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Dynamics of mineral nitrogen in a bare soil

Dynamics of mineral nitrogen in a bare soil

Annls agron 19: 103-128

Seasonal changes in mineral N content were followed for 4 yr in bare fallow plots with and without N fertilizers in a slightly alkaline clay-loam over permeable subsoil. No significant amount of NH4-N was recorded. In the no-fertilizer plots, NOs-N was at a minimum in late winter, then increased progressively with increasing mineralization to a maximum in late summer or early autumn, followed by a plateau which, depending on the amount of rainfall, extended into late autumn or winter.

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