Principles of Soil Management 



BY DR. T. L. LYON and PROFESSOR E. O. PIPPIN 



(Rural Text-book Series) 



Cloth, III., i2mo, $1.75 



The volume is a complete and comprehensive study of everything relat- 

 ing to soils and soil management. The material is arranged under three 

 general heads of (i) the soil as a medium for root development, (2) the 

 soil as a reservoir for water and (3) plant nutrients of the sol;. 



" As a book indispensable to the teacher of agriculture, the intelligent 

 farmer and student of farming, this is recommended." School Journal. 



"... explicit and clear, and will undoubtedly prove a valuable refer- 

 ence book for all students of soils." Industrialist. 



" Complicated questions of farm management and conservation of lands 

 are described with care, but, at the same time, with a lucidity which will 

 gain for the book an entrance into homes of many practical farmers." 

 Philadelphia North American. 



" An exhaustive and carefully prepared volume." Suburban Life. 



" It is one of the best books yet produced for college work on the study 

 of soils." School Review. 



Plant Physiology with special reference to 

 Plant Production 



BY DR. B. M. DUGGAR 



III., dec. cloth, i2mo, $1.60 



In this book the author discusses the life relations of plants and crops 

 from a fundamental point of view. The important physiological activities 

 of the plan are demonstrated experimentally, and the practices of the 

 crop-grower are reviewed from this standpoint. Some of the special 

 topics that are considered are as follows : The relation of the plant and 

 the crop to water; the relation to soil nutrients, stimulants and inhibiting 

 agents; the relation to light and air; the relation to heat and cold; the 

 Delation to the disease environment. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



