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•Biochar can actively promote soil C storage by promoting aggregation and the physical stabilization of SOM.•Soil and biochar types greatly impacted soil chemical properties and microbial communities.•Biochar induced a greater loss of C in a soil where aggregation was not improved.
The formation of water-stable macroaggregates in soil is beneficial for many reasons, including carbon (C) sequestration, nutrient retention, and erosion control. A mix of biotic (e.g., plant C input, microbial activity) and abiotic factors (e.g., water, mineral interactions) contribute to form macroaggregates. However, in order to better model and manage soil macroaggregates, we need to know more...
Switchgrass (Panicum virgatum L.), a cellulosic biofuel feedstock, may promote soil C accumulation compared to annual cropping systems by increasing the amount and retention of root-derived soil C inputs. However, these inputs and stabilization thereof may differ by cultivar, and it is uncertain which root traits favor soil C input and stabilization rates. The aim of this study was to assess how different...
The addition of exogenous organic matter derived from organic wastes has been widely used to restore semiarid, degraded soils, favoring the development of plant cover. After organic amendment, soil particle aggregation can increase due to the increase of organic matter, plant roots and microbially derived compounds. However, the effect of organic amendment addition over time on aggregate formation...
Land application of biochar, as a strategy to enhance soil fertility and reduce greenhouse gas (GHG) emissions is receiving widespread interest. Short-term soil incubations (29days) were used to investigate the effects of agriculturally relevant biochar applications from two contrasting feedstocks and temperatures on CO 2 and N 2 O emissions from a fertile agricultural soil amended...
Issues of food security, environmental degradation and global climate change underscore the need for the improved understanding of sustainable agricultural systems around the globe. The Quesungual slash-and-mulch agroforestry system (QSMAS) of western Honduras offers a promising alternative to traditional slash-and-burn (SB) agriculture for the mountainous tropical dry forest zones of Central America,...
The objective of this study was to examine the interactive effects of tillage and land forms (erodibility) on the redistribution of C, N and P within an agricultural landscape. Soils were sampled from an undulating maize field in central Belgium. Half of the field was under conventional tillage (CT), while the rest was under minimum tillage (MT) management. Based on slope and curvature characteristics,...
The interactive effects of two functionally different earthworm species (Aporrectodea caliginosa (endogeic species) and Lumbricus rubellus (epigeic species)) on the incorporation of fresh residue into large macroaggregates and formation of microaggregates within these large macroaggregates were investigated during a short-term laboratory experiment using 13 C-labelled sorghum (Sorghum bicolor...
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