Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Soil-Zone"”.
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A Model for Simulating Soil-Zone Processes at the Regional Scale
The soil zone has been described as the upper most region of the vadose zone where plant and soil processes enhance storage and permeability, providing a fast pathway for water and solutes to streams. The soil zone connects the land surface to the deeper unsaturated and saturated zones. Modeling of …
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THE INFLUENCE OF PULSE CROPS ON SOIL PHOSPHORUS AVAILABILITY TO SUBSEQUENT WHEAT CROPS IN THE BROWN SOIL ZONE OF SASKATCHEWAN
… vs. cereal stubble is due to differences in soil phosphorus (P) availability. The influence of pulse crops on soil P availability and P uptake by subsequent wheat (Triticumaestivum L.) crops was assessed in a series of laboratory experiments and field studies conducted in the Brown soil zone …
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Zinc fertilization of lentil in Saskatchewan to increase yield and grain zinc content
… of three rates (0, 2.5 and 5 kg Zn ha-1) of soil applied ZnSO4 were examined at a site in the Brown soil zone identified as Zn deficient and a site in the Dark Brown soil zone that was identified as sufficient in soil Zn. In 2014, hard red spring wheat was seeded to assess the residual …
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Intensive management of barley in Saskatchewan
… three levels of N (0, 50 and 100 kg ha-1) above soil test recommendations, two levels of ethephon (0 and 0.24 kg ha-1) and two levels of propiconazole (0 and 0.125 kg ha-1). Varieties used in ICM tests were Bonanza, Samson, Leduc, Virden, Johnston and Heartland. The second experiment, comprised …
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Isotopic composition of dissolved inorganic carbon in underground mine discharges of the northern appalachian basin
… from coal and shale, organic carbon from the soil zone, or biogenic methane. Parameters describing hydrogeologic setting resulted in distinct statistical clusters separating fully-flooded, partially-flooded, and free-draining sites. Hydrogeochemical results show evidence of calcite …
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The effect of oily waste and nutrient amendments on soil fertility and oat growth
… conducted with a sandy, marginal agricultural soil from the Brown soil zone near Richmound, Saskatchewan. The objective of the study was to determine how oily waste from heavy oil upgrader affects soil fertility, plant growth and microbial activity under controlled environmental conditions. The …
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Improving Nitrogen Management in Corn- Wheat-Soybean Rotations Using Site Specific Management in Eastern Virginia
… of within-field yield-limiting factors such as soil physical properties and fertility, the adoption of SSM is hindered by high gridsampling cost. Many Virginia corn-wheat-soybean farms have practiced generating yield maps using yield monitors for several years even though few variable …
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ROTATION EFFECT OF PULSE CROPS ON NITROGEN FIXATION AND CARBON INPUT TO SOIL
… (BNF) and provide greater carbon (C) inputs to soil than non-pulse crops in rotation. The goal of this research was to estimate the BNF and C input to soil by various pulse crops (chickpea, lentil and field pea) grown in rotation with pulse crops and non-pulse crops. Soil cores from three crop …
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Development of hydrogel tracer beads and comparative tracer tests to better understand contaminant fate and transport in karst systems
… the land surface, lack of filtration through a soil zone, and rapid transmission along solutionally-enhanced flowpaths. These factors also allow for aquifer contamination by direct injection of immiscible organic compounds in the form of non-aqueous phase liquids (NAPLs). The fate and transport …
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The long-term effects of farming practices on soil quality, as influenced by farmer attitude and farm characteristics
… farming systems, in a region of the Dark Brown soil zone west of Saskatoon, were investigated to identify farming practices that are soil-conserving, or soil-degrading, by measuring their effects on soil quality. The study identified soil properties that are practical and measurable indicators …
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Establishment, Forage Production and Drought Resistance of Native Perennial Legumes of the Canadian Prairies
… legume-grass mixtures and their effect on soil fertility are expected to be greatly influenced by growth environment, but many questions remain for native legume variability and performance in mixtures in semi-arid environments for forage production. Field research on four native legume …
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Drivers and Barriers to Producer Adoption of Climate Resilient Pea Varieties in the Western Canadian Prairies
… to be variable between technologies, growing zones, and producer experience with pea. Sub-sample analysis by soil zone and grower type yielded significant but variable results regarding the impact of uncertainty behaviours. Risk, loss, and ambiguity aversion influenced the perceived utility of …
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Temporal Dynamics of Groundwater Flow Direction in a Glaciated, Headwater Catchment
Shallow groundwater flow in the critical zone of steep headwater mountain catchments is often assumed to mimic surface topography. However, groundwater flow is influenced by other variables, such as the elevation of the water table and subsurface hydraulic conductivity, which can result in temporal …
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Experimental and numerical investigations to assess the behaviour of a buried pipeline in areas with high geological instability
… such as landslides, fault movements, soil liquefaction which may be caused by seismic activity are one of the most dangerous phenomena that can involve buried pipelines, e.g. for oil and gas transportation, or water and sewage. This aspect is currently an important part of research and …
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Evaluation of Swath Grazing Simple and Complex Polycrop Mixtures on Forage Biomass and Quality, Beef Cow Performance and Enteric Methane Emissions, System Economics and Soil Health Characteristics
… forages for grazing as they may promote soil health, plant biodiversity and nutritive value. A 2-yr grazing study (2022 and 2023 for yr 1 and 2, respectively) was managed at the Livestock and Forage Center of Excellence (LFCE), Forage and Cow-Calf Research and Teaching Unit (FCCRTU) …
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Soil Water Depletion and Water Use Efficiency of Wheat and Pea in Saskatchewan
Understanding the distribution of soil water and roots in soil profiles and their relationship to root water uptake (RWU) patterns is important for developing “water smart” rotations. In the semi-arid prairies, the introduction of pea into a rotation with cereals can help mitigate the influence of …
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Evaluating Performance of Hybrid Geosynthetic-Reinforced Retaining Walls
… field tests. The wall facing and the foundation soil were modelled as a linearly elastic material and the retained soil was modelled as a linearly elastic perfectly plastic material with the Mohr Coulomb (MC) failure criterion. The behavior of the backfill soil in the reinforced soil zone was …
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Feeding the soil to feed the planet: soil health outcomes from novel amendments to residue management
Healthy soils are the foundation for the continued capacity of agricultural lands to supply essential ecosystem services while also meeting demands for food, fuel and fiber. From academia to policymakers and other key stakeholders, attention towards soil health continues to rise due to global …
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Novel forage legumes for sustainable summer pasture mixtures in Saskatchewan
… grass species at AAFC SCRDC-Swift Current (Brown soil site) and AAFC Saskatoon (Dark Brown soil site), Saskatchewan. Experiment 2 evaluated forage dry matter yield (DMY), quality, grazing animal preference and performance, and cost-benefits analysis of binary legume-grass mixtures at AAFC …