Alluvial Soil: rich soil made of sand and mud deposited by running water
Wadi: in the desert, a streambed that is dry except during a heavy rain.
Kum: term for deserts in Central Asia
Phosphate: natural mineral containing chemicals compounds often used in fertilizer
Oasis: small area in a desert where water and vegetation are found
Pastoralism: the raising of livestock
Cereal: any grain, such as barley, oats, or wheat, grown for food