so little 
9385— No. 106—02 8 
