MANURES. 71 



No. 2, manure cross-ploughed in, . . $104 6C} 



No. 1, manure ploughed in, . . . 98 13 



No. 3, manure harrowed in, . . . 88 26 



No. 4, manure left on the surface, . . 86 40 



In Mr. Leonard's second experiment, commencing in 1861, 

 the order and value per acre, were : 



No. 1, manure ploughed in, . . . . $142 66 



No. 2, manure cross-ploughed in, . . 135 86 



No. 3, manure harrowed in, . . . 132 27 



No. 4, manure left on the surface, . . 128 40 



In Mr. Leonard's third experiment, commencing in 1862, the 

 order and value were: 



No. 2, manure cross-ploughed in, . . $136 80 



No. 3, manure harrowed in, . . . 130 56 



No. 1, manure ploughed in, . . . 119 04 



No. 4, manure on the surface, . . . 112 00 



In Mr. Benson's experiment, commencing in 1861, the order 

 and value were : 



No. 3, manure harrowed in, , . ' . $124 40 



No. 2, manure cross-ploughed in, . . 123 85 



No. 1, manure ploughed in, . . . 120 90 



No. 4, manure on the surface, . . . 98 20 



Perhaps no more satisfactory course can be pursued, with 

 reference to results so various than that of reducing them to an 

 average. This course is favored by the consideration that the 

 weather, which, doubtless, had some influence on these results, 

 can never be anticipated, except to the extent indicated by the 

 mean of previous years. 



The average value, per acre, of the first crop in rotation, corn, 

 in the four experiments, was : 



No. 2, manure cross-ploughed in, . . ' $66 76 



No. 1, manure ploughed in, . . . 66 27 



No. 3, manure harrowed in, . . . 62 87 ^ 



No. 4, manure on the surface, . . . 55 50 



