THE EFFECT OF GYPSUM CONTENT IN UPPER HORIZONS OF SOIL ON WHEAT PRODUCTIVITY UNDER A CENTER PIVOT SPRINKLER IRRIGATION SYSTEM
Maǧallaẗ al-Anbār li-l-ʿulūm al-zirāʿiyyaẗ/Maǧallaẗ al-anbār li-l-ʻulūm al-zirāʻiyyaẗ