UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



AGRICULTURAL SCIENCES 



Vol. 1, No. 13, pp. 495-587 March 26, 1917 



EXPERIMENTS ON THE EFFECTS OF CON- 

 STITUENTS OF SOLID SMELTER 

 WASTES ON BARLEY GROWTH 

 IN POT CULTURES 



BY 



C. B. LIPMAN AND W. F. GEEIOKE 



LHSKAXT 

 NBW YORK 

 ISOTANICAL 



UAKOBM. 



CONTENTS 



PAGE 



Introduction 496 



Objects of the experiments 496 



Methods of the experiments 497 



Eesnlts of the experiments 499 



Color of leaves oOO 



Tillering 501 



Height of plants 503 



Germination of seeds 504 



Yields obtained 505 



Greenhouse soil (copper sulfate) 505 



Adobe soU (copper sulfate) 509 



Oakley soil (copper sulfate) 512 



Greenhouse soil (zine sulfate) 514 



Greenhouse soil (ferrous sulfate) 517 



Greenhouse soil (lead sulfate) 519 



Greenhouse soil (potash alum) 522 



Greenhouse soil (manganese sulfate) 525 



Greenhouse soil (manganese chloride) 529 



Comparison of our results ivith those of previous investigators 533 



Copper sulfate 533 



Zine sulfate 539 



Ferrous sulfate 541 



Lead sulfate 543 



Manganese sulfate and manganese chloride 544 



