COMPOSITION OF SOIL AS ATFECTISG SORGHTM. 



183 



In view of the above facts, it is not improbable that a similar ex- 

 planation will suffice for the remarkable results obtained at Rio 

 Grande, N. J. 



In the following table, the crop of stalks produced, with the per 

 cents of lime and magnesia in the several soils, is given, for purpose 

 of comparison with ratio of lime to magnesia. 



It will be remembered, that, while each of the above soils had re- 

 ceived an application of 300 pounds of Peruvian guano per acre, the 

 soils C, D, E, and F, had, in addition, received 30 bushels of lime per 

 acre. It is also very interesting to observe that, as the relative amount 

 of the magnesia compared with lime in the above soils fell off the crop 

 of cane increased. 



For purposes of comparison, the tons of stalks produced per acre, 

 with the per cents of the lime and magnesia, and their ratio, is given 

 for the other soils analvzed : 



In the above list, the order of arrangement is according to the ratio 

 of lime to magnesia, and it will be seen that the crop from soil X is 

 the only one which is fairly exceptional to the conclusions laid down 

 by Dr. Phipson in his examination of sugar-cane soils. The ratios of 

 L and I are almost identical, and there is but a ton difference in the 

 yield per acre ; also, the actual amount of lime present in I is greater 

 than that in L. 



At the several conventions of sorghum growers, the discussion of the 

 SOU best suited to the growrh of sorghum has been areneral ; but the 



