When sowing, optimum sowing conditions and precise seed placement play an important role in promoting seedling development. In certain conditions, a narrower row spacing for faster canopy closure and targeted under-sowing can play an important role in preventing the growth of weeds. Another approach is to increase row spacing to allow for mechanical weeding between the rows. For every possible application in different climate and soil zones, we have developed different single disc, double disc and tine coulter systems for conventional, mulch and direct sowing.