ANTISEPTIC TREATMENT OF SOILS. 



173 



Table II. Estimation of Mineral Plant Food Soluble in 1°/ 

 Citric Acid. 



No, 



Lii 



ne. 



Potash. 



Phosphoric Acid. 



* 



Untreated. 



Heated. 



Untreated. 



Heated. 



Untreated. 



Heated. 



1 



•066 



•066 



•022 



016 



•037 



•042 



2 



not deter 



mined. 











3 



•273 



•259 



•017 



•009 



032 



•032 



4 



not deter 



mined. 











5 



•251 



•275 



•026 



•016 



027 



•028 



6 



•0148 



•0136 



•007 



•010 



•003 



003 



* For particulars see Table I. 



Table III. Estimation of Mineral Plant Food Soluble in Njb Nitric 



Acid. 



No. 



Lime. 



Potash. 



Phosphoric Acid. 



* 



Untreated. 



Heated. 



Untreated. 



Heated. 



Untreated. 



Heated. 



1 



(a) -084 

 {0) \ -096 



•084 

 ) -102 

 \ -085 



•051 



•045 



•064 



•041 



2 



(a) -252 

 < b > 1 -258 



•228 

 ( -240 



i -222 



•052 



•058 



•067 

 / -064 

 1 -064 



•077 



3 



(a) -339 



/M / * 417 

 ( b M-342 



•353 

 / -414 

 \ -406 



•050 



•048 



•060 



079 



* For particulars see Table I. 



Prom the figures obtained it is clearly evident that treat- 

 ment by heat or antiseptics makes no appreciable difference 

 in the solubility of the mineral fertilising ingredients in 

 acids. The differences obtained are not very great nor in 

 a constant direction, and are probably due to accidental 

 inaccuracies. 



