82 



CANAVALIA ENSIFORMIS (jACK BEAN) 



Percentage Composition of Ash. 



The composition of the crops from the respective sowings 

 was as follows^ : — 



kilos 



Neglecting other elements derived exclusively from the 

 soil, this gives an average of 28 kilos of nitrogen, which 

 is about the amount contained in 6 tons (metric) of farmyard 

 manure with nitrogen in the proportion of 0-5 per cent. 



The figures given are foy a crop from one aipent ( = 0-422 hectare). 



