The ban will remain in place for 30 days, effective immediately and lasting until Friday, October 3.
On the source of resources to procure 200 000MT, Admarc Limited spokesperson Theresa Chapulapula said the funds will come from the Treasury.
While some buyers have been battling with quality and quantity issues, others have been battling unnecessary price hikes.
The move reverses the temporary lifting of restrictions last year to meet local consumption.
The exported volume includes a mix of wheat, corn, and barley.