1. Bock B R 1986 Increasing cereal yields with higher ammonium/nitrate ratios: review of potentials and limitations.In Proceedings of Maximum Wheat Yield Research Systems Workshop. Mar 5–7, 1986. Denver, Colorado, pp 1–31.
2. Agron. Monogr. No.;J M Bremner,1965
3. Dijkshoorn W 1962 Metabolic regulation of the alkaline effect of nitrate utilization in plants. Nature 194, 165–167.
4. Hageman R H 1980 Ammonium and nitrate nutrition of higher plants. pp 67–85.In Nitrogen in Crop Production. Ed. R D Hauck. American Society of Agronomy, Madison, Wisconsin, USA.
5. Hiatt A J 1978 Critique of absorption and utilization of ammonium nitrogen by plants.In Nitrogen in the Environment. Eds. D R Nielsen and J G MacDonald. Vol. 2 Academic Press, New York, USA, pp 191–199.