EFFECT OF LENGTHANDDEPTHOF THEDRIPTAPEON WETTING FRONT ADVANCE IN THE ROOT ZONE OF SUNFLOWR USING HYDRUS 2D/3D PROGRAM

A field experiment was carried out during the spring season 2020 at University of Baghdad to study effect length and depth drip tape on wetting advance ofsubsurface irrigation system using Hydrus 2D/3D program. The site planted with sunflower in a clay loam texture. installed 0.3m below soil surfacein two lengths; 20m 40m. designed according arrangement split plotsdesign three replications. treatments were randomly distributed crop. results showed that moisture contents 20 mlength higher compared 40 m length. Also, superior some components yield if exceeded character number seeds one disc, result significant superiority.