▁with ▁animal ▁mot iff ▁and ▁script ▁confir ms ▁this ▁as ▁a ▁site ▁belonging ▁to ▁Ind us ▁Valley ▁Civil isation ▁( not ▁just ▁having ▁contact ▁with ▁IV C ). ▁ ▁Br icks ▁had ▁typical ▁Har app an ▁measurements . ▁ ▁D ry land ▁far ming ▁A ▁pl ough ed ▁field ▁with ▁fla x ▁se eds ▁in ▁this ▁site ▁indicate ▁dry ▁land ▁far ming ▁and ▁ir rig ation ▁can als ▁d ug ▁to ▁bring ▁water ▁from ▁K ok cha ▁( 2 5   km ▁distance ) ▁also ▁indicate ▁efforts ▁put ▁in ▁agricult ure . ▁There ▁are ▁several ▁theories ▁that ▁explain ▁the ▁existence ▁of ▁canal ▁ir rig ation ▁system ▁in ▁the ▁area . ▁The ▁first ▁involves ▁the ▁suggestion ▁that ▁the ▁Ind us ▁sett lers ▁brought ▁the ▁technology ▁with ▁them . ▁Another ▁theory ▁propos es ▁that ▁the ▁canal ▁was ▁part ▁of ▁the ▁influence ▁of ▁the ▁Nam az ga ▁culture , ▁which ▁fl our ished ▁in ▁the ▁adjacent ▁southern ▁Turk men ia . ▁ ▁Tr ading ▁post ▁Short ug ai ▁was ▁a ▁trad ing ▁post ▁of ▁Har app an ▁times ▁and ▁it ▁seems ▁to ▁be ▁connected ▁with ▁la pis ▁la z uli ▁mines ▁located ▁in ▁the ▁surrounding ▁area . ▁It ▁also ▁might ▁have ▁connections ▁with ▁tin ▁trade ▁( found ▁at ▁Afghan istan ) ▁and ▁cam el ▁trade , ▁along ▁with ▁other ▁Afghan ▁valu ables . ▁There ▁are ▁arch ae olog ists ▁who ▁raise ▁the ▁issue ▁of ▁the ▁absence ▁of ▁coin age ▁and ▁of ▁an ▁agreed ▁de ci pher ment ▁despite ▁the ▁extensive ▁trade ▁networks ▁controlled ▁and ▁operated ▁by