Phytoliths, which are silicified structures fonned through the precipitation of silicon in intra- and extra cellular, contribute up to 15 percent of the total weight of rice straw. Conventionally, rice straw is burned and its ash is returned to the field. As a consequense, phytolith can also be cycled to the soil. Due to the abundance of the element in nature and visible symptoms of either Si deficiency or toxicity are not apparent, Si fertilizer is generally ignored. An awareness of Si deficiency in soil is now recognized as being a limiting factor for crop production, particularly in soils that are deemed to be low or limiting in plant available Si and for known Si-accumulating plants such as rice. This study aims to provide a short review of the importance of phytolith as a Si source for crops. Also, physio-chemical properties of phytolith are mentioned in order to reveal an overview of its behavior in soils.