On the Growth of Barley by different 3Ianures, Sf-e. 483 



ever, seldom so favourable at harvest as from appearances it 

 previously promised to be. 



Bearing in mind these general tendencies of effect of the 

 different manures, which, owing to the incidental though uncon- 

 trollable fluctuations of season, are of course not so exactly 

 numerically reflected as they would be under constant and 

 favourable conditions of climate, let us see what really are the 

 comparative results which the figures show ? 



In the left hand division of Table IX. Avill be found the 

 average annual effects of the different manures upon the quality 

 of the produce. These are indicated by the proportion of corn 

 in the total produce, the proportion of dressed corn in total corny 

 and the iceight per bushel of the dressed corn. In the right hand, 

 division of the Table are given the particulars of quantity ; 

 namely, the average annual bushels of corn per acre, and the 

 amount in lbs. per acre, resjiectively of the total corn, of the 

 straw, and of total produce (corn and straw together). 



There are also given under the head of particulars of quantity, 

 the average annual increase of corn and of straw, &c., by different 

 manui'es, compared with the produce of others adopted as 

 standards. 



Looking first to the columns of quality, it is seen that the 

 addition of the ashes, which do not increase the total produce, 

 gives a tendency to an increased pi'oportion of corn, a somewhat 

 larger proportion of dressed corn, and a slightly higher average 

 weight per bushel of dressed corn when compared with the unma- 

 nured produce. Taking the same standard of comparison, the 

 farm-yard manure, probably because the crop was generally laid, 

 did not give a higher average proportion of total corn ; but the pro- 

 portion of dressed corn, and the weight per bushel of the dressed 

 corn, were somewhat higher. Comparing Series with Series, the 

 mineral manures alone gave higher qualities of produce in all 

 three respects than either the unmanured produce, or that of the 

 series with nitrogenous manures. The produce of the Series with 

 nitrogen =50 lbs. of ammonia per acre, was generally inferior in 

 the qualities enumerated to the unmanured produce : and that of 

 the Series with the nitrogen equal to 100 lbs. or more of ammonia 

 per acre, stands lower still in all these points of quality, depend- 

 ing as they do so materially on the standing up and favourable 

 maturing of the crop. 



Going a little more into detail, it is seen that where the 

 mineral manures were used alone, the superphosphate of lime 

 had a marked effect on the proportion of total corn ; and also upon 

 the perfection of that corn ; as indicated by the amount of the 

 dressed, in 100 of the total corn. The influence of the mineral 

 manures on the quality of the produce, and especially that of the 



