Abstract
In a 52-year stationary experiment at the Central Experimental Field of the Kurgan Research Institute, the effect and aftereffect of phosphorus fertilizer against the background of nitrogen application were studied. A dose of P40 in combination with nitrogen, introduced for 25 years in the corn–two wheat–oats crop rotation (in the amount of P1000), after discontinuation of use, had a long aftereffect in sowing permanent wheat after stubble. In the experiment, the economic efficiency of the action and aftereffect of a dose of phosphorus P1000 was evaluated. Taking into account the 27-year aftereffect, the payback of the phosphorus dose of P40 added to N40–50 increased from 9.0 to 15.5 kg/kg.
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