THE FARMER'S MAGAZINE. 



395 



trefoil. Thus, then, the very interesting question is 

 here raised': Were these circumstances to be regarded 

 as peculiar to the ammoniacal manuring of grass land for 

 three consecutive seasons ? or were they only casual ? 

 On this inquiry the experiments remaining for examina- 

 tion are extremely instructive. They are three in 

 number, and consist of ono trial where farmyard dung 

 was supplemented with ammoniacal salts, and other 

 two where the ajiplied mixed minerals also had the 

 same kinds of ammoniacal substances in addition. These 

 shall now be severally tabulated ; 



Table IX. — Showing the Results of the Experiment with 

 14 tons of Farmi/ard Manure, supplemented with lOOlba. 

 each of Sulp/iale and Muriate of Ammonia, contrasted 

 with the Results of the sarae Cinaatity of Farm Dung 

 alone. 



GuAMiNEOus Produce. 



Mean annual produce of Plol 

 No, 17, manured with 14 

 tons of dung, and lOOlbs 

 each of sulphate and mu- 

 riate of ammonia 



Mean annual produce of Plot 

 No. 16, manured with 14 

 tons of duug alone 



Choice 

 Species. 



Cwt. 



15 



22 



Decrease of gooJ species, \ 

 from the ammonia used J 

 Increase of inferior species . . 

 Total increase 



Inferior 

 Species. 



Cvrt. 



23.1 

 13 



lOi 



Totals. 



Cwt. 



38^ 

 35 



34 



The unhappy consequences of supplementing home- 

 made manure (which used alone had produced the most 

 benelicial effects) with ammoniacal salts were, then, sim' 

 ply these : not only to increase the total yield no mor« 

 than 5^ cwt,, but to nearly double the proportion of poor 

 herbage, striking ofl", at the same time, one-third part 

 of the yield of the good kinds. The augmented species 

 were those pests of the meadow, Yorkshire fog and 

 knot-grass ; the diminished ones were the pre-eminently 

 excellent rye-grass, &xid the scarcely less valuable smooth 

 meadow-grass. 



Table X. — Showing the result of manuring with Ammoniacal 

 iSalts Jointly with Mineral Manures, compared with the 

 results of Mineral Manures alone. 



Table XI. — Showing the result of manuring with Ammoniacal 

 Szlts in doubled quantity, jointly with Mineral Manures, 

 compared with the results of Mineral Manures alone. 



Total increase . . 



38 



Total increase 



34 



What, then, is the answer which these tables furnish 

 to the question already put, whether there is reason to 

 believe that the exhibition of ammoniacal manure is con- 

 stitutionally characterised, by inducing a profuse, but 

 coarse gramineous herbage ? Why this, that used alone 

 at Rothamsted, it was so ; that used with farm-yard ma- 

 nure, it was so ; that ivith mineral manures in one pro- 

 portion of admixture, it was so ; that tcith mineral ma- 

 nures in another proportion, the augmentation, good 

 and bad, was equal ; while, on the other hand, farm- 

 yard mantire and mineral manure, esich administered 

 alone, played the very reverse part, since they both 

 discouraged the inferior, and signally fostered the 

 choice kinds. 



Let us next consider the experimental results of the 

 various manurings on the leguminous vegetation of the 

 experimental meadow ; and, for the sake of brevity, the 

 whole instances shall be comprised in one table. 



Table XII. — Showing the Effects q( the JVon- ammoniacal and 

 Ammoniacal Manures on the Leguminous Herbage. 



Manures. 



Produce where 

 iO ammonia 

 salts used. 



1. Manure containing no Am- 

 moniacal Salt. 



Mixed minerals alone .. 



Farm-yard dung alone 

 2. Ammoniacal Manures. 



Sulphate and muriate of "I 

 ammonia alone . . J 



Sulphate and muriate ofl 

 ammonia jointly with > 

 minerals.. .. ..J 



Sulphate and muriate ofl 

 ammonia in double quan- > 

 tity, jointly with minerals J 



Sulphate and muriate of") 

 ammonia jointly with ^ 

 farm-yard dung.. j 



3. Unmanured. 



Produce of the unmanured 1 

 ploti .. ..J 



Choice Infr. 

 species, species. 



cwt, lb. cwt, lb. 



6 9 



76 



1 55 



90 



80 53 



cwt. lb. 



Produce when 



ammonia salt! 



used. 



Choice Infr. 

 species, species. 





 

 25 



cwt. lb. 



86 

 







70 



