02178naa a2200253 a 450000100080000000500110000800800410001910000260006024501250008626000090021150001430022052012680036365000200163165000190165165000240167065000130169465300280170765300180173570000230175370000170177670000160179370000230180977300920183221005832019-02-25       2018    bl uuuu     u00u1 u    #d1 aGARCIA FUENTES, L. F.  aCorn agronomic traits and recovery of nitrogen from fertilizer during crop season and off-season.h[electronic resource]  c2018  aTítulo em português: Características agronômicas do milho e recuperação de nitrogênio do fertilizante durante a safra e a safrinha.  aThe objective of this work was to evaluate corn agronomic traits in a cultivation subjected to different N rates, during the fall?winter (off-season) and spring?summer crop seasons, and N recovery from fertilizer. The experiment was set up in a randomized complete block design with four replicates, in a 5x2 factorial arrangement, with the following treatments: five N topdressing rates ? 0, 30, 60, 90, and 120 kg ha-1?, using urea as source; and two crop seasons, fall?winter and spring?summer. The following variables were determined: plant height, height of the first ear insertion, number of grains per ear, diameter and length of ear, 1,000-grain weight, N concentration in the leaves and grains, grain-protein concentration, grain yield, N recovery from fertilizer, and soil-N supply. Nitrogen rates in the fertilizer in the fall?winter season had no effect on grain yield, although corn agronomic traits showed a greater reliance on fertilizer-N rates in that season than in the spring?summer, which is a season associated to a greater capacity of soil-N supply to plants. The quantification of soil-N supply enabled knowing the nutrient dynamics during the fall?winter and the spring?summer seasons, which may be useful to guide N fertilization of corn.  aPlant nutrition  aSoil fertility  aFertilidade do Solo  aZea Mays  aN-fertilizer management  aSoil-N supply1 aSOUZA, L. C. F. de1 aSERRA, A. P.1 aJERUSA RECH1 aVITORINO, A. C. T.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 53, n. 10, p.1158-1166, Oct. 2018.