Effect of Lmwoas on Mobilization of Phosphorous from Acid Soils : Effect of Low Molecular Weight Organic Acids on the Mobilization of Soil Phosphorous From Acid Soils in Ethiopia

Effects five low molecular weight organic acids and their selective combinations on the mobilization of phosphorous on two slightly and moderately soils from Ethiopia have been investigated. To evaluate the effects of five LMWOAs and their combinations the soils were thermostatically incubated at 25C and 40% moisture content for 4 days with LMWOAs by keeping the concentration of LMWOAs at 3.33 mmol Kg-1. Soil pH and Olsen P were analyzed after incubation. All the organic acids used in this study as well as their combinations increased the amounts of NaHCO3- P differently in the order of citric+oxalic citric citric+oxalic+tartaric tarataric oxalic oxalic+malic maleic citric+maleic malic acids (p