✦ LIBER ✦

Phosphorus budget and phosphorus availability in soils under organic and conventional farming

✍ Scribed by F. Oehl; A. Oberson; H.U. Tagmann; J.M. Besson; D. Dubois; P. Mäder; H.-R. Roth; E. Frossard

No coin nor oath required. For personal study only.

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