How did the climate of the Arabian Peninsula influence the way nomads lived

The Arabian Peninsula is largely arid desert. There are a few oasis areas but just not enough fertile farmlands are available to allow for a agriculture based way of sustenance. Without a farm to raise food, people use animals a main food source. Feeding animals requires grazing. The rainfall patterns on the Arabian Peninsula dictate the pattern of nomadic life. The oasis areas,where people have settled to farm, are where the nomads trade animal and goods for grain, vegetables or other agricultural goods. Time and season dictate the pattern the nomads will follow each year.