2O FEEDING FARM ANIMALS 



What the Plant Has Done. The relation between 

 soil and plant is now apparent. The soil elements 

 have been taken into the plant. From now on they 

 lose their individual identity and, united in various 

 ways, they now become organized compounds. 

 They are no longer carbon, hydrogen and oxygen, 

 but starch or sugar, or oil ; or, if nitrogen and sul- 

 phur are added, they become protein compounds. 

 The plant has now fulfilled its destiny and is ready 

 to be used as food for the support of animal life. 



Elements and Their Symbols. For the sake of 

 brevity the symbols or letters representing the 

 various agricultural elements are often used, and 

 for the purpose of becoming acquainted with them 

 the list below is given: 



O Oxygen P Phosphorus 



H Hydrogen K Potassium 



N Nitrogen Mg Magnesium 



C Carbon Al Aluminum 



Cl Chlorine Fe Iron 



Na Sodium Si Silicon 



S Sulphur Ca Calcium 



