260 



kilos of phosphoric acid; 24-876 kilos of potash, 

 3*325 kilos of lime. 



VI. Quantities of nutritive materials removed by. the 

 crop per year and per 'hectare (which it would be 

 necessary to return in the form of manure if Ijie 

 leaves, waste from the manufacture of palm oil, 

 stalks, shells and cake were not returned to the 

 soil). 



Total result: 16 kilos of nitrogen; 33*125 kilos 

 of phosphoric acid; 12*750 kilos of potash; and 

 4*3375 kilos of lime. 



VII. Total quantities of nutritive materials to be returned 

 to the soil per year per hectare. 



Total result: 141*701 kilos of nitrogen; 106*765 

 kilos of phosphoric acid; 203*328 kilos of potash; 

 and 13*580 kilos of lime. 



VIII. Total quantities of nutritive materials taken up per 

 hectare per year, adopting the averages of Adam. 



Total result: 173*826 kilos of nitrogen; 180*515 

 kilos of phosphoric acid; 305*328 kilos of potash; 

 and 29*068 kilos of lime. 



IX. Total quantities of nutritive materials taken up per 

 hectare per year, adopting the averages of A. 

 Hallet. 



Total result: 239*576 kilos of nitrogen; 334,890 

 kilos of phosphoric acid; 44*728 kilos of potash; 

 and 56*868 kilos of lime. 



GRAINES DE TRICHILIA OU MAFOURAIRES DU SUDAN 

 NIGERIEN. 



Par P. AMMANN, 

 Chef de Service chimique au Jardin colonial, 



ET 

 J. VuiLLET, 



Directeur de V Agriculture dans le Haut Senegal Niger. 1 



[ABSTRACT.] 



On sait que les Trichilias ne sont pas inconnues au point 

 de vue commercial, puis que le Mozambique exporte annuelle- 

 ment environ 2,000 tonnes de graines du Trichilia, regues a 

 Marseille sous le nom de " Mafouraire." 



1 This note was presented to the Congress by M. Prudhomme, 

 directeur du Jardin colonial, on behalf of the authors. 



