Abstract
The State of Mato Grosso shows potential for cultivation of irrigated wheat, but there is a need for technical information for crop management in rainfed system. In this context, aim was to evaluate the yield components and yield of rainfed wheat cultivars under different sowing dates in the city of Tangara da Serra-MT. The experimental design was a 4x2 factorial scheme, with four cultivars (IAC 350 Bright Guamirim and BR 18) and two sowing dates (23/02/2011 and 19/03/2011). It was found that the first time sowing provided higher averages for yield components: plant height, number of tillers and productivity by about 4 cm, 11.4 and 183.2 kg ha-1, respectively. No significant difference among cultivars and interaction between factors for the components: number of plants, number of tillers, plant height, tiller fertility, number of spikelets per spike, number of spikelets per spike filled, number of blank spikelets per spike, spikelet fertility and number of ears and yield in kg ha -1 . Plant height differed
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