TABLE OF CONTENTS. Vll 



VII. WEEDS. 



PAGE 



Table of Noxious Weeds. L. 11. Dewey, Assistant Botanist 

 U. S. Department of Agriculture 94 



VIII. ENEMIES OF FARM CROPS. 



Treatments for Injurious Insects and Fungous Diseases of 

 Plants. Prof. E. S. Goff, of Wisconsin Experiment Station. 99 



Spraying Calendar loi 



A Cheap Orchard-spraying Outfit 104 



Prevention of Oats-smut 105 



The Formalin Treatment for the Prevention of the Smuts of 



Cereal Grains and of Potato Scab \cj 



Fighting the Chinch-bug by Means of Kerosene Emulsion loS 



IX. FORESTRY. 



Forestry for Farmers. Dr. B. E. Fernow, Director N. Y. State 



College of Forestry 109 



Number of Trees on an Acre 113 



Fuel Value and Specific Gravity of some of the More Important 



Woods of the United States 114 



Distance Table for Tree-planting 116 



States and Territories Observing Arbor Day, with Dates 117 



Forest-fire Laws in the United States 118 



X. MANURES AND FERTILIZERS. 



Manures and Fertilizers 122 



Approximate Losses of Fertilizing Materials in Different Sys- 

 tems of Farming 123 



Average Chemical Composition of American Soils 124 



Manurial Value of Feeding Stuffs 125 



Fertilizing Constituents of Feeding Stuffs and Farm Products.. 126 



Amount of Soil Ingredients Withdrawn by Various Crops 128 



Amount of Fertilizing Materials Contained in Different Crops 



Grown on One Acre , 129 



Farmyard IManure Required to Replace Ingredients Abstracted 



from the Soil by an Acre of Different Crops 130 



Amount and Quality of Manure Produced by Stock 130 



Composition, Amount, and Value of Manure Produced by Dif- 

 ferent Kinds of Farm Animals 131 



Quantities of Nitrogen and Ash Constituents Voided by Animals 131 



Percentage Composition of Commercial Fertilizing Materials 132 



Exhaustion of Fertilizers 134 



Equivalent Quantities of Fertilizing Materials 135 



Valuation of Manures and Fertilizers 136 



