David A. Lobb
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View article: Using a Reference Color Plate to Correct Smartphone-Derived Soil Color Measurements with Different Smartphones Under Different Lighting Conditions
Using a Reference Color Plate to Correct Smartphone-Derived Soil Color Measurements with Different Smartphones Under Different Lighting Conditions Open
Soil color has long been used as an indicator for soil properties such as soil organic carbon and soil moisture. Recent developments in citizen science have seen the increased use of smartphone cameras for soil color measurements. However,…
View article: Using a Reference Color Plate to Correct Soil Color Measurements with Different Smartphones Under Different Lighting Conditions
Using a Reference Color Plate to Correct Soil Color Measurements with Different Smartphones Under Different Lighting Conditions Open
Soil color has long been used as an indicator for soil properties such as soil organic carbon and soil moisture. Recent developments in citizen science have seen increased use of smartphone cameras for soil color measurements. However, the…
View article: Soil degradation mobilizes soil nutrients placing Canadian Prairie wetlands at risk
Soil degradation mobilizes soil nutrients placing Canadian Prairie wetlands at risk Open
Depressional wetlands in the Canadian Prairies are experiencing degradation due to intensive agricultural practices in adjacent upland areas. Depressional wetlands within cropland are particularly affected, as increased sedimentation and r…
View article: Technical note: Comparison of radiometric techniques for estimating recent organic carbon sequestration rates in inland wetland soils
Technical note: Comparison of radiometric techniques for estimating recent organic carbon sequestration rates in inland wetland soils Open
For wetlands to serve as natural climate solutions, accurate estimates of organic carbon (OC) sequestration rates in wetland sediments are needed. Dating using cesium-137 (137Cs) and lead-210 (210Pb) radioisotopes is commonly used for meas…
View article: The potential to reduce runoff generation through improving cropping and tillage practices in a sub-humid continental climate
The potential to reduce runoff generation through improving cropping and tillage practices in a sub-humid continental climate Open
Agricultural sustainability is threatened by both water deficit and water excess, especially at the presence of extreme meteorological events resulting from climate change. However, there has been lack of demonstrations on management optio…
View article: Potential phosphorus mobilization from riparian vegetation following freezing
Potential phosphorus mobilization from riparian vegetation following freezing Open
Phosphorus (P) rich runoff from agricultural landscapes is a major contributor to freshwater eutrophication. Vegetated riparian zones are often employed to retain P from field runoff before it enters streams. In cold regions, vegetation ha…
View article: Status of the World's Soils
Status of the World's Soils Open
Healthy soils contribute to a wide range of ecosystem services and virtually all of the UN Sustainable Development Goals, but most of the world's soil resources are in only fair, poor, or very poor condition, and conditions are getting wor…
View article: Technical Note: Comparison of radiometric techniques for estimating recent organic carbon sequestration rates in freshwater mineral soil wetlands
Technical Note: Comparison of radiometric techniques for estimating recent organic carbon sequestration rates in freshwater mineral soil wetlands Open
For wetlands to serve as natural climate solutions, accurate estimates of organic carbon (OC) sequestration rates in wetland sediments are needed. Dating using cesium-137 (137Cs) and lead-210 (210Pb) radioisotopes is commonly used for meas…
View article: Effect of Sampling Design on Characterizing Surface Soil Fingerprinting Properties
Effect of Sampling Design on Characterizing Surface Soil Fingerprinting Properties Open
Purpose: The characterization of soil properties is an important part of many different types of agri-environmental research including inventory, comparison, and manipulation studies. Sediment source fingerprinting is a method that is incr…
View article: Effect of Sampling Design on Characterizing Surface Soil Fingerprinting Properties.
Effect of Sampling Design on Characterizing Surface Soil Fingerprinting Properties. Open
Purpose: The characterization of soil properties is an important part of many different types of agri-environmental research including inventory, comparison, and manipulation studies. Sediment source fingerprinting (i.e., tracing) is a met…
View article: Practical Guide to Measuring Wetland Carbon Pools and Fluxes
Practical Guide to Measuring Wetland Carbon Pools and Fluxes Open
Wetlands cover a small portion of the world, but have disproportionate influence on global carbon (C) sequestration, carbon dioxide and methane emissions, and aquatic C fluxes. However, the underlying biogeochemical processes that affect w…
View article: Agricultural activities lead to sediment infilling of wetlandscapes in the Canadian Prairies: Assessment of contributions by tillage, water and wind erosion
Agricultural activities lead to sediment infilling of wetlandscapes in the Canadian Prairies: Assessment of contributions by tillage, water and wind erosion Open
Soil erosion and sediment delivery models have been increasingly employed in studies of catchment sediment dynamics in current years. These models are also used to represent the spatial interaction of soil erosion and sediment transport pr…
View article: Key soil properties and their relationships with crop yields as affected by soil–landscape rehabilitation
Key soil properties and their relationships with crop yields as affected by soil–landscape rehabilitation Open
Tillage and water erosion induce spatially dependent changes in soil properties that influence productivity. Soil–landscape rehabilitation (returning translocated topsoil to landscape positions of soil loss by erosion) is one method to imp…
View article: Climate change amplifies the risk of potentially toxigenic cyanobacteria
Climate change amplifies the risk of potentially toxigenic cyanobacteria Open
Cyanobacterial blooms pose a significant threat to water security, with anthropogenic forcing being implicated as a key driver behind the recent upsurge and global expansion of cyanobacteria in modern times. The potential effects of land‐u…
View article: Agricultural activities lead to sediment infilling of wetlandscapes in the Canadian Prairies: Assessment of soil erosion and sedimentation fluxes
Agricultural activities lead to sediment infilling of wetlandscapes in the Canadian Prairies: Assessment of soil erosion and sedimentation fluxes Open
Wetlandscapes are vulnerable to land conversion and sediment infilling from upland agriculture, causing them to act as sinks for sediment deposition and putting at risk their ecosystem services. Wetlandscapes in the Canadian Prairies agroe…
View article: Phosphorus dynamics in agricultural surface runoff at the edge of the field and in ditches during overbank flooding conditions in the Red River Valley
Phosphorus dynamics in agricultural surface runoff at the edge of the field and in ditches during overbank flooding conditions in the Red River Valley Open
Agricultural fields in the Red River Valley of the Northern Great Plains are located on flat clay soils, often drained by shallow, roadside ditches that are not graded and lacking relief. These conditions can result in flow reversals and s…
View article: The Costs of Soil Erosion to Crop Production in Canada between 1971 and 2015
The Costs of Soil Erosion to Crop Production in Canada between 1971 and 2015 Open
Canada is known for its massive and fertile landscape, and one of the biggest industries in Canada is crop production, which is responsible for contributing to the national economy as well as the global food supply. Soil erosion is conside…
View article: Assessing soil erosion and sediment flux using 137Cs within topographically complex landscapes of Prairie Pothole Region of Canada
Assessing soil erosion and sediment flux using 137Cs within topographically complex landscapes of Prairie Pothole Region of Canada Open
Soil erosion and associated land degradation, accelerated by anthropogenic activities, are serious worldwide environmental problems that can reduce crop productivity and cause on- and off-site damages resulting from sediment transport and …
View article: Simulating the hydrological impacts of land use conversion from annual crop to perennial forage in the Canadian Prairies using the Cold Regions Hydrological Modelling platform
Simulating the hydrological impacts of land use conversion from annual crop to perennial forage in the Canadian Prairies using the Cold Regions Hydrological Modelling platform Open
The Red River is one of the largest contributing sources of discharge and nutrients to the world's 10th largest freshwater lake, Lake Winnipeg. Conversion of large areas of annual cropland to perennial forage has been proposed as a strateg…
View article: Can Restoration of Freshwater Mineral Soil Wetlands Deliver Nature-Based Climate Solutions to Agricultural Landscapes?
Can Restoration of Freshwater Mineral Soil Wetlands Deliver Nature-Based Climate Solutions to Agricultural Landscapes? Open
This study advances scientific understanding of the magnitude of carbon sequestration that could be achieved through conservation (securing existing carbon stocks) and restoration (creating new carbon stocks) of freshwater mineral soil wet…
View article: Influence of climate, topography, and soil type on soil extractable phosphorus in croplands of northern glacial‐derived landscapes
Influence of climate, topography, and soil type on soil extractable phosphorus in croplands of northern glacial‐derived landscapes Open
Delineating the relative solubility of soil phosphorus (P) in agricultural landscapes is essential to predicting potential P mobilization in the landscape and can improve nutrient management strategies. This study describes spatial pattern…
View article: Comment on hess-2022-128
Comment on hess-2022-128 Open
The Red River is one of the largest contributing sources of discharge and nutrients to the world’s 10th largest freshwater lake, the Lake Winnipeg. Conversion of large areas of annual crop land to perennial forages has been proposed as a s…
View article: Comment on hess-2022-128
Comment on hess-2022-128 Open
Abstract. The Red River is one of the largest contributing sources of discharge and nutrients to the world’s 10th largest freshwater lake, the Lake Winnipeg. Conversion of large areas of annual crop land to perennial forages has been propo…
View article: Simulating the hydrological impacts of land use conversion from annual crop to perennial forages in the Canadian Prairies using the Cold Regions Hydrological Model
Simulating the hydrological impacts of land use conversion from annual crop to perennial forages in the Canadian Prairies using the Cold Regions Hydrological Model Open
The Red River is one of the largest contributing sources of discharge and nutrients to the world’s 10th largest freshwater lake, the Lake Winnipeg. Conversion of large areas of annual crop land to perennial forages has been proposed as a s…
View article: Seasonal Changes in Phosphorus in Soils and Vegetation of Vegetated Filter Strips in Cold Climate Agricultural Systems
Seasonal Changes in Phosphorus in Soils and Vegetation of Vegetated Filter Strips in Cold Climate Agricultural Systems Open
Vegetated filter strips (VFS) are a best management practice, designed to reduce sediment and nutrient runoff to surface waters in agricultural landscapes. In cold climates, phosphorus (P) can be released from VFS vegetation when it underg…
View article: An Overview of Crop and Crop Residue Management Impacts on Crop Water Use and Runoff in the Canadian Prairies
An Overview of Crop and Crop Residue Management Impacts on Crop Water Use and Runoff in the Canadian Prairies Open
Although crop and crop residue management practices are mainly used for increasing crop yield, they and the resulting changes in crop growth affect one or more hydrological components, including runoff. Based on published research in the C…
View article: Crop responses to topsoil replacement within eroded landscapes
Crop responses to topsoil replacement within eroded landscapes Open
Approaches to restore productivity to eroded soils are urgently needed to sustain food security. We evaluated plant response to soil‐landscape rehabilitation, in which approximately 15 cm of topsoil was moved from depositional landscape po…