694 PLANT GROWTH AND PLANT COMMUNITIES 



Vlamis, J., 1953. "Acid Soil Infertility as Related to Soil-Solution and Solid-Phase 



Effects," Soil Sci. 75, 383. 

 Wiklander, L., 1955. "Cation and Anion Exchange Phenomena," in Bear, F. E., 



ed.. Chemistry of the Soil (N. Y., Reinhold). 

 Wiklander, L., 1957. "Plant Physiology," in Calmon, C, and Kressman, T. R. E., 



eds.. Ion Exchangers in Organic and Biochemistry (N. Y., Interscience ) . 

 Williams, D. E., and Coleman, N. T., 1950. "Cation Exchange Properties of Plant 



Root Surfaces," Plant, and Soil 2, 243. 

 Wynd, F. L., 1951. "Availability to Wheat Plants of Iron in Very Insoluble Glass 



Frits," Lloydia 14, 1. 



