HARARE, June 8( Xinhua)--The Zimbabwean government has reviewed the producer price of maize grain and introduced an incentive for early delivery to State grain procurers in an effort to boost farmer viability and the country's Strategic Grain Reserves( SGR). The new maize producer price is now pegged at 75, 000 Zimbabwean dollars( 234 U.S. dollars) per metric ton from 58, 553 Zimbabwean dollars, plus a fixed early delivery incentive of 90 U.S. dollars per ton, acting Information Minister Jenfan