Controlled-release and stabilized fertilizers are equivalent options to split application of ammonium nitrate in a double maize-oats cropping system

The application of fertilizers as a topdressing in maize raises serious concerns because too much fertilizer is retained the upper leaves, causing burning to tissues. In this study, use controlled-release and stabilized (with 3, 4-dimethylpyrazole phosphate) was compared with conventional split into two equivalent applications forage maize-oats cropping system. maize, 100 200 kg N ha−1 different were used addition an unfertilized control. oat crop not fertilized, since it served only winter catch crop. Maize dry matter (DM) yield increased significantly rate 2019, being second growing season, control showing lowest average value (7.1 t ha−1). most fertilized treatments (200 ha−1) gave highest DM yields, ranging between 14.2 16.7 ha−1, but no significant differences them. Oats had relevant role recovering residual that could have potentially been lost from soil. Stalk nitrate concentration proved be very sensitive fertilization (varying 150.4 1945.6 mg kg−1 2018 494.9 1574.9 2019), great potential tool management. These three strategies seem valid options farmers can consider, after incorporating technical-economic information related equipment suitability price fertilizers.