Effects of NP Fertilizer Placement Depth by Year Interaction on the Number of Maize (Zea mays L.) Plants after Emergence Using the Additive Main Effects and Multiplicative Interaction Model

Field experiments were carried out at the Department of Agronomy Poznań University Life Sciences to determine effect depth NP fertilization placement in maize cultivation on number plants after emergence. The adopted assumptions verified based a six-year field experiment involving four depths fertilizer application (A1—0 cm (broadcast), A2—5 (in rows), A3—10 A4—15 rows)). objective this study was assess depth, conjunction with year, (Zea mays L.) emergence using additive main effects and multiplicative interaction model. decreased soil profile, confirming high dependence phosphorus nitrogen availability, as well greater subsoil loosening during placement. for experimental varied from 7.237 8.201 plant m−2 six years, an average 7.687 m−2. 61.51% variation total explained by years differences, 23.21% differences between 4.68% interaction. 10 (A3) most stable (ASV = 1.361) terms among studied depths. Assuming that kernels are placed approx. 5 cm, starter should be side below kernel. Deeper is not recommended. condition use agriculture progress, represented localized fertilization, simultaneous recognition aspects yielding physiology new varieties assessment their reaction deeper seed sowing.