CONTENTS. 7 



cms to vegetation. 69, Peroxide of Iron Its composition Uses 

 in soils Effect of too much How to correct it, and effects. 

 70, Sulphate of Iron How formed Too much hurtful How 

 corrected Iron pyrites useful. 70, Potassium Its properties- 

 Oxidizes readily Forms caustic potash. 71, Potasli Its proper- 

 ties Importance to plants How and where found in nature 

 72, Potash from plant and wood ashes Wood ashes as manure. 

 78, Sodium Its propertfes Forms caustic soda Soda now made 

 from common salt. 74, Nitrate of Soda Where found Its 

 vises in soils Soda in plants Cheapest source of it Common 

 Salt Its composition. 75, Action of salt in soils Injurious to 

 some plants and trees Exterminates insects and worms How 

 much wheat requires. 



CHAPTER III. 



COMPOSITION OF PLANTS, AND KINDS AND AMOUNT OF MANURES 



REQUIRED. (Page 77-104.) 



77, Elements vary but little in plants of same kind Effects, if 

 not so First lesson of farmers Popular idea of action of ma- 

 nure. 79, Potasli, Silicon, and Lime Plants. 80, Remarks on. 

 81, Importance of studying the tables. 82, Table of composition 

 of plants. 83, Albumen and Gluten Their uses Starch and 

 Gum Their uses and mode of action. 84, Woody fibre Of no 

 use as food Theory of fattening. 85, Table of inorganic ele- 

 ments of plants A key to application of fertilizers Remarks on 

 table. 86, Composition of wheat and straw Remarks Ash of 

 plants uniform. 88, Crops on ordinary land. 89, English far- 

 mers. 89, Wheat Analysis of grain and straw Remarks. 90, 

 Indian Corn Analysis of Remarks. 91, Rye Analysis of 

 Remarks. 92, Oats Analysis of Remarks. 93, Barley 

 Analysis of Remarks, 94, Buckwheat Analysis of Remarks. 

 94, Potatoes Analysis of Remarks. 95, Clover Hay An- 

 alysis of Remarks. 96, Tobacco and Cotton Analysis of Re- 

 marks. 98, What should be applied to each crop Average crop 

 "m thirty States In Pennsylvania In South Carolina. 99, Re- 

 marks. 100, What reader should have learned. 101, What 

 has been raised in four years What was taken from the soil 

 What will re'store it. 102, Bad effects of overcropping in United 

 States and West Indies. 



