FERTILITY AND HOW TO MAINTAIN 53 



"Soils and Soil Fertility." Whitson and Walston. 



"The Fertility of the Land." Roberts. 



Kentucky Agricultural Expt. Station Bulletin 191 . "Teachings of Kentucky Agricultural 



Expt. Station Relative to Soil Fertility." 

 Farmers' Bulletins, U. S. Dept. of Agriculture: 



342. "Conservation of Soil Resources." 



406. "Soil Conservation." 



421. "The Control of Blowing Soils." 



446. "The Choice of Crops for Alkali Land." 



