A method of soil tillage, prior to seeding of a crop, comprises forming a pair of parallel seeding rows (10) by working the soil so that each seeding row comprises a strip of worked soil having a predetermined depth. The seeding rows are laterally spaced apart from each other to define an intermediate strip (12) of unworked soil. A roller (22) is applied to the intermediate strip (12) of unworked soil in order to compact the strip and shape the upper surface thereof so that rainwater falling on the intermediate strip drains towards and into at least one of the adjoining seeding rows.
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