Enhanced soil quality with reduced tillage and solid manures in organic farming - a synthesis of 15 years.

In total, about a two-fold increase in seeds was observed in reduced tillage plots (7936 seeds m −2 ) compared to ploughing (3846 seeds m −2 ) in the 0–20 cm topsoil layer, which was highly significant (ANOVA, F-value 24.5, p < 0.0001).

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An overall trend is thus difficult to discern, and is not actually expected as biodynamic preparations are thought to balance yields 65 .

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