CONTENTS xxiii 



PAGE 



IV. Plant food drawn from the soil by average yields of 



crops ........ 420 



V. Analyses of commercial fertilising materials . .421 

 VI. Analyses of farm manures ..... 422 



VII. Fertilising materials in farm products . . . 423 

 VIII. Schedule for the valuation of fertilisers . . . 426 



INDEX 427 



