260 
kilos of phosphoric acid; 24°876 kilos of potash, 
3°325 kilos of lime. 
V1I.—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 the 
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: 173826 kilos of nitrogen; 180°515 
kilos of phosphoric acid; 305°328 kilos of potash; 
and 29068 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 0U MAFOURAIRES DU SUDAN 
NIGERIEN. 
Par P. AMMANN, 
Chef de Service chimique au Jardin colonal, 
ET 
J. VUILLET, 
Directeur de Agriculture dans le Haut Sénégal Niger.? 
[ 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, recues 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. 
