c 



iriTRR OF TRANSMITTAL. 



Porto Rico Agriculturai. Experiment Station, 



Mayaguez, P. R., Ffhruary 13, 1914. 

 Sir: I have the honor to transmit herewith a manuscript hy P. L. 

 Gile and C. N. Ageton on The Effect of Strongly Calcareous .Soils on 

 the Growth and Ash Composition of Certain Plants. In plant pro- 

 duction we have tried and measured arid weighed many results 

 obtained bj^ methods more or less uncertain and inexact. It is 

 becoming increasingly evident that we must go farther back and 

 seek for principles in order that our efforts may lead to more exact 

 and concordant returns. This bulletin throws some light on the 

 relation of certain elements in plant growth and will prove of value 

 in further researches. 



I recommend that tliis manuscript be published as Bidletin Ifi of 

 this station. 



Respect fullv, 



D. W. May, 

 Special Agent in Charge. 

 Dr. A. C. True, 



Director Office of Experiment Station/^, 



U. S. Department of AgricvJtiire, Washington, D. C. 



Recommended for publicaticni. : • 



A. C. True, Director. "^ , 



Pubhcation authorized. 

 D. F. Houston, 



Secretary of Agriculture. 

 (3) 



