Manures and the principles of manuring
Chapter 13
Coprolites 373 Canadian apatite or phosphorite 374 Estremadura or Spanish phosphates 375 Norwegian apatite 376 Charlestown or South Carolina phosphate 376 Belgian phosphate 377 Somme phosphate 378 Florida phosphate 378 Lahn phosphate 379 Bordeaux or French phosphate 379 Algerian phosphate 379 Crust guanos 379 Value of mineral phosphates as manures 380
APPENDIX TO CHAPTER XII.
Imports of phosphates 381