CONTENTS xi 



PAGE 



Basic superphosphate . . . . . . . . . 155 



Precipitated bone phosphate . . . . . . . . 157 



References . . . . . . . . . . . 159 



SECTION IV. POTASSIUM FERTILIZERS. 



Blast-furnace potash . . . . . . . . . .160 



Mineral potash manures ......... 161 



References 171 



SECTION V. BONE MANURES. 



Bones 173 



Dissolved bones . . . . . . . . . . .174 



Bone compounds . . . . . . . . . . .176 



References 178 



SECTION VI. COMPOUND MANURES. 



Ammoniated superphosphate . . . . . . . -179 



Potassic superphosphate . . . . . . . . .184 



Complete compounded manures . . . . . . . .185 



References ............ 187 



PART IV. THE USE OF FERTILIZERS. 

 SECTION I. THE TRADE IN FERTILIZERS. 



The valuation of fertilizers . . . . . . . . .189 



The storage of fertilizers ......... 196 



References 198 



SECTION II. THE DISTRIBUTION OF 



FERTILIZERS OVER THE ROTATION 



OF CROPS. 



Early rotations ... 199 



The four-course rotation 203 



Long rotations ........... 205 



References ............ 206 



SECTION III. MANURES FOR SPECIAL 

 SOILS AND CLIMATES. 



Light soils 207 



Heavy soils ........... 210 



Peaty soils 211 



Calcareous soils ........... 212 



Cold climates ... 212 



The tropics . 213 



Wet and dry climates .......... 213 



References 214 



