EN
The usual range of P in soils is of the order of 500 to 800 mg kg⁻¹; in Hungarian soils it is 200-900 mg kg⁻¹ [3,9]. Total P is usually highest in the upper A horizon and lowest in the lower A and upper B horizons because of recycling by plants. The organic P content (10-60 % of total-P) is the highest in the top layer and decreases with depth in all soils [9].