TABLE OF CONTENTS 



Preface 5 



Introduction 11-16 



CHAPTER I. The Air 17 



How green leaved plants get food from the air. How plants get food 

 from the soil. The course of the soil-water in the plant. 



CHAPTER II. The Growth of a Seed 24 



The flower. The fruit. 



CHAPTER TIT. Plant Breeding 28 



Improving the cotton plant. cotton breeding. 



CHAPTER IV. The Soil 40 



Living soils and dead soils. How to determine what the soil needs. 



CHAPTER V. Plant Food 46 



CHAPTER VI. Sources of Fertilizing Materials 48 



Sources of nitrogen. Barnyard and stable manures. No need for 

 buying nitrogen. Leguminous plants the true source of nitrogen for 

 the farmer. 



CHAPTER VII. Phosphorus, Its Sources and Use in Plant Feeding 61 



Bone meal as a source of phosphoric acid. Thomas slag, slag meal, 

 basic slag as a source of phosphoric acid. Marls as a source of phos- 

 phoric acid. Phosphatic guano. The great phosphate rock deposits. 

 Some erroneous popular names. The value of insoluble phasphates. 



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