XVI CONTENTS 



Chapter Pagt 



Many brands 



Safeguard for the farmer 



Low grade materials 



Inflating the guarantee . . . 202 



Valuation 205 



Low grade mixtures . . . : . . 207 

 Buy on the plant food basis . . . 209 



XXIII. COMMERCIAL FERTILIZERS, CONCLUDED 

 Home mixing of fertilizers . 



Kind and amount to buy 



The crop 



The soil 



The system of farming 

 Testing the soil 



XXIV. ROTATION OF CROPS 



Systems of cropping .... 



The one crop system 



Rotation of crops 



Benefits derived from rotation of crops 

 The typical rotation .... 

 Conditions which modify the rotation 



General rules 



Length of rotation .... 



XXV. FARM DRAINAGE . 



How surplus water affects fertility 

 Indications of a need of drainage 

 Drains : 



Surface drains 



Open ditch drains 



Covered drains or under drains . 

 Influence of covered drains on fertility 

 Location of drains : 



Grade 



Tile drains 



GLOSSARY 



