02430naa a2200337 a 450000100080000000500110000800800410001902200140006002400530007410000230012724501040015026000090025452014980026365000100176165000090177165000130178065000250179365000150181865000150183365000120184865000120186065000290187265000100190165000160191165000230192765000190195065000130196970000200198270000260200277300640202821435792022-05-31       2022    bl uuuu     u00u1 u    #d  a1809-82157 ahttps://doi.org/10.5747/ca.2022.v18.n2.a4892DOI1 aSILVEIRA, P. M. da  aProductivity of corn and beans as affected by season and source of nitrogen.h[electronic resource]  c2022  aEnhanced-efficiency fertilizers, which provide a reduction in nitrogen (N) losses, can be a viable alternative for the anticipation of topdressing for the moment of sowing, besides reducing operations for the rural producer. This study aimed to determine the effect of the period of application of enhanced-efficiency nitrogen fertilizers on the grain yield of corn and common bean in the Cerrado region in the direct seeding system. The experiment was carried out during two crop seasons (2019/2020 and 2020/2021), under field conditions. The completely randomized blocks experimental design was used, being arranged in a 2x4+1 factorial, with four replicates. Treatments consisted of the combination of the following two periods of nitrogen application: at sowing and recommended (four open leaves of corn and third trefoil in beans); and of the four following types of nitrogen fertilizers: 1. urea + NBPT + Zeolite; 2. urea + B + Cu + Zeolite; 3. Super N; and 4. Urea. Additionally, a control treatment (without N) was included. Nitrogen values for application in the treatments were adjusted so that 150 kg ha-1 N was applied to the corn, cultivated in summer, and 90 kg ha-1 N was applied to the common bean, cultivated in winter. It was concluded that nitrogen sources and period of nitrogen application did not affect corn grain yield, yield components, and common bean grain yield. The application of nitrogen in corn or common bean provided significant increases in crop grain yield.  aBeans  aCorn  aNitrogen  aNitrogen fertilizers  aNo-tillage  aAdubação  aCerrado  aFeijão  aFertilizante Nitrogenado  aMilho  aNitrogênio  aPhaseolus Vulgaris  aPlantio Direto  aZea Mays1 aNASCENTE, A. S.1 aCARVALHO, M. da C. S.  tColloquium Agrariaegv. 18, n. 2, p. 61-69, mar./abr. 2022.