xii Contents 



MECHANISM OF ENTRY AND TRANSLOCATION 

 OF MINERAL NUTRIENTS IN PLANTS 



The Nature of the Process of Inorganic Solute Accumulation 



in Roots 187 



T. C. Broyer, University of California 



The Mechanism of Ion Absorption 251 



Hans Burstrom, University of Lund, Sweden 



The Translocation of Minerals in Plants 261 



O. Biddulph, State College of Washington 



SOME FIELD PROBLEMS IN PLANT NUTRITION 



Control of Nitrogen Effects on Mcintosh Apple Trees in New 



York 279 



Damon Boynton, Cornell University 



Production of Vegetable Crops for the Canning Industry 295 



Jackson B. Hester, Campbell Soup Company 



ROLE OF MINERALS IN PLANT NUTRITION 



Growth and Function as Criteria in Determining the Essential 

 Nature of Inorganic Nutrients 313 



Daniel I. Arnon, University of California 



Mineral Nutrition in Relation to the Ontogeny of Plants 343 



W. F. Loehwing, State University of Iowa 



Correlations between Protein-Carbohydrate Metabolism and 

 Mineral Deficiencies in Plants 3 59 



Robert A. Steinberg, U. S. Department of Agricul- 

 ture, Beltsville, Maryland 



