WikiWealth

Since rice is a staple of diets for large populations of people, it creates long-term demand for the products associated with rice, include rice itself. High demand will increase the price of the commodity over time. Important crops have few substitutes, therefore, any supply of demand changes will immediate change the price of the commodity. This is a strength for the commodity, because suppliers need to be quickly and accurately compensated for demand of the product. … "Most Important Crop Grown" is an easily defendable qualitative factor, so competing institutions will have a difficult time overcoming it.