State air quality managers say officials in the San Joaquin Valley need to pass stricter rules to control pollution from trucks, farm equipment and suburban sprawl.

In June, the California Air Resources Board approved a local plan asking the federal government for an 11-year extension to bring the valley's smoggy air in line with current, tougher federal ozone standards.

Now the board says the San Joaquin Valley Air Pollution Control District could meet those goals sooner if it focused on reducing pollution from farms and construction.

Both industries release airborne particles that contribute to smog.