Rapid and Inexpensive Steam Distillation Method for Routine Analysis of Inorganic Nitrogen in Alkaline Calcareous Soils

Akhtar, Muhammad Saleem; Hussain, F.; Qureshi, Tariq Mahmood; Ashraf, Muhammad; Akhter, Javed; Haq, Ansar ul

doi:10.1080/00103624.2011.558961

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…There was slightly variation in clay content (241–305 g kg −1 ) and organic matter content (6.7–12.5 g kg −1 ) among soil series. Other scientists working on the laboratory analytical procedures also mentioned variability in physico‐chemical properties of agricultural soils …”

Section: Resultsmentioning

confidence: 99%

“…Prior to any fertiliser treatment, the soil samples from the experimental sites were collected/analysed (Table ) for texture, organic matter, lime content (CaCO 3 ) and pH and electrical conductivity (EC) in 1:1 soil/water suspension, while the available N (NH 4 + NO 3 ) was determined by the MgO–Devarda's alloy method as described by Akhtar et al Available soil P, i.e. Olsen's P, was determined by shaking a soil–NaHCO 3 suspension (1:20) for 30 min in a reciprocal shaker, and using extracts to develop a blue colour as described by Watanabe and Olsen …”

Section: Methodsmentioning

confidence: 99%

“…Other scientists working on the laboratory analytical procedures also mentioned variability in physico-chemical properties of agricultural soils. 24,25 Grain yield Phosphorus application from either source significantly increased grain yield and 1000-grain weight of wheat when compared with control (zero P); whereas the treatment induced increases (over control) were found variable for different soils. At all the studied sites, increases (% over control) were higher in PA treatment than that occurred in granular fertiliser treatments (Fig.…”

Section: Description Of Experimental Soilsmentioning

confidence: 99%

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Improving phosphorus uptake and wheat productivity by phosphoric acid application in alkaline calcareous soils

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Description Of Experimental Soilsmentioning

confidence: 99%

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Improving phosphorus uptake and wheat productivity by phosphoric acid application in alkaline calcareous soils

et al. 2016

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“…Before analysis, samples were sieved below 2 mm. The amount of N tot was determined using the modified Kjeldahl method (ISO 11261:1995) and the SOC was measured using wet digestion using the Tyurin method [50,51]. Briefly, during the measurement process, the total nitrogen content (N tot ) of the samples is converted first into (NH 4 ) 2 SO 4 and then into NH 3 .…”

Section: Soil Chemical Property Measurementsmentioning

confidence: 99%

Influence of Pig Slurry Application Techniques on Soil CO2, N2O, and NH3 Emissions

et al. 2022

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Greenhouse gas (GHG) emissions from agricultural soils can accelerate climate change, therefore, different soil fertilization techniques should be assessed before application to reduce GHG emissions. Pig slurry applications can greatly influence soil carbon dioxide (CO2), nitrous oxide (N2O), and ammonia (NH3) emissions of arable fields; thus, it is important to find site-specific techniques to lessen any negative environmental impacts. In this study, we examined the short-term effect of pig slurry application techniques of spreading and injection on soil greenhouse gas and NH3 emissions under different irrigation amounts. We used the dynamic chamber method with in-situ gas analyzers. Our study showed that there were elevated emissions during the first week after slurry application; however, the difference between GHG emissions of spreading and injection treatments were not significant. Elevated GHG emissions (213–338% and 250–594% in the case of CO2 and N2O emissions, respectively) were observed under dry circumstances compared to irrigated treatments, as well as significantly higher NH3 emissions occurred for surface spreading under non-irrigated (dry) circumstances compared to other treatments. There were no statistically significant differences between the soil chemistry of different application techniques. However, pig slurry increased the available nitrogen forms (ammonium- and nitrate-nitrogen), which caused N2O and NH3 peaks regardless of treatment type. Leachate chemistry was more affected by irrigation strategies than application techniques. Our study highlights the importance of soil conditions at the time of application, rather than the application technique for fertilization using pig slurry.

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“…Distillation is a very simple, rapid, and reliable technique for the termination of nitrate. However, the amount of energy required by the unit compared with the small volume of water produced limits the distillation to certain applications [7]. The reverse osmosis process has a drawback as the actual removal rates depend on the initial quality of the water, the system pressure, and the water temperature [8].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of nitrate ions from aqueous solution using modified biodegradable-based hydrogel

Khalek¹,

Mahmoud²,

Shoukry³

et al. 2019

Desalination and Water Treatment

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This study aims to remove nitrate (NO 3 −) ions from aqueous solutions using biodegradable-based adsorbents. For this purpose (Chitosan/Gelatin/2-(N,N-Dimethylamino) ethyl methacrylate) (Cs/Gltn/ PDMAEMA) hydrogel was prepared by gamma irradiation. The prepared hydrogel was modified using thiourea by converting the hydroxyl groups into thiol groups to form (Cs/Gltn/PDMAEMA)treated. Moreover, the SiO 2 trapped in Cs/Gltn/PDMAEMA hydrogel to perform Cs/Gltn/PDMAEMA/ SiO 2 composite was also prepared. The swelling behavior of the prepared adsorbents was studied as functions of time and pH. Batch adsorption experiments were performed to study the effects of various operating parameters such as initial pH, contact time, initial ions concentration and temperature on the adsorption of NO 3 − ions. The result showed that the best adsorption capacity was obtained at pH 2 within 100 min and the optimum sorbent dosage was 10 g/L. The adsorption capacities were ordered in sequence of Cs/Gltn/PDMAEMA/SiO 2 composite followed by Cs/Gltn/PDMAEMA-treated then Cs/Gltn/PDMAEMA hydrogel. The rates of adsorption were found to follow the pseudo-second-order model. It was found that Freundlich's equation fits the adsorption better than the Langmuir's equation. The free energy of adsorption (∆G°), enthalpy (∆H°), and entropy (∆S°) changes were calculated to predict the nature of adsorption.

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Rapid and Inexpensive Steam Distillation Method for Routine Analysis of Inorganic Nitrogen in Alkaline Calcareous Soils

Cited by 5 publications

References 16 publications

Improving phosphorus uptake and wheat productivity by phosphoric acid application in alkaline calcareous soils

Improving phosphorus uptake and wheat productivity by phosphoric acid application in alkaline calcareous soils

Influence of Pig Slurry Application Techniques on Soil CO2, N2O, and NH3 Emissions

Adsorptive removal of nitrate ions from aqueous solution using modified biodegradable-based hydrogel

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