X CONTENTS 



experiments Horse manure Cow manure Sheep 

 manure Poultry manure Rate of application Liquid 

 manure The functions of lime Commercial fertilizers 

 Sources of nitrogen Sources of phosphoric acid 

 Sources of potash. 



CHAPTER V 



SOIL PREPARATION 70 



Ideal conditions Changing soils Composting Manur- 

 ing in the field Green manuring Manuring in the 

 greenhouse Drying greenhouse soils Summer mulch- 

 ing Plowing and harrowing Spading and raking 

 Applying lime Applying fertilizers. 



CHAPTER VI 

 SOIL STERILIZATION 85 



The necessity of sterilization Methods Steam steri- 

 lization Temperature required Time required Boiler 

 and pressure Preparing soil Devices for sterilizing 

 Boxes Pans Perforated pipe Perforated pegs Tile 

 Frequency of sterilization After treatment Forma- 

 lin sterilization Strength of solution Application 

 Cost Hot water sterilization 



CHAPTER VII 



INSECT ENEMIES AND THEIR CONTROL 103 



The insect problem Preventive measures The rotation 

 of crops Steam sterilization Tobacco fumigation 

 Tobacco preparations Hydrocyanic gas fumigation 

 Miscellaneous insecticides The spraying apparatus 

 Nematodes (Heterodera radicicola) Aphis White fiy 

 (Aleyrodes vaporariorum) Appearance of infested 

 plants Red spider (Tetranychus telarius, Linn). 



CHAPTER VIII 



DISEASES AND THEIR CONTROL 127 



An important factor Sanitation Soil selection Ma- 

 nure selection Infected plants Influence of light In- 

 fluence of moisture Influence of temperature Vigor 

 of growth Crop rotation Resistant varieties or strains 

 Steam sterilization Formalin sterilization Summer 

 mulch Spraying Bordeaux mixture Ammoniacal 

 copper carbonate Potassium sulphide or liver of sul- 

 phur Sulphur. 



