CONTENTS 



PAGE 



Review of experiments elsewhere 247 



Experiments at Cornell University 250 



Soils and methods used 250 



Immediate effect of heat on certain constituents of these soils 251 



Changes occurring in steamed soils on standing 252 



Soil productiveness as affected by steaming 255 



Effect of cropping on the soluble matter of steamed soils 261 



Effect of an infusion of an unsteamed soil on a steamed soil 263 



Growth of wheat plants on steamed soil when planted four months after 



steaming . 271 



Summary • 272 



245 



