SPRENT, J.I. “Nitrogen Nutrition and Plant Growth. Edited by H. S. Srivastava & R. P. Singh. Enfield, New Hampshire, USA: Science Publishers Inc. 1999. Ix+347pp. ISBN 1 57808 032 0”. Edinburgh Journal of Botany 57, no. 1 (December 4, 2000): 141–150. Accessed September 3, 2026. https://journals.rbge.org.uk/ejb/article/view/1874.