1. Fennel production as a new vegetable and aromatic crop in Egypt. I. Variety and planting distance impacts on swollen base yield, quality and essential oil content and constituents;Atta-Aly;Arab Univ. J. Agric. Sci.,1999
2. Black, C.A., Evans, D.D., Ensminger, L.E., White, G.L., Clark, F.E., 1981. Methods of Soil Analyses, Part 2. Agronomy, Madison, WI, pp. 1–100.
3. Blackmore, L.C., 1972. Methods for chemical analyses of soils. New Zealand Soil Bureau, P.A. 2.1. Science Report No. 10, pp. 2–85.
4. Effects of irrigation and nitrogen on the yield components of fennel (Foeniculum vulgare Mill.);Buntain;Aust. J. Exp. Agric.,1974
5. The effect of nutrients and variety on keeping quality during storage of fennel (Foeniculum vulgare Mill. subsp. Capillaceaum Gilib. var. Azoricum);Cserni;Acta Hort.,1994