CONTENTS. 
Object of work 5 
Soil types used 5 
Method 6 
Absorption of phosphoric acid 6 
Absorption of potash 10 
Absorption of nitrogen 12 
Ammonium sulphate 12 
Sodium nitrate 14 
Absorption of fertilizer salts by fresh and air-dried soils 16 
Absorption of phosphoric acid 16 
Absorption of potash 19 
Absorption of nitrogen 20 
Ammonium sulphate 20 
Sodium nitrate 21 
Absorption of fertilizer salts when applied in mixtures, and the effect of heat 
and antiseptics 22 
Absorption of phosphoric acid 22 
Absorption of potash 24 
Absorption of nitrogen 26 
Ammonium sulphate 26 
Sodium nitrate 27 
Removal of absorbed salts 27 
Removal of absorbed phosphate 28 
Removal of absorbed potash 28 
Removal of absorbed nitrogen 29 
Summary 29 
Acknowledgments 32 
(4) 
