viii CONTENTS 



Formulae for the Ecological Reaction of Crop Yields 326 



W.C. Visser, Instituut voor Cultuurtechnick en Waterhuishonding, 

 Wageningen, Netherlands 

 The Growth Rjesponse of Sugar Beet to Similar Irrigation 

 Cycles Under Different Weather Conditions 340 



B. Orchard, Rothamsted Experimental Station, Harpenden, Herts. 



Cropping Pattern and Water Eolations 356 



W. C. Visser, Institmit voor Cultuurtechnick en Waterhuishonding, 

 Wageningen, Netherlands 



Water Relations of Forest Trees 366 



E.E. Gaertner, Professional Agrologist, Petawara Forest, Chalk 

 River, Ontario, Canada 



