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Showing 1 to 20 of 112 for “"organic matter content"”.
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Effects of certain fertilizer and manurial treatments on the cation exchange properties and organic matter content of dunmore silt loam
An investigation of the pH, organic matter content, and cation exchange properties of the soil of the 26-year-old rotation and continuously cropped plots at Blacksburg, Virginia was carried out. Individual soil samples were taken of the eight sub-plots which represent each plot. After the chemical …
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Effects of soil moisture, soil carbonate and organic matter content on vapor phase sorption of volatile organic compounds using inverse gas chromatography
… the effects of soil moisture, carbonate, and organic matter content on VOC sorption. Sorption measurements were performed for ten VOC compounds: trichloroethylene (TCE); 1,1,1-trichloroethane (TCA); benzene; toluene; ethylbenzene; chlorobenzene; heptane; and pentane. Inverse Gas Chromatography …
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The effect of different fertilizer treatments on the nitrogen and organic matter content of a soil when cropped to a definite rotation for a period of twenty-four years
In a large part of the soil fertility studies that have been attempted in the past, a great number of the results obtained were based almost entirely on crop yields. These yields were used as the final criterion upon which to draw conclusions as to whether a given system of soil management was a …
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Near-infrared reflectance soil organic matter sensor
In-field sensing of soil organic matter content would be desirable to provide a control input for the variation of soil-applied herbicide application rates. Control based on organic matter content could eliminate overapplication on less productive areas within a field, thereby improving …
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Dynamics and Characterization of Soil Organic Matter on Mine Soils 16 Years after Amendment with Topsoil, Sawdust, and Sewage Sludge
… using the following key soil quality variables: organic matter content, aggregate stability, and mineralizable nitrogen, (ii) to determine the effects of these key soil quality variables on plant productivity, and (iii) to determine the comparative ability of trees and herbaceous plants to …
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Sorption and biodegradation of phenanthrene in soils
… but additional information on the behavior of organic chemicals in the subsurface environment is needed for effective remediation. The purpose of this study was to investigate the relationship between sorption and biodegradation on the ultimate fate of subsurface contaminants. Sorption and …
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Automatic Control of Chemical Application Rate With Soil Organic Matter and Travel Speed as Inputs (Microprocessor, Digital Control)
… chemical application rate according to the soil organic matter content and sprayer ground speed. Bypass nozzles were used to maintain uniform spray characteristics over a wide range of flow rates. The application rate was controlled by regulating the pressure of the bypass line with a pressure …
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ΤΑΞΙΝΟΜΗΣΗ ΚΑΙ ΕΚΤΙΜΗΣΗ ΠΕΔΙΝΩΝ ΕΔΑΦΩΝ ΛΕΥΚΟΚΑΛΛΙΕΡΓΕΙΑΣ ΣΤΗ Β. ΕΛΛΑΔΑ
… LIGHTTEXTURED SOILS, LOAMY SAND WITH RICH IN ORGANIC MATTER HORIZONS IN DEPTH MORE THAN 80CM, OR CLAY AND SILTY CLAY SOILS WITH ADEQUATE ORGANIC MATTER WITH GOOD AERATION AND MOISTURE CLASSIFIED IN THE II CLASS WHEN THE SURFACE OF GROUND WATER OCCURS BETWEEN 80CM AND 250CM, MEADIUM QUALITY …
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Oil shales: compaction, petroleum generation and expulsion
… to 2.4 g/cm³ with a strong correlation to organic matter content. Organic matter content is related to the oil shale grade used for economic assessment. The organic matter content strongly controls the behaviour of the oil shales including their mechanical properties. Existing data shows …
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Analysis of Soil Splash Erosion Under Simulated Rainfall
… was dependent upon soil type, with greater clay content soils exhibiting a greater threshold energy. Soil splash rate increased with increasing kinetic energy, with large differences between soils. Soil loss decreased with an increasing soil clay content and soil loss increased with decreasing …
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Relationships among nutrient concentrations in corn (Zea mays L.) plants and extractable soil nutrients
… and dilute HCl-H₂SO₄ extractable soil Mn, pH and organic matter content indicated coefficients of determinations of 0.993 and 0.990 for the 0-20.3- and 0-40.6-cm soil depths, respectively. These data suggest that the Mn test may be a good indicator of available soil Mn to corn plants. Hot water …
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Spatial and Temporal Trends in Greenhouse Gas Fluxes from a Temperate Floodplain along a Stream-Riparian-Upland Gradient
… between CO2 flux and soil temperature, organic matter content, and soil moisture, CH4 flux and pH, bulk density, inundation period length, soil temperature, and organic matter content. But minimal correlations between N2O flux and the measured variables. Spatially, our results …
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Determination and speciation of mercury in sediment and related samples from Greece and Scotland
… to vary seasonally or be related to sediment organic matter content. Sequential extraction indicated that Hg speciation - hence mobility - varied between sites. No Hg was detected in the fish Mugil Cephalus indicating no threat to humans from consumption. Total sediment Hg concentrations in …
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Benthic metrics as indicators of human disturbance in a marine-dominated lagoon
… (sandprawn abundance and condition factor), organic matter content and microphytobenthic biomass were compared between the two sites, comprising multiple subsites. Results showed minimal differences between disturbed and undisturbed sites, with the exception of organic matter content and …
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Analysis of multifunctional shelterbelt system in organic farm
… about multifunctional shelterbelt tree system on organic farm. Shelterbelt tree is supposed to reduce wind impact and accomplish micro climatic condition on the field. As a sequence, soil organic matter content and yield precentage demonstrates higher figure comparing with outer hedgegrow. . In …
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The suitability of rammed earth for construction in the Cape Town metropolitan area
… tests were undertaken to assess soil grading, organic matter content, plasticity and Optimum Moisture Content (OMC). Grading gave an indication of fines present and plasticity indicated the cohesive nature of the fines. More detailed tests were undertaken to determine type and level of soluble …
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An Experiment Assessing the Potential for Compost-Amended Lawn Topsoil to Inhibit Storm Quickflow
… and soil water retention in urban areas a matter of high importance. Lawns, forming a substantial fraction of suburban space, are a potentially useful medium in this regard. Four lawn test plots were constructed by the Toronto and Region Conservation Authority (TRCA) to examine the …
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Ecological assessments of Pseudomonas communities in pastoral soils: implications for disease suppression and sustainable production in agricultural grasslands
… functional gene abundance, with measures of soil organic matter quality, C:P ratio (nutrient stoichiometry), and aromaticity of the dissolved organic matter content (carbon recalcitrance). These associations between soil organic matter quality and soil disease suppressive communities were …
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The effect of the lime-molybdenum interaction on some properties of pasture soils
… any, in soil structure, earthworm populations, organic matter content, mineralisation of soil nitrogen, exchangeable manganese content, and phosphate fixing power of the soil due to treatment in the field with lime and with molybdenum.
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Soil texture determination by an acoustic cone penetrometer method
… should look into the effects of soil moisture content, bulk density, and organic matter content on the acoustic signal.
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