An inadequate S supply will not only reduce yield and crop quality, but it will decrease N use efﬁciency and enhance the risk of N loss to the environment. Studies have demonstrated that supplying S to deﬁcient pastures increased yields, N use efﬁciency, and lowered N losses from the soil. Due to the close linkage between S and N, Schnug and Haneklaus (2005) estimated that one unit of S deﬁcit to meet plant demand can result in 15 units of N that are potentially lost to the environment. They calculated that S deﬁciencies in Germany may be contributing to an annual loss of 300 million kg of N (or 10% of the total N fertilizer consumption of the country).
Schnug, E. and S. Haneklaus 2005. In L.J. de Kok and E. Schnug (eds.) Proc. First Sino-German workshop on aspects of sulfur nutrition of plants. Braunschweig, Federal Agricultural Research Centre (FAL), p.131.