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The supply of soil phosphorus (P) to plants relies on the replenishment of the pool of phytoavailable P forms. In this work, we assessed the effect of 18 years of direct drilling (DD) and conventional tillage (CT) on P forms and sorption properties in the surface horizon of a calcareous Vertisol (Chromic Haploxerert) of southern Spain. P forms in the 0–6cm top layer of the soil were quantified by...
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