CANAVALIA ENSIFORMIS (jACK BEAN) 79. 



Xatuially, when the Jack Bean is left to ripen, the leaves 

 on the stem wither, and when the remainder of the crop 

 is ploughed in the amount of fertihzing matter is not so 

 large, especially as the seeds and shells have been gathered, 

 and are not returned to the soil ; at the same time, if the 

 seeds and shells are consumed by the beasts working on 

 the plantation, there is only a redistribution of fertility, for 

 if the manure produced be not used on the same spot, at 

 least it will be returned to the soil of the estate. 



From this point of view, then, it is useful to know the- 

 mineral composition of the pods, and we append tables, 

 showing the results of analyses in each case : — 



Percentage Composition of Ash. 



Se'eds Husks 



Percentage Composition of the Ripe Pod. 



Seeds Husks 



The following table gives the distribution of mineral 

 elements in the seed and shell for loo kilos of full pods 

 (58 kilos seeds and 42 kilos shells). 



