LippiNcoTT's Farm Manuals 



EDITED BY K. C. DAVIS, Ph.D. 



PRODUCTIVE SOILS 



THE FUNDAMENTALS OF SUCCESSFUL SOIL 

 MANAGEMENT AND PROFITABLE CROP 



PRODUCTION 



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 



23S ILLUSTRATIONS IN THE TEXT 



"If vain our toil, 

 We ought to blame the culture, not the^oil." 



'^JOSB^Essay on Man 



PHILADELPHIA & LONDON 

 J. B. LIPPINCOTT COMPANY 



