132 TIMEHRI. 
Phosphoric acid experiments. 
Nitrogen and potash only 13'8 tons of canes per acre. 
Nitrogen, potash and superphosphates 14°9 eS = 
a . and mineral phosphates 14° M 
a Rs and slag phosphates 13°4 fe - 
Where using potash salts, the Antigua experiments 
are with plant canes in general accordance with those 
obtained in Barbados. Manures which contained potash 
during six series of experiments with plant canes, gave 
on the average 2} cwts. more sugar per acre than did 
manures containing nitrogen and phosphates but no 
potash. The results in 1896 were as follows :— 
Plant Canes. Ratoons, 
Not manured 23'9 I1°g tons of canes per acre 
Nitrogen and phosphates 24'5 ie ys aye ae 
Nitrogen, phosphates and potash 26'2 147s ” 
Here again we find an entirely different action upon 
plant canes and upon ratoons. 
Mr. WATTS when using superphosphate of lime to plant 
canes noted that additional amounts of superphosphate 
resulted in decreased yields, notin increased ones. The 
Colonial Company’s experiments, as I have already men- 
tioned, indicated a similar aétion, and unfavourable effeéts 
were very noticeable during the first series of the Barba- 
dos experiments. The results in Barbados were as 
follows :— 
Nitrogen and potash a. Me? .-31°6 tons of cane per acre 
» potash and 2 cwts. bie oheeanne mc Ly ia a A 
” » ya,/ rae ” +334 4 » ”» 
”? 9 ” 4 ” ” ec 3 1 ay ” 32 be ] 
Effeéts of this nature at times noticed when manurings 
containing superphosphate of lime have been used to the 
sngar cane, indicate the necessity of caution regarding 
the amounts of it applied per acre, 
OO 
