In embodiments, a seeder may include a frame including a seed box and a rear roller. In embodiments, the seeder may be configured to removably couple with either a roller assembly or a disc blade assembly. In some embodiments, the seeder may include a front tray configured to receive two kinds of seed from two different seed boxes and disperse the seed at a position in front of the rear roller so that the seeds are planted at the same depth. In some embodiments, the seeder may further include a calibration tray which may have a width less than a width of the seeder. The calibration tray may be configured to receive seed from the seed box during a calibration procedure.