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Long-term inputs of phosphorus (P) and organic carbon from organic fertilizers may stimulate basal microbial mineralization and increase the biotic contribution to P availability. However, the effects of organic fertilization on basal soil P fluxes remain poorly understood, particularly for societal “wastes” (e.g. sewage sludge) which are gaining prominence as alternative P fertilizers. We quantified biotic and abiotic P fluxe...
Urban waste fertilizer: effects on yield, nutrient dynamics, and potentially toxic element accumulationNARA Subscribed
Recycling nutrients contained in urban wastes to agriculture is essential in a circular economy. This study simultaneously compares different recycled fertilizers (household waste compost, sewage sludge, human urine) with mineral fertilization and animal manures. Tested were their long-term effects on yield, nutrient budgets, potentially toxic element (PTE) accumulation, and nitrogen (N)/carbon (C) cycle (among others N effici...
Sustainable growth of organic farming in the EU requires a rethink of nutrient supplyNARA Subscribed
The European Commission recently set a target of increasing the area of organic agriculture to 25% by 2030. To achieve this, it is imperative to understand current nutrient use patterns and identify sustainable nutrient supply opportunities. To that end, this study assessed the sustainability of the current nutrient origin and supply of 71 arable organic farms in 8 European regions. Deficient nutrient supply was found on 24%,...
Cover crop root morphology rather than quality controls the fate of root and rhizodeposition C into distinct soil C poolsNARA Subscribed
Cover crops increase carbon (C) inputs to agricultural soils, and thus have the potential to mitigate climate change through enhanced soil organic carbon (SOC) storage. However, few studies have explored the fate of belowground C inputs associated with varying root traits into the distinct SOC pools of mineral‐associated organic carbon (MAOC) particulate organic carbon (POC). Therefore, a packed 0.5 m column trial was establis...
Reliance on Biological Nitrogen Fixation Depletes Soil Phosphorus and Potassium ReservesNARA Subscribed
Limited nutrient availability is one of the major challenges in organic farming. Little is known about nutrient budgets of organic farms, the underlying factors or effects on soil fertility. We therefore assessed farm gate nutrient budgets for nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg) and sulfur (S) of 20 organic farms in Germany and analyzed their soil nutri-ent status. In average, the budgets showed a surpl...