Casa Grande -- Arizona State Soil
Casa Grande Soil Profile
Surface layer: light brown,
saline-sodic fine sandy loam
Grande series was first identified in 1936. It is named after the city of
Casa Grande and the nearby Casa Grande National Monument, home of a large
earthen building constructed by the Hohokam Indians nearly 1,000 years
ago. The Spanish words “Casa Grande” mean “Big House.” The Indians used
irrigation to remove excess salts from Casa Grande soils and raised
cotton, grain, and vegetables on these productive soils, much as farmers
The Casa Grande series consists of very deep, well-drained, saline-sodic soils on fan terraces and relict basin floors. These soils formed in alluvium derived from granite, rhyolite, andesite, quartzite, and some limestone and basalt. Slopes generally are 0 to 5 percent. The climate is hot and arid.
Casa Grande soils have a known distribution of about 275,000 acres and a probable distribution of several million acres throughout central and southwestern Arizona.