Conventional means farming systems that are generally used by the vast majority of farmers today. This approach is more chemically based and emerges from decades of research and instruction from agriculture colleges and universities that believe an industrial approach to achieving efficiency is the best way to maximize yield and profitability. Conventional systems typically allow genetic-engineered seeds and the use of glyphosate (see more here) and other tools prohibited by certified organic and biodynamic approaches. Although there are conventional growers who do not use genetically engineered seed or glyphosate because they seek to meet the desire of specific markets. Many conventional farmers have adopted practices used in organic systems, including enhanced biodiversity around the farm, use of livestock to deliver manure and its nutrients to the soil.