Research Regarding the Influence of Ammonium Nitrate Different Doses Applied during Seeding in Development and Yield of Maize Cultures

The aim of this paper was the study of the influence of ammonium nitrate applied in maize cultures simultaneously with sowing, the maize yields, as well as humidity. The research were made on the experimental field from The Research Station Jucu in 2011 and the biological material taken into study was created at SDCA Turda from hybrids that were in production and on perspective, namely: TURDA 201 - trilinear, semi early hybrid, created at SDCA Turda, group FAO 320, TURDA 200- double, early hybrid, registered in 1976, booked in The Official Catalogue in 2000 and TURDA 165 - early, trilinear hybrid belonging to the group FAO 270.The obtained results show us that the ammonium nitrate has a different influence on the maize hybrids in the moment.