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The objective of the study was assessing the effect of the nitrogen and the aspersion irrigation on the growth and dry matter yield of black oats ( Avena strigosa , Schreb). The experiment was conducted in the Campus of USP in Pirassununga - SP. In the study were evaluated four nitrogen levels (0, 50, 100 and 150 kg of N ha -1 ) and also the presence or absence of the irrigation. The plant variables evaluated were: mean height, dry matter percentage, yield and growth rate. The results had disclosed to greater height of plant in the irrigated condition, reflecting in the higher production of dry matter. In dry land area, percentage of DM was 24.7% and in irrigated area 18.7%. The nitrogen was significantly only for plant mean height that showed linear fit when carried through the irrigation. The effect of the irrigation was better for the production of black oats than nitrogen.

Resposta da aveia preta (<em>Avena strigosa</em> schreb) à irrigação por aspersão e adubação nitrogenada