Contents xiii 



MODIFYING INFLUENCES OF VARIOUS ENVIRON- 

 MENTAL FACTORS UPON MINERAL NUTRITION 



Light as a Modifying Influence on the Mineral Nutrition of 

 Plants 3 89 



Robert B. Withrow, Smithsonian Institution 



Soil Moisture and the Mineral Nutrition of Plants 411 



C. H. Wadleigh and L. A. Richards, U. S. Depart- 

 ment of Agriculture, Riverside, California 



Environmental Influences on the Growth of Sugar Cane 451 



Harry F. Clements, Castle & Cooke, Ltd., University 

 of Hawaii, and Hawaiian Commercial and Sugar 

 Company 



