Soda-Salts in Af/riculture. o07 



a slight excess of chlorine, amounting to I'-IU grain, again 

 showing that, whilst soda is retained in the soil, the whole of the 

 chlorine of the salt-solution passes through it. 



The actual (juantity of chlorine found in the liquid atter 

 contact with the soil amounted to 26*65 grains, which were 

 divided amongst the four chlorides as follows : — 



Chlurine ill combination with sodiiun 

 Chlorine in combination witli magnesium 

 Chlorine in combination with potassium 

 Chlorine in combination with calcium 



26-65 



Chloride of 

 Sodium. 



Soda. 



IJel'ore the experiment the salt solution contained .. 4].*52 = 22'00 

 After contact with soil 37'36 = lO'TU 



Difference 4-lG = 2-21 



1000 grains of the sandy fertile loam consequently absorbed only 

 0*62 of a grain of soda. 



Experiment No. 4. — On Pasture Land. 



The analysis of this soil yielded the following results : — ■ 



Moisture 2-420 



Organic matter ll'TOO 



Oxides of iron and alumina ll-8()0 



Carbonate of lime 1'240 



Sulphate of lime '306 



Pliosphoric acid '080 



Chloride of sodium •112 



Potash (soluble in acid) '910 



Soluble sihca 4-090 



Insoluble siliceous matter G7-530 



100-248 



The experiment was in this instance carried out in precisely the 

 same manner as before. 



The clear filtrated solution, after contact with soil, on analysis, 

 gave the following results : — 



Grailis. 



Soluble silica •]2 



Oxides of iron and alumina -28 



Chloride of sodium 34-92 



Chloride of potassium -72 



Chloride of magnesium .. .. -47 



Chloride of calcium 5-30 



Sulphate of lime '41 



Phosphoric acid traces 



42-22 



