B46 



Liming. 



[July, 



On July 31st the crop was cut and subsequently air-dried and 

 weighed. The results are shown in the following table : — 



Treatment 

 Limestone; 



m. 



Particles 

 -8 in. — iVi"- 



Particles 

 in.— 2V in. 



Particles 

 a^in-— T^in. 



Particles 

 below in. 



No. of Pots 



Wt. of air- 

 dried Cl'Op 

 in grms. - 



1. 2. 3. 



2-6 ; 2-5; 2-5; 



4. 5. 



3-3; 3-0; 



6. 7. 

 3-6; 3-2; 



8. 9. 

 4-7; 4-1; 



10. 11. 

 9-6; 11-0. 



As indicated in the illustration and figures given above, the 

 ground limestone of a degree of fineness below 1/100 in. bene- 

 fited the crop to a remarkable extent. With 1/25 in. to 1/100 in. 

 the benefit was slight, while in the case of the two coarsest 

 grades the effect was almost inappreciable. The pots were 

 allowed to remain without any further treatment to provide a 

 second crop. 



The second crop of trefoil was cut on November 29th. The 

 results are given below : — 





Control. 



Particles 

 8- ii^-— tV i°- 



Particles 

 tV in.— in. 



Particles 

 2Vin--TUoin. 



Particles 

 below in. 



No. of Pots 



Wt. of air- 

 dried crop 

 in grms. - 



1. 2. .3. 

 1-0; 1-2; 1-2; 



4. 5. 

 1-3; 1-4; 



6. 7. 

 1-3; 1-8; 



8. 9. 

 1-5; 1-7; 



10. 11. 



23 2 ; 24-3. 



The results given above indicate very clearly that the trefoil 

 did not respond to any appreciable extent to ground hmestone 

 which could not pass through the 1/100 in. mesh sieve. In 

 the case of the finest grade (below 1/100 in.) the effect upon 

 the crop was very marked. It should be observed that the 

 superiority of the finest grade was even more striking with 

 the second crop than with the first. It is thus evident that 

 particles above 1/100 in. not only failed to have any appreciable 

 immediate effect upon growth, but also did not succeed in 

 assisting the crop even several months after application. 

 Another feature of the experiment, of considerable interest from 

 the practical farmer's point of view, is the large number of 

 plants which perished during the first few weeks after germina- 

 tion, both in the control pots and in all the pots to which the 

 grades of hmestone above 1/100 in. were apphed. In the case 



