Experiments icith Artificial Manure as Top-dressing. 227 



rainfall is about 23 inches, and the elevation above the sea some 

 600 feet. Dr. Voelcker has recently handed to me the preceding 

 analyses of the soils of the three fields referred to. 



This is the general composition of the three soils calculated 

 dry. 



No. 1 was drilled with barley during the first week in 

 April. Before the drill, with only a good harrowing between, I 

 had sown by Priest and Woolnough's broadcast Manure-drill 

 2 cwts. of superphosphate (Lawes's mineral), and 1 cwt. of Agri- 

 cultural salt. This crop followed a very inferior crop of white 

 turnips. Very little difference was apparent between this land and 

 those left unsown with the artificial manures until near harvest, 

 when it came into ear later, and was not ready for the scythe so 

 soon as the rest of the field. 



Table of Produce. 



Cost of manure per i of acre — s. 



5 cwt. of Lawes's superphosphate on farm . . . . 2 



i cwt. agricultural salt 



Cost of a^oplying manure per i of acre 



3 



s. 



Difference in favour of manured plot 8 



Less manure 3 



Total net profit per i of an acre . . 4 



11 



No. 2. Drilled with barley in the last week in March : pre- 

 vious to this, 2 cwts. of superphosphate, 2 cwts. of salt, 2 cwts. of 



Q 2 



