256 THE AMERICAN FARMER. 



Experiments with Different Manures on Permanent Meadow Land. 



The land has probably been laid down with grass for some centuries. No fresh seed has been arti 

 ficially sown within the last forty years certainly; nor is there record of any having beeen sown since 

 the grass was first laid down. The experiments commenced in 1856, at which time the character of the 

 herbage appeared uniform over all the plots. Excepting as explained in the table and in the foot-notes, 

 the same description of manure has been applied, year after year, to the same plot. (Area under experi 

 ment, about seven acres.) 



* &quot; Ammonia salts&quot; in all cases equal parts Sulphate and Muriate of Ammonia of Commerce. 1 The &quot;Superphosphate 



of Lime &quot; is, in all cases, made from 200 Ibs. Bone-ash 150 Ibs. Sulphuric Acid Sp. gr. 1.7 (and water). { Plots 6, 8 and 10 had 



besides the Manures specified, 2,00*) Ibs. Sawdust per acre per annum for the first seven years, 1856-1862, but without effect. 

 200 Ibs. 1856-1863 inclusive.- 



did not commence until 1862.- 

 1 Ammonia-salts.&quot; 



II 500 Ibs. in 1862 and I80&- ** Only 400 Ibs. in 1859-60-&quot;61. -ft The application of Silicates 

 -$t 550 Ibs. Nitrate of Soda is reckoned to contain the same amount of Nitrogen as 400 Ibs. of 



&quot;With regard to these experiments, Mr. Lawes says: 



&quot;It will be observed that of the two unmanured acres, No. 3 and No. 12, one always 

 gives rather more produce than the other, the average produce of one over the whole period 

 of twenty years being 2,383 pounds, and of the other 2,686 pounds; for reasons which 

 we have fully gone into in the original paper, we have considered it advisable to adopt the 

 produce of Plot 3 instead of the mean of 3 and 12 as our standard of unmanured produce; 



