Abdel-Aziz, H.M.M., Hasaneen, M.N.A. and Omer, A.M. 2016. Nano chitosan-NPK fertilizer enhances the growth and productivity of wheat plants grown in sandy soil. Spanish Journal of Agricultural Research. 14, 1 (Mar. 2016), e0902. DOI:https://doi.org/10.5424/sjar/2016141-8205.