Abstract
Surface residue helps to reduce soil erosion, but wheat (Triticum aestivum L.) yield in conservation tillage is often less than in conventional tillage, especially when a cereal follows a cereal. Plant development was delayed and tiller initiation less consistent in no-till (NT) winter wheat than in conventionally-tilled (CT) wheat grown following spring wheat. Flattening of the straw rather than leaving it standing improved plant development and grain yield. Burning of straw in NT improved tiller initiation and increased yield. Plants responded to nitrogen (N) similarly in both systems. Lower yield in NT appeared primarily due to poorer tiller initiation and lower tiller survival. To achieve equality with CT, ways must be found to eliminate plant stress during early-tiller initiation.
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