410 



STATE BOARD OF AGRICULTURE 



/Z 





4- 

 3 



/ 



c.c. o./^y^/ ^f {//)/. 



Fig. 9. — Titration curves — clay loam soil. 



Curve No. 0. Initial titration curve, Ca(0H)2. 



No. 1. After standing one day, Ca(OH)2. 



No. 2. After .standing two days, Ca(OH)2. 



No. 3. Back titration of Ca(OH)2 series with HCl. 



No. 4. Initial titration curve, HCl. 



" No. 5. After standing one day, HCI. 



No. 6. Back titration of HCl series with Ca(OH)2. 



/o 



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