EFFECT OF GYrSUM ON CLOVER. 343 



not only a larger mass of stems, but, as in the case of tlie 

 sulphate of magnesia plot, also of flowers and leaves. 

 The entire crop, per morgen, was, — 



Flowers 



Leaves 



Stems 



2160 „ 30G0 „ 3240 



The quantity of most of the ash constituents was found 

 larger, nearly in the same proportion as the produce was 

 greater. Phosphoric and sulphuric acids, however, 

 showed in this respect a marked difference from the 

 other ash-constituents, inasmuch as the quantity of these 

 two substances was both absolutely and relatively larger 

 in the clover from the manured plots. 



The ash of the air-diied clover-hay amounted to — 



The dressing with the sulphates had checked the deve- 

 lopement of the flowers, and also that of the fruit ; and 

 it is evident that, though a higher crop of stems and 

 leaves may be obtained by the use of these agents from a 

 given surface, the result is not the same as regards the 

 seeds. With an increase of flowers, leaves, and stems in 

 the same ratio as on the unmanured plot, the two mor- 

 gens of ground, dressed severally with gy^isum and 

 sulphate of magnesia, ought to have produced more tlian 

 600 lbs. of flowers each ; whereas, compared with the 



