CITRUS BELT, a term applied to that region of the United States where citrus fruits (oranges, lemons, grape-fruit, limes, tangerines and kumquats) can be grown successfully. The sub tropical nature of these fruits limits their culture to the warmer States of the Union, including southern Georgia, Florida, the south ern portions of Alabama, Mississippi, Louisiana, Texas and Ari zona, and the southern three-fourths of California. In 1926 Cali fornia produced 69.9% of the oranges and tangerines, 7.5% of the grape-fruit and over 99% of the lemons. In the same year, Flor ida produced 28.8% of the oranges and tangerines, 87.1% of the grape-fruit, 75% of the kumquats and over 99% of the limes.