The effects of lime and fused magnesium phosphate (FMP) applications on nutrient uptake and yield of peanuts and rice, grown in an acid soil, were studied in an extended pot trial. Both lime and FMP applications increased soil pH and improved the bioavailability of Ca, Mg, Mn, P and K in the treated soil. Significant yield benefits were also found in peanut and rice crops grown in the acid soil receiving soil amelioration treatments. The increased yields were attributable to the enhanced uptake of Ca, Mg, P and K. Peanut yields were increased with increasing amounts of applied FMP. The yields of rice were moderately decreased at high rates of FMP application; however, the yield benefit was still significant in comparison with the control. FMP seems to be more advantageous than lime because it is also a source of P to support peanut and rice growth.