118 TIMEHRI. 
or less complete and scientific manners in several colo- 
nies and countries, among others, for instance, in Guade- 
loupe by BONAME, in British Guiana by the Colonial 
Company, in Barbados at the Dodd’s Botanic Station, 
in Louisiana at the Sugar Experiment Station, in British 
Guiana at the Botanic Gardens, in Mauritius by the 
Station Agronomique and in Antigua by Messrs. WATTS 
and SHEPHERD at Skerrett’s School. 
With the exception of the last mentioned, the ex- 
perimenters are all agreed as to the great importance of 
nitrogen in cane cultivation. In Guadeloupe, M. BONAME 
apparently aimed more at ascertaining the effeéts, if 
any, of the manures upon the composition of the 
juice of the canes than at the aétions of the manures 
in increasing the yield of the plants. It is difficult 
to draw any reliable conclusions as to the specific 
a€tions of the various constituents of the manures used 
in the more recent experiments conduéted by M. BONAME 
in Mauritius. 
The investigations at the Sugar Experiment Station in 
Louisiana are far more satisfactory in their results. They 
clearly point out the paramount importance of nitrogen 
as a constituent of cane manure, the importance of phos- 
phoric anhydride as a mineral constituent, and the faét 
that on soils such as the alluvial soils of Louisiana, 
potash is of little or no importance in manures for the 
sugar cane. Thus in the four crops reaped at Kenner, 
between 1886 and 18g0 the following were the average 
results :— 
No manure... iv ...13°6 tons of canes per acre. 
Mixed minerals... eee | ge par, * 
Mixed minerals and 24 lbs, Nitrogen 20° __,, ” ” 
” ” » 48lbs, Nitrogen 21°7 4, ” ” 
