CONTENTS 



PART I 



CHAPTER PAGE 



I. The Healthy Soil 3 



11. Sick Soils i6 



III. Treatment of Sick Soils .... 28 



PART II 



CULTURAL considerations 



TV. Light in Its Relation to Greenhouse 



Culture 53 



V. Moisture and Water Requirements 73 



VI. Breaking the Rest Period of Plants 86 



PART III 

 diseases of greenhouse vegetables 



VII. Nature of Plant Diseases ... 93 



VIII. Germination Troubles 104 



IX. Beet Diseases 114 



X. Cauliflower Diseases 122 



XI. Cucumber Diseases 133 



XII. Lettuce Diseases 145 



XIII. Mushroom Diseases 159 



XIV. Parsley Diseases 166 



XV. Radish Diseases 173 



XVI. Tomato Diseases 180 



