Citation | Al-Mayyahi, T.F., D.A. Jameel and H.A. Alghanmi. 2024. Effect of spraying with conventional and nano-NPK fertilizer on the growth and chemical content of lettuce plants grown by hydroponic technique. Pakistan Journal of Agricultural Research, 37(4): 363-372. DOI | https://dx.doi.org/10.17582/journal.pjar/2024/37.4.363.372