TO WHAT EXTENT SHOULD A SOIL BE LIMED. 375 



photograph was taken, see Plate XLV. which shows that the 

 development of pot No. II., was the best, next came No. III., 

 while that of No. IV. was exceedingly poor. 



On June 1 8th., the plants were cut and weighed in the fresh 

 state with the following results : — 



Cabbage. 



Rate of 

 CaO : MgO. 



Total weight of 

 seven plants. 



Weight of the 

 largest plant. 



Average 

 weight. 



No. 1. 



3 : i- 



37S Sr- 



130 gr. 



54 gr. 



No. II. 



2 : 1. 



475 g-- 



140 gr. 



68 gr. 



No. III. 



1 : 1. 



390 gr. 



100 gr. 



56 gr- 



No. IV. 



1 : 2. 



75 g r - 



45 gr- 



11 gr. 



It follows therefore that for cabbage the ratio of 2 : 1 between 

 the assimilable lime and the magnesia present in Pot No. II., 

 was far superior to the other ratios. 



Experiment wilh Buckwheat. 



On April 10th., buckwheat was sown, there being two series 

 of four pots each in eight of the pots, each pot receiving fifteen 

 seeds. On May 3rd., the number of equally well developed 

 shoots in both series, A and B, was reduced to eight. On May 

 5th., the flowers began to develop, but with different degrees of 

 rapidity as is seen from the following table : — 



Number of plants bearing (lowers. 



Buckwheat. 





Pot No. I. 

 CaO : MgO 

 3 : 1 



Pot No. II. 



CaO : MgO 

 2 : 1 



Tot No. III. 



CaO : MgO 

 1 : 1 



Pot No. IV. 

 CaO : MgO 

 1 ; 2 



May 9. 



A 1 | 

 1! 0 



A 2 

 \i 1 



A 1 



1! 0 



A 0 

 B 0 



„ II. 



A 2 



B 3 



A 5 

 B 4 



A 1 



B 2 



A 1 



B 2 



