130 TIMEHRI. 
potash in equivalent proportions was substituted in the 
manures for nitrate of soda. The results were as follows : 
Not LIMEp. LIMED, 
i - eae ‘ ; eae 
SULPHATE OF POTASH. iss see fs cance iol 
aa Tons. ae a Tons. 
Not manured ... os coe, 2205 27°95 
Nitrogen and superphosphate ... 31°9 30'5 
Nitrogen, superphosphate and 50 
lbs, potash salts ee owe et: °5 35°75 nil, 
Nitrogen, superphosphate and too 
lbs. potash salts pees gob) OOF 8 35'5 nil, 
Nitrogen, superphosphate and 150 
lbs. potash salts as eve + 32°05 105 35°85 nil. 
NITRATE OF POTASH. 
Not manured ... ae Ae Se ie 6 oy i 
Nitrate of soda.. ow av 20'E 33'5 
Nitrate of seen ao 28°05 nil, 31°95 nil, 
The increases on anh not limed due to the aétion of 
the sulphate of potash were small, and, on the whole, of 
very doubtful profit, whilst the absence of any increase 
where nitrate of potash was substituted for nitrate of 
soda causes us to pause in attributing the increases to 
the potash of the manures, | 
In Antigua for some years past, manurial experiments, 
have been conduéted by Messrs. WATTS and SHEPHERD, 
at Skerret’s School, with results which in one important 
point are in direé&t conflict with the majority of recorded 
experiments, Their results tend to show that the soil 
in which they worked contained sufficient available 
nitrogen for the needs of the cane plant, additions of 
nitrogen to plant canes either as sulphate of ammonia or 
as nitrate of soda being apparently either without effe& 
orelse injurious. Mr. WATTS shows that on an average 
