Ff:RTiLrrv and fertilizer hints 



Sulphuric (hydrogen, sulphur and oxygen") H-.SO^ 

 Hydrochloric (hydrogen and chlorinej HCl 

 Phosphoric (hydrogen, phosphorus and oxygen) H,,P._,Os 

 Carbonic (carbon and oxygen) CO. 

 Silicic (silicon and oxygen) SiO., 



Bases 



Lime (calcium and oxygen) CaO 

 Soda (sodium and oxygen) XajO 

 Potash (potassium and oxygen) K^O 

 Magnesia (magnesium and oxygen) MgO 

 Iron oxide (iron and oxygen) Fe^O;. 

 The mineral elements do not exist as acids and bases in the 

 ash because in the burning of plant substances there is a re- 

 arrangement of the mineral elements and salts are formed. 



Salts. — The elements exist in the ash of plants as salts. That 

 is the acids and bases are united and form : 

 Phosphates ] | Calcium 



Sulphates |^ ' Magnesium 



Chlorides f ^ Sodium 



Carbonates j [ Potassium 



We are all familiar with some of these salts 

 combinations are : 

 Chloride of sodium (conmion salt) 

 Carbonate of lime (limestone) 

 Chloride of potash (muriate of potash ) 

 Carbonate of soda (baking powder) 



A few of the 



Sulphate of soda (Glauber's salts) 

 Sulphate of magnesia (Epsom salts) 

 Sulphate of calcium (gypsum) 

 vSulphate of potash (common sul- 

 phate of potash of commerce) 



Variation of Ash. — The content of ash in diiTerent plants and 

 parts of plants varies a great deal as the following table shows : 



Corn . • 

 Oats .. 

 Rice .. 



Wheat 



Roots and tubers (fresli) 



Beet (mangel; 



Carrot 



Irish potato- 

 Sweet potato- 



Oat 



Rice 



Rve 



Wheal 



Forage plants (hay) 



Alfalfa 



Crimson clover 



i Orchard grass 



Timothv 



Ash 

 Per cent. 



5-1 

 7.8 

 3-2 

 4-2 



7-4 

 8.6 

 6.0 

 4-4 



