Reference Highlight – Nitrogen Form Preference Forde, Brian G. (1999). [Advances in Botanical Research] Volume 30 || Nitrate and Ammonium Nutrition of Plants: Physiological and Molecular Perspectives. , (), 1–90. doi:10.1016/S0065-2296(08)60226-8 Nitrate and Ammonium Nutrition of Plants: Physiological and Molecular Perspectives – ScienceDirect Contact info@egyptfruit.com for the full-text reference.