Simulation of nitrogen uptake, fixation and leaching in a grass/white clover mixture

agua del suelo azote chemical composition composition chimique cycle de l'azote cycling eau du sol environmental factors facteur du milieu factores ambientales fertilidad del suelo fixation de l'azote gramineae grasslands herbage leaching lessivage du sol lolium perenne nitrogen nitrogen balance nitrogen cycle nitrogen fixation nitrogen metabolism photosynthese photosynthesis plant competition poaceae praderas soil fertility soil water trifolium trifolium repens