" The first farmer was the first man, and all historic 

 nobility rests on possession and use of land." 



EMERSON. 



LIPPINCOTT'S 



FARM MANUALS 



EDITED BY 



KARY C. DAVIS, PH.D. 



PROFESSOR OF AGRICULTURE, KNAPP SCHOOL OF COUNTRY LIFE, GEORGE PEABODY 



COLLEGE FOR TEACHERS, NASHVILLE, TENNESSEE; AUTHOR OF 



PRODUCTIVE FARMING, ETC. 



PRODUCTIVE SOILS 



BY WILBERT WALTER WEIR, M.S. 



FORMERLY ASSISTANT PROFESSOR OF SOILS, FIELD MAN, WISCONSIN STATE SOILS 



LABORATORY AND SOIL EXTENSION SERVICE, COLLEGE OF AGRICULTURE, 



UNIVERSITY OF WISCONSIN 



