Abstract A field experiment was conducted in Al-Muthanna Governorate to studied influence of different levels of phosphorus three rate (0,50,100) kg P h-1 and three Payments of application (once , twice ,and three parts) on phosphorus released in the soil solution . The order first equation was used to explanation of the results. The result … Continue reading Kinetic Release of Phosphorus when Adding Different Levels of Phosphor and its Fractionation in the Soil Planted Wheat Crop (Triticum aestivum L)