1. Official Methods of Analysis (15th Ed);A.O.A.C,1990
2. Effect of some trace elements on growth, yield and chemical constituents of Trachyspermum ammi L (AJOWAN) plants under sinai conditions;Abd El-Wahab;Res. J. Agri. Biol. Sci.,2008
3. Botanical Studies on Moringa Plant;Abou-Shleell,2017
4. Effect of zinc and sulphur on herb, oil yield and quality of Menthol mint (Mentha arvensis L.) var;Ajay;Kosi. J. Chem. Pharm. Res.,2010
5. Synergetic effects of 5-aminolevulinic acid and Ascophyllum nodosum seaweed extracts on Asparagus phenolics and stress related genes under saline irrigation;Al-Ghamdi;Plant Physiol. Biochem.,2018