Sowing machine with at least one row (17； 18) of sowing elements (10) comprising in each case a grating body (13) to produce a sowing groove in the ground, leading to at least some of the sowing elements ( 10) in each case at least two separate seed ducts (9； 11), of which a first seed duct (9) can be fed with row sowing seeds and / or fertilizer and a second seed duct (11 ) is connected to a grain separation device (12) and can be fed with seeds in individual grains, the grating bodies (13) comprising the at least some sowing elements (10) for the second seed ducts (11) in each case a groove former (15) that is removably configured from a grille body base (14) and / or so that it can be removed from its operating position, characterized in that the groove former (15) that can be removed comprises a channel of seed conduit (19) forming a section of the second seed conduit (11), the first seed conduit (9) being arranged in the direction of travel in front of the furrow former (15) that can be removed and ending / ending by above the furrow former (15) and the grain separation device (12) being arranged above, spaced apart, from the sowing elements (10) running on the ground.Máquina sembradora con al menos una fila (17； 18) de elementos sembradores (10) que comprenden en cada caso un cuerpo de reja (13) para producir un surco de sembrado en el suelo, conduciendo a al menos algunos de los elementos sembradores (10) en cada caso al menos dos conductos de semillas (9； 11) separados, de los cuales un primer conducto de semillas (9) se puede alimentar con semillas de siembra en hilera y/o abono y un segundo conducto de semillas (11) está conectado con un dispositivo de separación de granos (12) y se puede alimentar con semillas en granos individuales, comprendiendo los cuerpos de reja (13) de los al menos algunos elementos sembradores (10) para los segundos conductos de semillas (11) en cada caso un formador de surcos (15) que está configurado de manera desmontable de una
