Xll CONTENTS 



CHAPTER VIII 



PAGES 



POTASH FERTILIZERS 212-222 



Potassium an essential element ; Amount of potash re- 

 moved in crops ; Amount in soils ; Source of soil potash ; 

 Commercial forms of potash ; Stassfurt salts, occurrence 

 of; Kainit; Muriate of potash ; Sulphate of potash ; Other 

 Stassfurt salts ; Wood ashes, composition of; Amount of 

 ash in different kinds of wood ; Action of ashes on soils ; 

 Leached ashes ; The alkalinity of ashes ; Coal ashes ; 

 Miscellaneous ashes ; Commercial value of potash ; Use 

 of potash fertilizers ; Joint use of potash and lime. 



CHAPTER JX 



LIME AND MISCELLANEOUS FERTILIZERS . . . 223-232 



Calcium an essential element ; Amount of lime removed 

 in crops ; Amount of lime in soils ; Different kinds of 

 lime fertilizers ; Their physical and chemical action ; Action 

 of lime upon organic matter and in correcting acidity of 

 soils ; Lime liberates potash ; Aids nitrification ; Action of 

 land plaster on some * alkali ' soils ; Quicklime and slaked 

 lime ; Pulverized lime rock ; Marl ; Physical action of 

 lime ; Judicious use of lime ; Miscellaneous fertilizers ; 

 Salt and its action on the soil ; Magnesium salts ; Soot ; 

 Seaweed ; Strand plant ash ; Wool washings ; Street 

 sweepings. 



CHAPTER X 



COMMERCIAL FERTILIZERS 233-254 



History of development of industry; Complete fertili- 

 zers and amendments ; Variable composition of commer- 

 cial fertilizers ; Preparation of fertilizers ; Inert forms of 



