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    Chemical treatment of soil alleviates effects of soil compaction on pea seedling growth

    HIGH mechanical resistance of soils, related to naturally occurring hard pans, or to compaction by machinery and untimely cultivation1–3, often reduces crop yields through poor development of root systems1,4–6. I...

    SHEENA M. WILKINS, HENRY WILKINS, R. L. WAIN in Nature (1976)