Inorganic fertilizers are used as agricultural countermeasures intended to inhibit the soil to plant transfer of radionuclides after a radioactive fallout. Two NH fertilizers, diammonium phosphate (DAP) and NPK, were applied to soil contaminated with a mixture of radionuclides to analyze whether they modify the transfer of Cs,Sr, and Co and stable elements (K, Na, Ca, and Mg) to wheat plantlets grown under controlled laboratory conditions. DAP introduced NH in the soil, which can increase Cs transfer, while NPK also introduced K, which can decrease it. The application of DAP increased the accumulation of Cs in wheat plantlets with increasing application rate, so did theCs/K in plantlets. Regarding the NPK application, the Cs increased in all treatments, but at maximum rate, the available K introduced by the fertilizer was probably able to partially satisfy the nutritional requirements of the wheat plantlet and theCs decreased relative to the recommended rate. The Cs/K ratio in plantlet decreased with increasing NPK rates. The transfer ofSr increased with increasing DAP rate and only at the maximum NPK rate. The Co transfer only increased at the maximum application rates for DAP and NPK. These modifications should be considered when using these fertilizers as agricultural countermeasures.