scholarly journals Effect of Bone Char application in Reducing CO2 Emission and Improvement Organic Matter in Calcareous Soils

2020 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Maher Saleh ◽  
Ahmed El-Refaey ◽  
Yasser Eldamarawy
Keyword(s):  
Organic Matter ◽  
Co2 Emission ◽  
Calcareous Soils ◽  
Bone Char ◽  
Reducing Co2 Emission

scholarly journals Soil fertility status of some of the intensive crop growing areas under major agroecological zones of Bangladesh

2016 ◽  
Vol 41 (4) ◽  
pp. 735-757 ◽  
Author(s):  
NC Shil ◽  
MA Saleque ◽  
MR Islam ◽  
M Jahiruddin
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Calcareous Soils ◽  
Clay Content ◽  
Soil Samples ◽  
Exchangeable K ◽  
Low Level ◽  
Fertility Status ◽  
Agroecological Zones ◽  
High Level

Laboratory studies on soil fertility evaluation was carried out across major agroecological zones (AEZs) of Bangladesh to know the nutrient status of soils and to relate those with soil properties like pH, organic matter, CEC, and clay content. Thirty five composite soil samples were collected from intensive crop growing sites, which covered 17 AEZs of Bangladesh. After proper processing, the samples were analyzed for texture, pH, organic carbon, CEC, exchangeable cations (K, Ca, Mg and Na), total N, available P and S following standard methods. The textural class of the soils collected from AEZ 12 and 13 appeared to be mostly clay. Clay loam soil was found in AEZ 4, 8, 9, 11, 25 and 28. Loamy soil was seen in AEZ 1 while AEZ 22, 23 and 29 were mostly sandy textured. The results revealed that 65.7% of the tested soil was acidic while 25.7% was alkaline in nature. All the tested soils showed lower pHKCl compared to pHH2O thus possessed negative charge. About 68.6% of the collected soils contained low (1.10-1.70%) level of organic matter, 25.7% soils retained it at medium level (1.71-2.40) and 5.7% soils at very low level (<1.0%). All the tested soils appeared to be deficient (< 0.12%) in nitrogen content. 68.6% soil samples had the low level of available P while only 8.6% retained it an optimum amount. About 80% of the tested soils contained low level of available S (7.9- 14.7 mg kg -1) although coastal regions soils hold higher amount of available S. High CEC (20-38 cmol kg-1) was found in clay rich soils of AEZ 10, 11, 12, and 13. Study revealed that 40% of the collected soils were very low, 31.4% were low, 8.6% each of medium and optimum, and 11.4% contained high level of exchangeable K. The calcareous soils (AEZ 10, 11, 12 and 13) contained very high level of Ca. Non calcareous soils also showed fairly good level of Ca content except AEZ 1, 3, 23 and 29. Sandy textured soils of greater Dinajpur, Rangpur, Moulvibazar showed lower level of exchangeable Mg. About 86% of the tested soils had the lower (< 2%) potassium saturation percentage (KSP), which needs K application for sustainable crop production. Estimate showed that 44% variability for CEC may be attributed by clay content and the relationship was significant (p = 0.05). Again, 50.4 and 65.6% variability in exchangeable K and Mg, respectively may be governed by clay content of the soils, while such relationship for Ca was non-significant. CEC may contribute 62.2, 92.3 and 83.9% variability for exchangeable K, Ca and Mg content in soils, respectively. The fertility status of most of the studied soils (except AEZ 10, 12, 13 and to some extent 11) appeared to be low to very low, which demand judicious management in order to achieve food security and to conserve the soil fertility.Bangladesh J. Agril. Res. 41(4): 735-757, December 2016

Modeling of Carbon Dioxide Measurement on Cement Plants

2012 ◽  
Vol 610-613 ◽  
pp. 2120-2128 ◽  
Author(s):  
Jun Xia Peng ◽  
Liang Huang ◽  
Yu Bo Zhao ◽  
Pan Chen ◽  
Lu Zeng ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Footprint ◽  
Carbon Dioxide Emissions ◽  
Co2 Emission ◽  
Firing Process ◽  
Input Output ◽  
Carbon Dioxide Measurement ◽  
Key Steps ◽  
Furnace Slag ◽  
Reducing Co2 Emission

Input-output model on cement plants were established. Carbon dioxide emissions of key steps and carbon footprint of products were calculated and predicted using the input-output model. The results showed that CO2 emission in the plant (the production of the plant is 1320000t a year) reached 910000 t a year and CO2 emission per ton product is 0.689 ton. Over 80% of the total CO2 was emitted during the process of firing，so the firing process is the key step for reducing CO2 emission in the cement plant. Carbon footprint of three kinds of cement products including ordinary portland cement, portland pozzolan cement and portland blast furnace slag cement are 0.76, 0.59, 0.72 respectively.

scholarly journals INFLUENCE OF FARMYARD MANURE ON RETENTION AND AVAILABILITY OF NICKEL, ZINC AND LEAD IN METAL-CONTAMINATED CALCAREOUS LOAM SOILS

2017 ◽  
Vol 25 (3) ◽  
pp. 289-296 ◽  
Author(s):  
Muhammad Abbas AZIZ ◽  
Hamaad Raza AHMAD ◽  
Dennis L. CORWIN ◽  
Muhammad SABIR ◽  
Khalid Rehman HAKEEM ◽  
...  
Keyword(s):  
Organic Matter ◽  
Retention Time ◽  
Farmyard Manure ◽  
Calcareous Soils ◽  
Field Capacity ◽  
Soil Samples ◽  
Continuous Irrigation ◽  
Moisture Contents ◽  
Nickel Zinc ◽  
Chloride Salts

Continuous irrigation of soils with untreated effluents can result in the accumulation and translocation of some metals in the soils and plants. Application of farmyard manure (FYM) to such soils may increase or decrease their availability and retention time. Calcareous soils contaminated with 100, 200, and 400mg kg–1 Ni, Zn, and Pb as chloride salts were used, and farmyard manure added (40g kg–1 for 90 days) with moisture contents at field capacity. Soil samples were drawn at 30 day intervals, and metals extracted with (AB-DTPA) C14H23NO3O10. With FYM application of 400 mg kg–1, Ni availability increased from 179 (day 30) to 240 mg kg–1(day 90); Zn from 163 (day 30) to 230 mg kg–1 (day 90), but, Pb decreased from 214 to 161 mg kg–1. FYM forms multi-dentate complex which greatly enhances the Ni and Zn solubility, and organic matter immobilizes Pb in the soil.

Carbon and nitrogen balances and CO2 emission after exogenous organic matter application in arid soil

2019 ◽  
Vol 10 (1) ◽  
pp. 23-36 ◽  
Author(s):  
Rayda Chaker ◽  
Kamel Gargouri ◽  
Hadda Ben Mbarek ◽  
Sameh Maktouf ◽  
Assunta Maria Palese ◽  
...  
Keyword(s):  
Organic Matter ◽  
Co2 Emission ◽  
Arid Soil ◽  
Carbon And Nitrogen

Relationship between soil composition and retention capacity of terbumeton onto chalky soils

2009 ◽  
Vol 6 (3) ◽  
pp. 245 ◽  
Author(s):  
Achouak El Arfaoui ◽  
Stéphanie Sayen ◽  
Eric Marceau ◽  
Lorenzo Stievano ◽  
Emmanuel Guillon ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Properties ◽  
Environmental Fate ◽  
Organic Matter Content ◽  
Calcareous Soils ◽  
Matter Content ◽  
Soil Composition ◽  
Retention Capacity ◽  
Wide Range ◽  
Soil Components

Environmental context. The wide use of pesticides for pest and weed control contributes to their presence in underground and surface waters, which has led to a continuously growing interest in their environmental fate. Soils play a key role in the transfer of these compounds from the sprayer to the water as a result of their capacity to retain pesticides depending on the soil components. The knowledge of soil composition should enable one to predict pesticide behaviour in the environment. Abstract. Eight calcareous soils of Champagne vineyards (France) were studied to investigate the adsorption of the herbicide terbumeton (TER). A preliminary characterisation of the soil samples using X-ray diffraction (XRD), elemental and textural analyses, revealed a wide range of soil properties for the selected samples. The adsorption isotherms of TER were plotted for all samples. The determination of soil properties, which significantly correlated with the Kd distribution coefficient, allowed identification of organic matter and CaCO3 as the two main soil components that govern the retention of the herbicide. Organic matter was the predominant phase involved in the retention but its role was limited by the presence of calcite. Finally, the ratio of CaCO3 content to organic matter content was proposed as a useful parameter to predict the adsorption of terbumeton in chalky soils. The evolution of Kd as a function of this ratio was successfully described using an empirical model.

Contributions of carbonates to soil CO2 emissions

2012 ◽  
Vol 92 (4) ◽  
pp. 599-607 ◽  
Author(s):  
R. Ramnarine ◽  
C. Wagner-Riddle ◽  
K. E. Dunfield ◽  
R. P. Voroney
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Inorganic Carbon ◽  
Calcareous Soils ◽  
Decomposition Analysis ◽  
Isotope Ratio Mass Spectrometry ◽  
Conventional Tillage ◽  
Isotopic Signature ◽  
Soil Samples ◽  
Soil Carbonates

Ramnarine, R., Wagner-Riddle, C., Dunfield, K. E. and Voroney, R. P. 2012. Contributions of carbonates to soil CO 2 emissions. Can. J. Soil Sci. 92: 599–607. Carbon dioxide (CO2) is released in soil as a by-product of microbial and root respiration, but soil carbonates may also be a source of CO2 emissions in calcareous soils. Global estimates of inorganic carbon range from 700 to 900 Pg as carbonates stored in soils, representing a significant potential source of CO2 to the atmosphere. While previous studies have focused on the total CO2 efflux from the soil, our goal was to identify the various sources and their contribution to total CO2 emissions, by measuring the isotopic signature of the CO2 emitted from the soil. Calcareous Luvisolic silt loam soil samples were obtained from conventional tillage (CT) and no-tillage (NT) plots in southern Ontario, Canada. Soil samples (root- and residue-free) were laboratory-incubated for 14 d and the isotopic signature of the CO2 (δ13CCO2) released was analyzed using isotope ratio mass spectrometry. Isotopic measurement was essential in quantifying the abiotic CO2 production from carbonates, due to the unique δ13C signature of carbonates and soil organic matter. A two-end member mixing model was used to estimate the proportion of CO2 evolved from soil carbonates and soil organic matter decomposition. Analysis of emitted CO2 collected after the 14-d incubation indicate that the proportion of CO2 originating from soil inorganic carbon was 62 to 74% for CT soil samples, and 64 to 80% for NT soil samples. Further work is recommended in the quantification of CO2 emissions from calcareous soils, and to determine the transferability of laboratory results to field studies.

scholarly journals Optical and molecular-level characterization of fluvial organic matter biodegradation in a highly urbanized river system

2017 ◽  
Author(s):  
Most Shirina Begum ◽  
Hyojin Jin ◽  
Inae Jang ◽  
Jung-Min Lee ◽  
Han Bin Oh ◽  
...  
Keyword(s):  
Water Pollution ◽  
Organic Matter ◽  
Optical Properties ◽  
Co2 Emission ◽  
Molecular Level ◽  
River System ◽  
Agricultural Runoff ◽  
Han River ◽  
Ft Icr Ms ◽  
Ft Icr

Abstract. Rapid urbanization worldwide is changing both the transport of organic matter (OM) and CO2 emission in urban streams and rivers, yet little is known as to how the altered quality of riverine OM affects biodegradation and CO2 emission. The relationships between the chemical properties and biodegradation of riverine OM, including dissolved and particulate OM (DOM and POM), were examined against the level of anthropogenic perturbation along the Han River, a river system in South Korea that has been highly modified by dams and urban water pollution. DOM optical properties and biodegradable dissolved organic carbon (BDOC), together with in situ measurements of the partial pressure of CO2 (pCO2) using a membrane-enclosed sensor, were compared between the up-, mid-, and downstream reaches of the Han River and three urban tributaries in a basin-scale field campaign combined with a 7 day incubation of both filtered and unfiltered samples. Another 5 day incubation was conducted with unfiltered water samples from a downstream river site and an urban tributary, in isolation and mixed (1 : 1), to measure changes in dissolved CO2 concentrations at 10-min intervals and BDOC and optical properties at intervals of 1–2 days. Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS) was used to detect molecular-level changes in DOM composition between the initial and post-incubation samples. The average BDOC concentration in the urban tributaries was 4–12 times higher than those of three mainstem reaches, while BDOC was highly variable at three downstream sites and tended to be higher at the mainstem sites affected by agricultural runoff or dams than at the forested headwater stream. Longitudinal increases in protein-like and microbial humic-like fluorescence, fluorescence index (FI), and biological index (BIX) reflected increasing inputs of anthropogenic DOM along the downstream reach and urban tributaries. These optical indices, along with pCO2, were significantly correlated with BDOC concentrations measured at 12 sites. The cumulative CO2 production measured in the second incubation was greatest in the mixture, followed by the urban tributary and mainstem samples in the descending order. The amount of CO2 produced in the mixture was greater than the BDOC measured in the same sample or the average of CO2 produced in the separate samples, indicating a mixing-enhanced biodegradation of DOM including the fraction transformed from soluble components of POM. FT-ICR-MS analysis revealed a much larger number of molecules consumed (3984) than those produced (771) during the incubation of the mainstem sample in contrast to the produced molecules (2789) exceeding the consumed molecules (1479) in the tributary sample, indicating a high rate of OM processing in the urban tributary that might be limited in the availability of immediately consumable organic materials. Overall results suggest that water pollution, along with impoundment effects of dams, can alter the optical properties and biodegradability of both DOM and POM in highly urbanized watersheds to such a degree that can induce a priming effect on OM biodegradation and CO2 emission.

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