33G Absorption of Potash by Soils of known Composition. 
Moisture 2 - 95 
Organic matter and water of combination .. 6"75 
Oxides of iron and alumina 640 
Carbonate of lime 1-22 
Alkalies and magnesia 1-20 
Insoluble siliceous matter (sand and same clay) 82*22 
10044 
The solution of potash was combined with 3500 grains of this 
soil and treated as before. 
Anhydrous Potash. 
4 decigallons of potash, solutions, before contact! 33.QQQ 
with 3500 grains of soil, contained / 
After contact 14-031 
Potash absorbed by the soil .. 19-935 
According to these determinations, 1000 grains of the fertile 
turnip loam absorbed only 5"69 of anhydrous potash, which 
is less than the quantity absorbed from a solution of the same 
strength by the stiff clay and the calcareous subsoil used in the 
preceding experiments. 
Experiment No. 4. — On Pasture Land. 
The analysis of this soil yielded the following results : — 
Moisture 2420 
Organic matter 1P700 • 
Oxides of iron and alumina .. ' 1T860 
Carbonate of lime 1-240 
Sulphate of lime '306 
Phosphoric acid . . *080 
(Chloride of sodium 412 
Potash (soluble in acid solution) "910 
Soluble silica 4-090 
Insoluble siliceous matter 67-530 
100-248 
The insoluble siliceous matter here mentioned consists of 
about equal proportions of clay and sand. The soil, it will be 
seen, is rich in organic matter, and also contains a fair proportion 
of soluble potash. Like other pasture land, rich in organic 
matter, it is rather deficient in lime, and would be much improved 
by liming or marling. The experiment was in this instance 
carried out in precisely the same manner as before. . 
Anhydrous Potash. 
Before contact with the soil, 1000 grains of potash) ^.0^3 
solution contained / 
After contact "390 
Difference 
•823 
