144 



PHASEOLUS HELVOLUS (aMBERIQUE) 



The composition of the total crop is as follows 



Silica ... 

 Chlorine 



Sulphuric acid ... 

 Phosphoric acid... 

 Lime ... 

 Magnesia 

 Potash... 

 Soda ... 

 Oxide of iron 

 Carbonic acid, &c. 



Total mineral matter 

 Nitrogen 



Weight of the green crop. 

 ,, „ dry ,, • 



4-637 kilos 



3-376 ,, 



2-836 „ 



4-952 ,, 



17-640 ,, 



8.058 „ 



20-977 „ 



0-180 ,, 



2-476 ,► 



20-392 ,, 



85-530 

 18-91 

 4,500 

 922-8 



After harvesting the seeds there remains on the tields 

 3,008 kilos of green crop and 675 kilos of dry, giving" 

 8*72 kilos of nitrogen and 58-974 kilos total mineral matters. 



Silica ... 

 Chlorine 



Sulphuric acid ... 

 Phosphoric acid 

 Lime ... 

 Magnesia 

 Potash 

 Soda ... 

 Oxide of iron 

 Carbonic acid, &c. 



4-423 kilos 



3-279 ,. 



2-016 ,, 



1-535 ., 



15-857 ,, 



6-049 .. 



10-379 •, 



0-391 ,. 



1-692 „ 



13-353 >> 



58-974 ., 



We have had occasion to analyse the composition of 

 green varieties which differ somewhat from the vellow as 

 regards potash. The green seems to require a large quantity 

 of this element; both thrive equally well in the same soils. 



