Plant Physiology 



By 



B. M. DUGGAR 

 Professor of Plant Physiology in Cornell Univereity 



Cloth, 12mo, $1.60 nei 



FROM THE PREFACE 



" The engineer who does not understand his machine cannot expect 

 to get effective work out of it. He shovM know its intimate structure, 

 what work it can perform under all conditions, and how it may be 

 controlled. In the same way the plant producer who knows the struc- 

 ture of the plant and its behavior is provided with the means of inter- 

 preting the effects of conditions upon the organism. The plant is a 

 delicate physical, chemical, and living mechanism and as such is 

 responsive to practically all kinds of stimuli." 



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

 crops from a fundamental point of view. The important physio- 

 logical activities of the plant are demonstrated experimentally, 

 and the requirements of the agricultural crop examined as far as 

 practicable from the point of view of physiology. The main agri- 

 cultural and horticultural practices of the crop grower, so far as 

 they involve the plant itself, are reviewed, either with the purpose 

 of explaining the scientific principles involved or of offering an 

 opinion on them. Laboratory and field experiments and general 

 observations are drawn on in these discussions. 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 relation to the disease environment. 



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THE MACMILLAN COMPANY 



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