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Showing 1 to 20 of 90 for “"cation exchange capacity"”.
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Potassium availability in Parsons silt loam as influenced by soil drying and alteration of the cation exchange capacity
Call number: LD2668 .T4 1957 R43
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Potassium availability in Parsons silt loam as influenced by soil drying and alteration of the cation exchange capacity
Call number: LD2668 .T4 1957 R43
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Effects of certain fertilizer and manurial treatments on the cation exchange properties and organic matter content of dunmore silt loam
… 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 work …
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A constitutive model for the compression behavior of Old Alluvium
… measure of the microstructural changes using the Cation Exchange Capacity as a state variable. Upon load reversal, a model based on double layer theory is integrated to predict macroscopic volumetric expansion due to the swelling of the nontronitic clay fraction. This behavior is also linked to …
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Use of Lignite Fly Ash as a Soil Amendment
… analyzed for N, P, Ca, Mg, K, Na, Mn, Zn, pH, cation-exchange capacity, percent base saturation, and texture. Needle and root tissue analyses were performed on both live and dead seedlings. Survival and height growth were both adversely affected by fly ash amendments. Nearly all seedlings grown …
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Soil PH and clay content associated with chronic wasting disease in white-tailed deer in northern Illinois
… based on soil characteristics (soil texture, pH, cation exchange capacity, organic matter, and water content), then used the outcome to assess possible pathways by which soil characteristics increase the probability of transmission via environmental contamination. The model indicates CWD is likely …
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ΠΡΟΣΡΟΦΗΣΗ U, TH, BA ΚΑΙ CS ΑΠΟ ΟΡΥΚΤΑ ΤΗΣ ΑΡΓΙΛΛΟΥ ΚΑΙ ΣΥΝΘΕΤΙΚΑ ΟΡΥΚΤΑ-ΕΚΛΕΚΤΙΚΟΤΗΤΑ ΚΑΙ ΔΕΣΜΕΥΣΗ ΤΟΥ CS
… THE IONS WAS MUCH LOWER THAN ITS THEORETICAL CATION EXCHANGE CAPACITY. THE LATER IS ATTRIBUTABLE TO A BLOCKING OF VERMICULITE'S CATION EXCHANGE CAPACITY BY HYDROXY-TH ISLANDS ADSORBED IN INTERLAYER. THE ADSORPTION PHENOMENA ABEAR TO OBEY THE LANGNUIV TYPE AQUATION. THE SYNTHETIC MINERAL …
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Land treatment of grape-processing effluents near Robertson, Western Cape
… benefit the soil by increasing organic matter, cation exchange capacity and moisture retention capacity. Adverse effects can include salinisation of soils and groundwater, soil structural degradation and odours generated by anaerobic conditions.
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Effects of certain fertilizer and lime treatments on some chemical properties of Cecil sandy loam
… pH, organic matter content, total nitrogen, and cation exchange properties of the soil of the l8-year-old rotation plots at Chatham, Virginia, was carried out. Individual soil samples were taken of each of the 36 sub-plots which compose the experiment. After the chemical analyses were completed, …
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Hydrothermal synthesis and optimisation of zeolite Na-P1 from South African coal fly ash
… determined by evaluating the improvement in the cation exchange capacity of the product zeolite.The starting materials (fly ashes from Arnot, Hendrina and Duvha power stations) and the synthesized zeolite product were characterized chemically, mineralogically and morphologically by X-Ray …
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Effects of Land Disposal of Pulp Mill Effluents on Plant Nutrient Uptake and Element Balance
… increases from the effluent in sandy soil of low cation-exchange-capacity.</p>
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NATURALLY ACIDIC OR ANTHROPOGENICALLY ACIDIFIED? UNCOVERING THE DRIVERS OF STREAM ACIDITY DURING STORMFLOW IN THE NEE SOON CATCHMENT, SINGAPORE
Episodic acidification occurs as periods of high flow temporarily reduce the streams’ acid neutralizing capacity (ANC). In Singapore, the acidification of streams in the Nee Soon Swamp Forest (NSSF) is thought to have deleterious impacts on aquatic ecosystems. This research aims to understand …
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Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers.
… as soil amendments for plant growth, their cation exchange capacity (CEC) and slow-release fertilizer properties. Most work on slow-release fertilizers has focused on natural Clinoptilolite, Phillipsite and Chabazite. The aim of this study was to synthesize zeolites, study their …
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A study of the pH-dependent charge of a selection of highly weathered humic soils
… of which is believed partly to be a reduction in cation exchange capacity (CEC). At the same time the reduction in CEC would result in a decline in the soil's ability to retain cations. The reduction in CEC is said to result from the development of positive charge at low pH in soils with variable …
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A computer simulation model for investigating the effect of land application of sludge on runoff water quality
… occur in the soil following organic waste applications. CREAMS-NT accounts for nutrient addition through fertilization and rainfall and losses of N by volatilization, denitrification, plant uptake, leaching, and overland flow. Data required by CREAMS-NT includes runoff volume, sediment yield, …
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Steric Effects of Alkyl Ammonium Salts on the Combustion of Exchanged Smectite Clays
… was explored as a new method for determining the cation exchange capacity (CEC) of clays. Smectite clays were modified with several alkyl ammonium salts varying in number of carbons and the spatial orientation of the carbons about the central nitrogen atom. The clays used, standards purchased from …
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The effect of soil parameters on the bioavailability and retention of lead in rats
… study investigated the relationship between soil cation exchange capacity (CEC) and soil amendments (lime and phosphate) to the retention of lead in soil fed to rats. This study also related the amount of lead that can be extracted from in situ contaminated soils from a secondary smelter site to …
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An assessment of morphological, physical, chemical, and mineralogical properties of soils derived from volcanic deposits in Rwanda
… aluminum and allophane contents. Soil cation exchange capacity, organic C, water retention properties, and aluminum and iron associated with organic matter and allophane decrease whereas, pH and bulk density increase with elevation. Allophane content decreases whereas, halloysite …
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Soil quality in long-term corn and soybean rotations
… block design (RCBD), with three or four replications at six University of Illinois Crop Sciences research centers, at Urbana, Monmouth, Perry, Dixon Springs, DeKalb, and Brownstown, with all phases present each year. We measured soil bulk density (BD), water aggregate stability (WAS), cation …
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Natural transformation and growth inhibition of azotobacter vinelandii in the presence of adsorbed oxytetracycline
… to agricultural soil through land application of manure. Both can persist in the environment if adsorbed to soil grains, allowing potential for increased antimicrobial resistance in the soil microbial community. Oxytetracycline (OTC) is a commonly used antimicrobial in large-scale …
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