Summary
Optimizing multifunctionality in agroecosystems is a major goal of sustainable farming. Organic amendments play a crucial role in achieving sustainable management, improving crop yields while enhancing soil functions and protecting soil biodiversity. The objective of this study was to assess the effectiveness of various amendments with contrasting C:N ratios in optimizing soil functions and crop yield in a low-carbon, semi-arid cereal system. We hypothesized that organic amendments promote multifunctionality and that organic matter quality, in terms of its C:N ratio, is the main driver of soil nutrient availability and microfaunal diversity in response to amendments in a 2-year wheat-barley rotation in central Spain. Our findings reveal that amendments with high C:N ratios did not impact s
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