JOHANNESBURG (AP) - President Barack Obama has notified South Africa that Washington plans to suspend part of a lucrative trade agreement between the two countries.

JOHANNESBURG (AP) President Barack Obama has notified South Africa that Washington plans to suspend part of a lucrative trade agreement between the two countries.

In a letter, Obama said South African agricultural exports would be excluded from benefiting from the African Growth and Opportunity Act because the southern African nation continues to bar American agricultural products.

South Africa's minister of trade and industry, Rob Davies, said Friday the two countries could not agree on chicken, beef and pork safety standards. In a televised briefing, Davies said he hoped to reach a resolution with the U.S. before the suspension takes effect in 60 days.

The African Growth and Opportunity Act, passed in 2000, gives sub-Saharan countries access to the U.S. market while offering incentives to American companies operating in these countries.