WllK.VT .SOILS OK llil-. .\I.i;.\.\Nl)KI.\ DIXISIOX. _> I 7 



IMlNSUAI. l\i:oiMKi:.\lKNTS ()|- \\'llK.\T SoiLS. 



Comparing- the results of the foregoing mechanical analyses 

 of the Alexandria .soils with what is known regarding the best 

 wheat areas and the ])hysical composition of soils investigated 

 in the United States, one cannot regard the former as in all 

 respects ideal for wheat cultivation. They do not contain the 

 proportions of clay and humus usually regarded as indispensable 

 for wheat soils, and incline more t(^ the light and sandy nature 

 which is less suited for the i)ur])ose.* It is true that soils ap- 

 ])roximating in com])osition e\en to the coarser Alexandria soils 

 are used for wheat culti\ation ; and that soils of the type of 

 Nos. 5, 7, y and 17 may be placed alongside even lig^hter soils 

 satisfactorily used for wheat in America. Thus No. 7 is some- 

 what heavier (i.e., is physically of finer grain ) than the Clyde 

 sand, in the State of Michigan, described by the United States 

 Soil Survey, as mav be seen from the following: — 



ERRATA IN JANUARY NUMBER. 



Page 216, 4th and 5th lines from bottom. For " and these 

 all read " fhf j^asttwo of^which " ^^_ ^__ 



.\ convenient method of classifying- the cultivated Alexandria 

 soils examined according to their mechanical analysis is the 

 following : — 



* See Ingle: " Elementary .\yricultur:il Cheniistr\ (I9I3>. 

 t United States Soil Survey Field Book (1906), 156. 



