The effect of different concentration of Gibberellic acid and the (Glycerhiza glabra L.) extract on some characters of growth , yield , oil content for Chamomile plant Matricaria chamomilla L.
Maǧallaẗ al-Anbār li-l-ʿulūm al-zirāʿiyyaẗ/Maǧallaẗ al-anbār li-l-ʻulūm al-zirāʻiyyaẗ