16 



shows the necessity of providing both drainage and irrigation in order 

 to fortify against unfavorable climatic conditions. 



TEXTURE OF TOBACCO SOILS. 



Samples of soils and subsoils were taken fi-om nearly every district 

 visited, and a portion of these were transmitted to the Bureau of Soils, 

 United States Department of Agriculture, for mechanical analyses. 

 The following table gives the results of the anal.yses, and indebtedness 

 to the Bureau of Soils is hereby acknowledged for its assistance in this 

 inatter : 



3Jeclianical aiiaJi/scs of soils and subsoils from typical tobacco fields in severed of 

 the principal fobacco-growine/ districts of Porto Rico. 



[FiiiL' earth.] 



