High Desert Soils
High Desert soils are mostly loamy sand, deep and well-drained Entisols* formed in alluvium fans derived dominantly from granitic rocks and related rocks.
Slopes range from 0 to 10 percent most of the time.
To explore soil types, visit USDA's Web Soil Survey.
* young soils with minimum profile development
Parent material diversity, land leveling and fertilization practices are major causes of soil nutrient spatial variability. Site-specific nutrient management studies conducted in this region report significant soil P and K spatial variability.
Below is a map of phosphorus from a 90.8 acre onion field:
Click here to view more examples of phosphorus and potassium maps of alfalfa and onion fields around Lancaster and Palmdale.