Organic <em>versus</em> conventional farming: Medium-term evaluation of soil chemical properties

Agricultural management affects soil fertility through the frequency and type of agronomic practices such as mechanical operations, rate fertilizers, crop rotations, residue management. This study evaluated evolution chemical properties (pH; electrical conductivity; organic carbon, SOC; total Kjeldahl nitrogen, TKN; available phosphorous, PO4-P) over time in two farming systems, organically conventionally managed, after 5 14 years establishment both northeastern Italy. SOC content remained stable conventional system, but slightly decreased despite inputs from amendments. In contrast, TKN consistently higher system. The PO4-P increased time, systems. Moreover, we observed that an increase 1% clay resulted increases 0.0534 0.0053 g kg–1 TKN, respectively. conclusion, our results indicate does not have advantage terms matter accumulation. Highlights - Organic did carbon system was established. Soil nitrogen farm than farm. C/N ratios were <10, indicating active mineralization.