Shukri, .H.M. 2016. Effect of Diammonium Phosphate (DAP) Fertilization on Growth of Sage Plant (Salvia officinalis L.) and Concentration of Volatile Oil. Journal of Biotechnology Research Center. 10, 1 (Jan. 2016), 31–36. DOI:https://doi.org/10.24126/jobrc.2016.10.1.456.