CHAPTER 



XXII 



XXIII 



CONTENTS Continued 



PAGE 



Texture and its effects Structure of soils 

 Structure and tilth Erosion Problems and ex- 

 periments. 



SOIL FERTILITY AND PLANT GROWTH 314 



Plant food and soil fertility Loss of fertility 

 Maintaining fertility Barnyard manure as a 

 fertilizer Preventing loss from manure Appli- 

 cation to soil Green manuring Commercial fer- 

 tilizers Use of lime on soils Crop rotation and 

 fertility. 



SOIL MOISTURE 331 



Forms of soil water Capacity of soils for capil- 

 lary water Tillage and soil water Soil drainage 

 Surface and tile drains Topics for investiga- 

 tion Soil demonstrations Soil play contests 

 Club work. 



PART IV. FARM ANIMALS 



XXIV FARM ANIMALS AND AGRICULTURE 344 



Work animals Animals that supply food Other 

 animal products Topics for investigation. 



XXV CATTLE 351 



Dairy cattle Profitable and unprofitable cows 

 The dairy type Selecting dairy cows by milk 

 tests Dairy breeds Feeding for milk production 

 Producing clean milk Beef breeds Judging 

 cattle Tuberculosis in cattle Topics for investi- 

 gation Demonstrations with cattle Play con- 

 tests Club projects. 



XXVI HORSES 376 



The horse-raising states Classes of horses 

 Breeds Judging horses Common defects of 

 horses Care and training Feeding : work ra- 

 tions Topics for investigation Demonstrations 

 with horses Play contests Club projects. 



