Fuente: WIPO "tomato" The agrochemical liquid composition described in this invention comprises an electrostatic complex of anionic herbicide, i.e., glufosinate-ammonium and C6-C24- alkylamine, and its composition with other auxiliary agents that stabilize the complex. After dilution with water, this composition forms a liquid crystal system, which improves the penetration of the glufosinate-ammonium on the hydrophobic layer of the invading weeds and/or grass. This invention specifically pertains to an agrochemical liquid composition containing glufosinate-ammonium, its preparation method, and its use for controlling and protecting crops from unwanted weeds and/or grass.