Abstract
In a few plant species essentiality of silicon has been demonstrated so far, but it is beneficial for most of the higher plants, under certain circumstances. The beneficial effects of silicon on crop growth are well documented especially under biotic and a-biotic stress conditions, Several mechanisms have been proposed for these responses, Crop yield responses to silicon may be associated with improved resistance against biotic and a-biotic stresses, such as disease and pest resistance, AI, Mn and Fe toxicity alleviation, increased P availability, reduced lodging, improved leaf and stem erectness, freeze resistance and improvement in plant water economy, This review covers the beneficial effects of silicon on crop growth and yield
