Study on flowering plant cultivate soil's acidity and alkaline

For creating suitable soil environment for plant′s growing,we determined the pH of the compounded flowering plant cultivated soil and the soil of Baoding Botanical Garden.Adding different density of FeSO4 solution,acidified the soil,the result indicated the pH of flowering plant cultivated soil changes from minute alkaline to strong acid due to different proportioning of the cultivated soil.pH value of the garden′s soil was found slightly alkaline.After adding the acidic material,the pH reduced to neutral-minute acid which is suitable for plant′s growing.