Enhancing the Available Water Content in Unsaturated Soil Zone using Hydrogel, to Improve Plant Growth Indices

13- Abedi-Koupai, J., S. S. Eslamian and. J. Asadkazemi, 2008. Enhancing the Available Water Content in Unsaturated Soil Zone using Hydrogel, to Improve Plant Growth Indices, Ecohyrology & Hydrobiology, Poland, 8(1): 3-11.