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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 20 of 52 for “"aggregate stability"”.
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A comparison of methods for evaluating aggregate stability of mountain soils
… wet sieving, and waterdrop impact -- of testing aggregate stability was made. Soil samples were selected from 9 sites representing a wide variety of great soil groups in the Colorado Front Range of the Rocky Mountains at elevations ranging from 5,000 to 11,000 feet. Samples of the top of the A …
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Influence of Vineyard Floor Management Practices on Soil Aggregate Stability, Total Soil Carbon and Grapevine Yield
<p> Soil aggregates provide pore spaces of various sizes supplying water, gases and nutrients to plant roots and microorganisms, and facilitate moisture retention and availability. Soil aggregate stability is indicative of soil biological and structural health, and is increased by soil carbon …
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Long-term Residue and Water Management Effects on Soil Respiration and Soil Aggregate Stability in a Wheat-soybean, Double-crop System in Eastern Arkansas
… level (high and low) on soil respiration and aggregate stability in a wheat- (Triticum aestivum L.) soybean [Glycine max (L.) Merr.], double-crop system in a silt-loam soil (Aquic Fraglossudalf) in the Mississippi River Delta region of eastern Arkansas after more than six years of consistent …
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A fresh soil health perspective: Soil health dynamics and improved measurement techniques
… history. Of the analyzed parameters, only 2-4 mm aggregate stability and magnesium showed high responsiveness and consistency in identifying tillage and cover crop effects. None of the parameters detected treatment differences in all sites or at all times, yet samples collected after high biomass …
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A comparison of soil properties and plant-to-plant variability in no-till and strip-till corn fields in Illinois
… penetration resistance, bulk density, water aggregate stability, infiltration rate) that could be influencing the differences in root efficiencies and nutrient uptake observed under ST and ii) determine if variability differs between ST and NT for linear distance between plants, plant height, …
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Soil conditioner effects on soil erosion, soil structure and crop performance
… slopes and penetrometer resistance and increased aggregate stability and drainage capacities. Responses in a winter wheat crop (cv. Beaver) included apparent suppressed seedling emergence, followed by apparent enhanced growth and development. Initial laboratory studies indicated conditioner …
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Measuring and Understanding Effects of Prescribed Fire in a Headwater Catchment
… fire effects on soil properties (particle size, aggregate stability, and chemistry), stream discharge, and fine-scale water chemistry dynamics. Findings demonstrated some significant differences following fire in soil properties (e.g., overall decrease in aggregate stability, general decreases in …
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No-Till Tomato Production
… weight, weed emergence, soil bulk density, soil aggregate stability, and soil organic carbon content were measured and compared. Yields and soil tests in both treatments were similar while weed emergence in the tilled plots was significantly higher than in no-till plots. The results may help …
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Effects of tillage and mulching on selected soil properties, growth and yield of sunflower (Helianthus annuus L.)
… rate (IR), cumulative infiltration (CI) and aggregate stability (AS). Sunflower plant parameters including plant height, leaf area index, dry matter at flowering stage (FS), total biomass at harvest maturity stage (HMS), head diameter, head dry weight, seed weight and grain yield were …
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Quantificação de coprólitos de minhocas nativas em latossolo amarelo cultivado com braquiárias na ausência e presença de adubação mineral
In the formation of soils, aggregates formed occur because of natural factors of soil formation and aggregates sourced from alternative genetic processes, these are aggregated biogenic originate of the activity from soil macrofauna. The objective of this study was to evaluate the production and the …
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Long-term effect of crop rotation and tillage on soil properties
… (TN), and available phosphorus (P) and water aggregate stability (WAS) varied with treatment effects of rotation and tillage at Perry, but not at Monmouth, where soils had higher initial soil organic matter content. At Perry, TC, TN and P were greater at 0-10 cm depth under no-till, but were …
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Effects of polyacrylamide (PAM) and gypsum on irrigated and dryland potatoes (Solanum tuberosum L.).
… of any treatment on soil adherence to tubers. Aggregate stability was increased 24% by gypsum application. However, poor initial soil structure caused by years of intensive cultivation meant this only increased to 2.4% and was unlikely to have had any affect on crop growth and yield.
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Quality Soil Management in Illinois Using Winter Cover Crops
… Soil physical properties analyzed were water aggregate stability (WAS), bulk density (BD), penetration resistance (PR), total porosity (TP), pore size distribution, water retention properties, and saturated hydraulic conductivity (K sat). Compared to winter fallow, crop sequences that included …
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Soil genesis on relatively young surface mined lands in southern West Virginia
… depth of profile development and horizonation. Aggregate stability, hydraulic conductivity and soil color also showed significant variance with age. The mine soils were generally more fertile in those elements analyzed than the natural soils, and the A horizons of mine soils and the natural …
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Evaluating Conservation Agricultural Management for Soil Health Outcomes in Southeastern Virginia
… active carbon, short-term carbon mineralization, aggregate stability, and crop yield. These parameters were then correlated to determine drivers in soil health outcomes. Total organic carbon was increased in the strip tillage treatment (1.13% in 2021 and 1.61 % in 2022) compared to conventional …
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Characterization and quality of soils developing on a mountaintop removal coal mine
… thickness, solum thickness, and increased aggregate stability with time. Chemical analyses showed higher N with minesoil age. Minesoils had higher bases, pH, and base saturation than native soils, but native soils had higher carbon, nitrogen, aluminum, and manganese. Current accepted soil …
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Soil quality in long-term corn and soybean rotations
… year. We measured soil bulk density (BD), water aggregate stability (WAS), cation exchange capacity (CEC), soil organic matter (SOM), and plant-essential nutrients at the depths of 0-15, 15-30, 30-60, and 60-90 cm. Univariate and multivariate statistical analyses were conducted, including …
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Seal Development and Infiltration as Affected by Rainfall Kinetic Energy
… rainfall energy and intensity as well as soil aggregate stability. However, quantitative relationships between these parameters have not been reported in the literature. Therefore, this study was established to investigate the relationship between rainfall kinetic energy and infiltration into a …
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Characterization of legacy soil P and quantification of subsurface losses under artificial drainage
… by evaluating soil P stratification and dry aggregate stability in soils with and without a history of soil health practices, and 3) use concentration-discharge (C-Q) relationships, hydrograph separation, and the seasonal origin index (SOI) to identify pathways of subsurface P loss in a …
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Tillage and cover cropping effects on soil properties and crop production
… attributes included bulk density (BD), water aggregate stability (WAS), and penetration resistance (PR), as well as chemical properties of soil organic matter (SOM), total carbon stocks (TCs), pH, plant available nitrogen (TIN, NO3-N and NH4-N), available phosphorus (P), and exchangeable …
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