Those with some agricultural experience would also realize that the bearded darnel’s root system usually intertwines with that of the wheat.
فَهُمْ يُدْرِكُونَ مَا أَصْعَبَ تَمْيِيزَ ٱلْحِنْطَةِ مِنَ ٱلزِّوَانِ .‏