(12) INSTRUCTIONS CONCERNING LABORATORY WORK IN SOILS (Con.) 



REFERENCE BOOKS 



Soils Fletcher. 



The Soil Hall. 



Agriculture, Vol. I Brooks. 



Soils Burkett. 



Soils Hilgard. 



Physics of Agriculture King. 



Soil Management King. 



Farmers of Forty Centuries King. 



Rocks, Rock Weathering and Soil Formation. . .Merrill. 



Rocks and Soils Stockbridge. 



Physical Properties of Soil Warington. 



The Fertility of the Land Roberts. 



Irrigation Farming Wilcox. 



Soil Culture Manual Campbell. 



Dry Farming Widtsoe. 



Engineering for Land Drainage Elliot. 



Fertilizers and Crops VanSlyke. 



Soil Fertility and Permanent Agriculture Hopkins. 



Soils Lyon and Fippin. 



Bacteria in Relation to Country Life Lipman. 



Soils of the United States Bulletin 96, U. S. 



Bureau of Soils. 



"If a man can write a better book, preach a better sermon, or make a 

 better mousetrap than his neighbor, though he buikl his house in the woods, 

 the world will make a beaten track to his door." 



