Abstract
Occasional Tillage and Nitrogen Application Effects on Winter Wheat and Grain Sorghum Yield
Highlights
Adoption of NT practices during fallow by many producers in the central Great Plains (CGP) has increased the quantity of residues retained on the soil surface, and soil moisture storage
The sub-plot treatments were assigned to four N fertilizer rates (0, 40, 80, and 120 lb/a of N)
Results showed tillage had no effect on winter wheat grain yield
Summary
Adoption of NT practices during fallow by many producers in the central Great Plains (CGP) has increased the quantity of residues retained on the soil surface, and soil moisture storage This has allowed for cropping intensification in dryland systems in the CGP from winter wheat-fallow to winter wheat-summer crop-fallow or a more intensified cropping system with no fallow depending on soil water availability. In drier years, the upper layer (0–2 inches) of soils in NT tends to be “hard” and presents a challenge to placing seed in subsoil moisture at the time of wheat planting. This may cause poor plant establishment and reduce winter wheat yields. The objective of this study was to determine occasional tillage and nitrogen (N) fertilizer application effects on winter wheat, and grain sorghum yields and soil quality in a wheat-sorghum-fallow cropping system
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