Botswana Agricultural Marketing Board is the Custodian of Government Strategic Grain Reserve BAMB is contracted by the Government of Botswana to manage the Strategic Grain Reserve (SGR) for national food security purpose. BAMB has been managing and maintaining the Government S R for more than twenty (20) years. The SGR holds 70 000Mt comprising 30 000Mt of sorghum, 30 000Mt of maize and 10 000Mt of beans.