Experiments with different Top'Dressings upon Wheat. 103 
The nitrate of soda was a good commercial sample, as will be 
seen by the following analysis : — 
Composition of Nitrate of Soda used in these Top-Dressings, 
Water 3-427 
Chloride of sodium 1"184 
Pure nitrate of soda 94'210 
Sand and earth 1"179 
100-000 
Plot II. — Top-dressed April 15th, at the rate of 1^ cwt. of 
nitrate of soda and 3 cwt. of salt per acre, produced : — 
cwt qrs. lbs. 
Com, Head 52 6 
„ Tail 0 0 2 
5 2 8 
Straw .. 7 0 22 
Chaff 0 1 llj 
Cavings 0 0 16 
Produce per acre : — 
Com (head and tail) 41 bushels 36 lbs., at 60 lbs. per bushel. 
Straw (including chaff and cavings) 1 ton 9 cwt. 3 qrs. 2 lbs. 
In comparison with Plot I., the higher produce here obtained 
both in corn and straw more than repaid the additional outlay for 
the extra quantity of nitrate of soda and salt. 
Plot III.— Top-dressed, at the rate of 2 cwt. of nitrate of soda 
and 4 cwt. of salt per acre, produced : — 
2 '. cwt. qrs. lbs. 
Com, Head 5 3 10 
,, Tail 0 0 18i 
6 0 Oi 
Straw 7 1 23 
Chaff 0 1 0 
Cavings 0 0 23 
Produce per acre : — 
Corn (head and tail) 44 bushels 48 lbs. 
Straw (including chaff and cavings) 1 ton 10 cwt. 2 qrs. 16 lbs. 
A still more favourable result, then, was produced by adding 
again J cwt. of nitrate of soda and 1 cwt. of common salt per 
acre to the quantity of the same top-dressing used in the preceding 
experiments. 
Plot. IV. — Top-dressed with i cwt. of nitrate of soda alone, or 
at the fate of 2 cwt, per acre, produced — 
