
Marie-Elise SamsonUniversité Laval | ULAVAL · Department of Soil and Agri-Food Engineering
Marie-Elise Samson
agr. Ph. D.
Assistant professor, Université Laval, QC, Canada
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9
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Introduction
Skills and Expertise
Publications
Publications (9)
Aims
Perennial forages in rotation with annual crops can improve agricultural resilience by increasing soil organic carbon. However, how nitrogen (N) sources interact with rotation diversity to influence soil nitrous oxide (N2O) emissions is not well understood.
Methods
During three snow-free seasons, N2O emissions, crop yields, and ancillary vari...
A widely considered climate change mitigation strategy in agriculture is enhancing soil carbon (C) sequestration—the process of capturing atmospheric carbon dioxide and storing it in the soil. By adopting natural climate solutions (NCS) such as cover crops, reduced tillage, and diverse crop rotations, farmers can increase soil C sequestration and c...
Subsoil contains about half of the soil organic carbon (C) at the global scale. However, C and nitrogen (N) in the subsoil are assumed to be relatively stable, and their response to agricultural management practices is uncertain. This study compared the effect of 20 different management systems, combining two tillage regimes (inversion tillage vs m...
The objective of this study was to compare crops yield (corn, soybean, wheat) and environmental impact (soil health and C storage) of 20 different combinations of management practices including tillage regime (minimum tillage, mouldboard plowing), crop residue management (harvested or returned to soil) and five different fertilizer sources (organic...
Recent models of soil organic matter (SOM) formation propose that the coarse mineral-associated fraction (coarse-MAOM) could be a pivotal fraction bridging the gap between fresh organic matter inputs and stabilized, mineral-associated SOM. However, little is known about the effect of organic input chemistry and soil texture on the carbon (C) and ni...
Our understanding of soil organic matter (SOM) formation and stabilization mechanisms has evolved recently. The SOM is considered as a continuum from coarse fresh and decomposing plant residues (particulate organic matter, >53 μm; POM) to fine and presumably more stable mineral-associated organic matter (fine organic matter, <53 μm; FOM), which rep...
The impact of management practices on crop productivity has often been assessed. However, crop response to specific practices may vary as a function of soil type and other associated management practices. The objective of this study was to determine how interactions between tillage, fertilizer source, crop residue management, and pedoclimatic facto...
A recent study suggests a sensitivity of cranberry to saline stress. Consequently, monitoring of soil electrical conductivity may help growers to identify areas where plants could be under stress due to salt deposits. We used two different types of probes, a time-domain reflectometry (TDR; model CS645 probe) and a capacitive approach (model GS3 pro...
New recommendations in cranberry production suggest reducing overhead irrigation and the use of subirrigation as an alternative irrigation method, two strategies suspected to increase the risk of salt buildup in soil. Because very little is known about cranberry tolerance to salinity, this study was conducted to determine if deficit irrigation and...