Gaberg, P. K.2015-07-142015-07-141970East African Agricultural And Forestry Journal, 35, p. 396-4080012-8325http://localhost:8080/dspace/handle/0/4097Birch found significant and inverse relationships between percentage responses to phosphorus fertilizer and the amount of water or citric soluble silica in acid East African soils [1], for wheat and grassland crops Researches reported by other workers [e.g. 1, 2, 3, 4, 5, 6] show that there exists a dynamic interaction Between silicon, iron and aluminium with phosphate ions in the soil, leading to a variable degree of fixation; the extent and reversibility of this interaction is pH dependent. It is generally held that a high degree of phosphate ion fixation in acid soils by iron and/ or aluminium tends to mask expected crop responses to applied phosphorus. More recently, work has been published which suggests that the ph03- phate ion fixation may need to be saturated by fertilizer application to a lesser or greater degree, before crop responses can be predicted or observed with accuracy [7, 8].enhttp://creativecommons.org/licenses/by/3.0/Journal ContributionSilicaMaizePhosphorusPlant responseAcid soils