Gotowe bibliografie tematyczne / Soils Calcium content

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Gotowa bibliografia na temat „Soils Calcium content”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 28 stycznia 2023

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Artykuły w czasopismach na temat "Soils Calcium content"

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Cichota, R., I. Vogeler, N. S. Bolan, and B. E. Clothier. "Cation influence on sulfate leaching in allophanic soils." Soil Research 45, no. 1 (2007): 49. http://dx.doi.org/10.1071/sr06070.

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We have examined the influence of the ionic composition of the soil solution on the movement of sulfate and calcium in 2 New Zealand soils with differing allophane content. For this study, we have carried out a series of miscible displacement experiments using repacked and intact soil columns, in which sulfate was applied in the presence of either calcium or potassium as the accompanying cation. Our results showed that sulfate leaching was significantly retarded in the soil with higher allophane content when applied with calcium. On the other hand, no effects were observed for all studied soil
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Rogóż, Antoni, and Monika Tabak. "Contents of selected macroelements in soils, potatoes and fodder beets at variable soil reaction / Zawartość wybranych makroelementów w glebach oraz w ziemniakach i burakach pastewnych przy zmiennym odczynie gleby." Soil Science Annual 66, no. 1 (March 1, 2015): 3–9. http://dx.doi.org/10.1515/ssa-2015-0012.

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Abstract The aim of the research was to determine the concentration of selected macroelements in soil and in root crops (potatoes and fodder beets) at a variable soil reaction. The changes in pH values in the studied soils influenced the content of these elements in soluble forms determined in 0.1 mol HCl·dm-3. A statistical analysis showed a positive relationship between the soil pH value and the calcium and magnesium contents in a form close to the total form, as well as the content of soluble forms of phosphorus, calcium, and magnesium. The content of the studied macroelements, i.e. phospho
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Yildiz, Ercan, Mehmet Yaman, and Ahmet Sümbül. "RELATIONSHIPS BETWEEN PHYSICAL AND CHEMICAL PROPERTIES OF SOILS AND PLANT NUTRIENT CONTENT OF LEAVES IN THE APPLE ORCHARDS." Current Trends in Natural Sciences 11, no. 21 (July 31, 2022): 139–44. http://dx.doi.org/10.47068/ctns.2022.v11i21.016.

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This study was carried out in 42 orchards located in the lowland of Develi, where the apple cultivation is intense in Kayseri province. The analyses were made to determine pH, CaCO3, EC, organic matter, available phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), manganese (Mn) and copper (Cu) in soil samples and nitrogen (N), P, K, Ca, Mg, Fe, Zn, Mn, Cu, and boron (B) in leaf samples. In the study, the relationships between some physical and chemical properties of the soils and the plant nutrient content of the leaves were evaluated by correlation analysis. In
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PEKCAN, Tülin, Bihter ÇOLAK ESETLİLİ, Hatice Sevim TURAN, and Erol AYDOĞDU. "Determination of Nutritional Status of Northwest Anatolia (North Aegean) Olive Growing Areas." MAS Journal Of Applied Sciences 7, no. 11 (March 10, 2022): 210–20. http://dx.doi.org/10.52520/masjaps.221.

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The study was carried out to determine the productivity of olive plantations in 8 different districts of The North Aegean Region. For this purpose, soil and leaf samples were taken simultaneously from 26 different olive groves. 69.23% of the investigated surface soils (0-30 cm) are sandy loam, and 57.69% of the subsurface soils (30-60 cm) are sandy loam. It was determined that more than 50% of the soils were slightly alkaline and the lime contents were low at both depths. It is seen that the organic matter contents of 11% of the surface soils and 8% of the subsurface soils are low. Nitrogen co
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Al-Tarbouli, Nameer Hamed Yassin. "Adsorption and physicochemical release of iron ions in soils with different content of Calcium Carbonate and Calcium Sulfate." Tikrit journal for agricultural sciences 22, no. 3 (September 30, 2022): 137–47. http://dx.doi.org/10.25130/tjas.22.3.16.

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Three soils of different content of gypsum and lime were selected, the first soil (G1) and the second soil (G3), were obtained near the fields of the Faculty of Agriculture, Tikrit University. As for the third soil (G5), was taken from the AL- alam Village side east of Tikrit city to a depth of (0-10)cm. the proportions of gypsum were 5%, 15%, 25%, and the proportions of lime were 25%, 20%, and 10% for soils G1, G3, and G5, respectively. Ferrous sulfate was added as a source of iron ions added to the three soils in the following proportions (0,10,25,50,100,150,250,500,750) mg.L-1 The concepts
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Han, Guilin, Anton Eisenhauer, Jie Zeng, and Man Liu. "Calcium Biogeochemical Cycle in a Typical Karst Forest: Evidence from Calcium Isotope Compositions." Forests 12, no. 6 (May 25, 2021): 666. http://dx.doi.org/10.3390/f12060666.

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In order to better constrain calcium cycling in natural soil and in soil used for agriculture, we present the δ44/40Ca values measured in rainwater, groundwater, plants, soil, and bedrock samples from a representative karst forest in SW China. The δ44/40Ca values are found to differ by ≈3.0‰ in the karst forest ecosystem. The Ca isotope compositions and Ca contents of groundwater, rainwater, and bedrock suggest that the Ca of groundwater primarily originates from rainwater and bedrock. The δ44/40Ca values of plants are lower than that of soils, indicating the preferential uptake of light Ca is
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Loveland, P. J., J. Hazelden, and R. G. Sturdy. "Chemical properties of salt-affected soils in north Kent and their relationship to soil instability." Journal of Agricultural Science 109, no. 1 (August 1987): 1–6. http://dx.doi.org/10.1017/s0021859600080904.

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SummarySoil instability, as measured by the dispersion ratios of the reclaimed salt-marsh soils of ca. 70 km2 of north Kent, was assessed on samples taken from 0–15, 35–50 and 70–85 cm depths from sites at the intersects of a 250 m square grid or along transects. The dispersion ratios were related to other soil properties including exchangeable sodium, potassium and magnesium percentages, organic carbon content, calcium carbonate content and electrical conductivity. The dispersion ratio correlates most closely with exchangeable sodium percentage and organic carbon content; weaker correlations
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Neff, J. C., J. W. Harden, and G. Gleixner. "Fire effects on soil organic matter content, composition, and nutrients in boreal interior Alaska." Canadian Journal of Forest Research 35, no. 9 (September 1, 2005): 2178–87. http://dx.doi.org/10.1139/x05-154.

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Boreal ecosystems contain a substantial fraction of the earth's soil carbon stores and are prone to frequent and severe wildfires. In this study, we examine changes in element and organic matter stocks due to a 1999 wildfire in Alaska. One year after the wildfire, burned soils contained between 1071 and 1420 g/m2 less carbon than unburned soils. Burned soils had lower nitrogen than unburned soils, higher calcium, and nearly unchanged potassium, magnesium, and phosphorus stocks. Burned surface soils tended to have higher concentrations of noncombustible elements such as calcium, potassium, magn
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Elisa, A. A., S. Ninomiya, J. Shamshuddin, and I. Roslan. "Alleviating aluminium toxicity on an acid sulphate soils in Peninsular Malaysia with application of calcium silicate." Solid Earth Discussions 7, no. 4 (October 19, 2015): 2903–26. http://dx.doi.org/10.5194/sed-7-2903-2015.

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Abstract. A study was conducted to alleviate Al toxicity of an acid sulphate soils collected from paddy cultivation area in Kedah, Peninsular Malaysia. For this purpose, the collected acid sulphate soils were treated with calcium silicate. The treated soils were incubated for 120 days in submerged condition in a glasshouse. Subsamples were collected every 30 days throughout the incubation period. Soil pH and exchangeable Al showed positive effect; soil pH increased from 2.9 to 3.5, meanwhile exchangeable Al was reduced from 4.26 to 0.82 cmolc kg−1, which was well below the critical Al toxicity
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Zhong, Yuqing, Guanghua Cai, Shiquan Wang, Huajin Qin, Caihong Zhang, and Jiangshan Li. "Influence of Organic Content on the Mechanical Properties of Organic-Rich Soils Stabilized with CaO-GGBS Binder and PC." Water 14, no. 19 (September 28, 2022): 3053. http://dx.doi.org/10.3390/w14193053.

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Organic-rich soil is a typical special soil often encountered in foundation treatment. Previous research has revealed that Portland cement (PC) not only pollutes the environment but is significantly affected by organic matter during its hydration and cementation. Although quicklime (CaO)-GGBS binder (CG) is an effective alternative to PC, its efficiency in treating organic-rich soils has not been studied. In this study, organic-rich soil was treated with two binders of CG and PC. The physical, mechanical, and chemical characteristics of the stabilized soils were tested at various organic conte
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Rozprawy doktorskie na temat "Soils Calcium content"

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Baldock, Jeffrey Alexander. "Influence of calcium on the decomposition of organic materials in soils /." Title page, contents and introduction only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phb178.pdf.

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Ali, Abdul-Mehdi Saleh. "Reactions of urea phosphate in calcareous and alkaline soils: Ammonia volatilization and effects on soil sodium and salinity." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184694.

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Nitrogen (N) loss in the form of volatilized ammonia (NH₃) is a considerable problem when ammonium (NH₄⁺) forming fertilizers are applied to calcareous or alkaline soils. Large areas of agricultural land, contain alkalinity and salinity problems, are potentially suitable for crop production with little alteration. This study was conducted to determine and compare the effectiveness of urea phosphate (UP) in reducing soil alkalinity and NH₃ loss. The volatilization of NH₃ from UP and urea (U) was studied on 3 selected soils (Hayhook SL, Laveen L and Latene L) using an aeration system. Urea phosp
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Suriadi, Ahmad. "Structural stability and Na-Ca exchange selectivity of soils under sugarcane trash management." Title page, Contents and Abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ASOM/09asoms961.pdf.

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Muhammed, Rawaz Dlawar. "Etude en chambre d'étalonnage du frottement sol-pieu sous grands nombres de cycles. Application au calcul des fondations profondes dans les sols fins saturés." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066603/document.

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Ce travail de thèse porte sur l’étude du comportement de l’interface sol-pieu sous sollicitations cycliques dans les sols fins. Dans ce cadre, un important programme expérimental a été réalisé en chambre d’étalonnage, à partir d’une sonde-pieu et d’un piézocône testés dans des massifs d’argile saturée. Pour réaliser cette étude, on a, en particulier, développé un consolidomètre prototype pour la reconstitution des massifs d’argile. On s’est intéressé plus particulièrement, lors de chargements cycliques réalisés à déplacement contrôlé, aux évolutions du frottement local mobilisé à l’interface s
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Baldock, Jeffrey Alexander. "Influence of calcium on the decomposition of organic materials in soils / Jeffrey Alexander Baldock." Thesis, 1989. http://hdl.handle.net/2440/18962.

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Includes bibliographical references.<br>1 v. ; 30 cm.<br>The mechanism(s) by which calcium stabilises soil organic carbon against microbial attack was investigated in this study.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Soil Science, 1989
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Muneer, Muhammad. "Effect of calcium on the mineralization of organic carbon and stability of soil aggregates / by Muhammad Muneer." 1987. http://hdl.handle.net/2440/18532.

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Bibliography: leaves 172-189<br>xviii, 189 leaves : ill. (1 col.) ; 31 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Soil Science, Waite Agricultural Research Institute, 1987
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Muneer, Muhammad. "Effect of calcium on the mineralization of organic carbon and stability of soil aggregates / by Muhammad Muneer." Thesis, 1987. http://hdl.handle.net/2440/18532.

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Suriadi, Ahmad. "Structural stability and Na-Ca exchange selectivity of soils under sugarcane trash management." Thesis, 2001. http://hdl.handle.net/2440/110238.

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Cichota, Rogerio. "Modelling sulphate dynamics in soils : the effect of ion-pair adsorption : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Soil Science at Massey University." 2007. http://hdl.handle.net/10179/1443.

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Sulphur is an important nutrient to plants, and reports of its deficiency have been increasing worldwide. Sulphur starvation causes losses in both yield and quality, and it reduces nitrogen use efficiency of plants. As the timing for fertilisation can be decisive for avoiding deleterious effects, improvements in the description of the sulphur balance in fields are a valuable contribution for assisting fertiliser management. Sulphate is the most important inorganic form of sulphur in soils. Being the mobile form, sulphate is readily available for plants, and also prone to be leached. Therefore
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Książki na temat "Soils Calcium content"

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Greulich, Peter. Schwermetalle in Fichten und Böden im Burgwald (Hessen): Untersuchungen zur räumlichen Variabilität der Elemente Blei, Cadmium, Nickel, Zink, Calcium und Magnesium, unter besonderer Berücksichtigung des Reliefeinflusses. Marburg/Lahn: Im Selbtsverlag der Marburger Geographischen Gesellschaft, 1988.

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The distribution of calcium carbonate in soils: A computer simulation using program CALSOIL. [Denver, Colo.]: U.S. Dept. of the Interior, Geological Survey, 1986.

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Geological Survey (U.S.), ed. The distribution of calcium carbonate in soils: A computer simulation using program CALSOIL. [Denver, Colo.]: U.S. Dept. of the Interior, Geological Survey, 1986.

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Geological Survey (U.S.), ed. The distribution of calcium carbonate in soils: A computer simulation using program CALSOIL. [Denver, Colo.]: U.S. Dept. of the Interior, Geological Survey, 1986.

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Australian Soil Fertility Manual. CSIRO Publishing, 2006. http://dx.doi.org/10.1071/9780643100725.

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The Australian Soil Fertility Manual is a trusted guide to the safe use and handling of fertilizers. It describes the types of agricultural soils, how they are classified and the interaction of soil, water and nutrients. It also provides an insight into how plants utilise nutrients and the role that individual nutrients play in the process of plant growth.&#x0D; This edition has been revised to reflect an increased emphasis on the environmental fate of nutrients and appropriate management strategies. It also has additional information on soil physical, chemical, and biological properties and d
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Zachara, John Michael. A solution chemistry and electron spectroscopic study of zinc adsorption and precipitation on calcite. 1987.

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Laboratory data for calcic soils in central New Mexico: Background information for mapping Quaternary deposits in the Albuquerque Basin. Denver, Colo: U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Kacorzyk, Piotr. Wartość gospodarcza okrywy roślinnej gleby w aspekcie nawożenia oraz zdolności retencyjnej płytki gleby górskiej. Publishing House of the University of Agriculture in Krakow, 2018. http://dx.doi.org/10.15576/978-83-66602-33-5.

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The aim of the study was to assess the impact of method management of mountain soil on the quantity and quality of waste water, and the amount of mineral nutrients it contains. I have analyzed the water, that was moved through the soil profiles of 0-20 cm and 0-40 cm depth. I have also evaluated the floristic composition, the productivity of grassland and arable land, and the use of fertilizers by vegetation and soil chemical properties. I have found that the type of plant cover of the soil had a significant effect on the amount and chemical composition of water moving through the soil profile
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Części książek na temat "Soils Calcium content"

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Kuria, Peter, Josiah Gitari, Saidi Mkomwa, and Peter Waweru. "Effect of conservation agriculture on soil properties and maize grain yield in the semi-arid Laikipia county, Kenya." In Conservation agriculture in Africa: climate smart agricultural development, 256–69. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789245745.0015.

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Abstract Low and unreliable rainfall, along with poor soil health, is a main constraint to maize production in the semi-arid parts of Kenya that account for over 79% of the country's land area. In the vast county of Laikipia, farmers continue to plant maize despite the predominantly low quantities of precipitation. Participatory farmer experimentation with Conservation Agriculture (CA) was undertaken for six consecutive growing seasons between July 2013 and December 2016 to determine the effectiveness of CA as a method of improving soil properties and enhancing maize yields with the limited rainfall quantities received in these parts of Kenya. The main CA practices tested include chisel tine furrow opening (ripping) and live legume (Lablab purpureus) cover crop, as well as maize stover mulches, all implemented under varying inorganic fertilizer rates. The research was done across 12 administrative locations of Laikipia County where soils are mainly Phaeozems and Vertisols with a clay-loam texture. The research design used was researcher-designed and farmer-managed. In each of the 12 trial sites, participatory farmers' assessments and field days were carried out as a way of outreach to the bigger farming communities around the trial sites. The research findings obtained demonstrated that the use of CA impacts positively on soil properties and is a viable practice for enhancing maize yields in these moisture deficit-prone parts of the country. Soil chemical analysis assessment results showed that CA impacted positively on a number of soil mineral components including organic carbon, total nitrogen, phosphorus, potassium, calcium and pH. Midseason chlorophyll content assessment of the maize crop showed that there was good response to fertilizer application, as well as to mulching with crop residues for soil cover. Maize grain yield data also showed that the use of a CA package comprising chisel tine ripping combined with mulching by plant residues and use of mineral fertilizer resulted in a two- to threefold increase in grain yields above the farmer practice control. Mean maize grain yield in farmer practice plots was 1067 kg ha<sup>-1</sup> compared with the CA-treated plot with mineral fertilization that yielded 2192 kg ha<sup>-1</sup>.
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Reddy, Peddireddy Sreekanth, Bijayananda Mohanty, and Bendadi Hanumantha Rao. "Influence of Exchangeable Sodium and Calcium Contents on Consistency Limits of Expansive Soils: A Critical Review." In Lecture Notes in Civil Engineering, 299–306. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-5077-3_24.

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Egginton, Gwen M., and Ka Smith. "Relationships between soil mineral nitrogen content and denitrification, following application of slurry and calcium nitrate to grassland." In Nitrogen Fluxes in Intensive Grassland Systems, 75–83. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4394-0_7.

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Wang, J. H. "Lime Potential." In Chemistry of Variable Charge Soils. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097450.003.0015.

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The properties of hydrogen and aluminum ions have been examined in Chapters 10 and 11. These two ion species are ions that directly induce the acid reaction in soils. In soils devoid of soluble salts, the content of cations is constant and the negative surface charges are saturated by, besides hydrogen and aluminum ions, alkali metal and alkaline earth metal ions. These ions are called base ions. The acidity of a soil is determined chiefly by the ratio of the quantity of hydrogen and aluminum ions to that of base ions. Among these base ions, calcium ions occupy the most important position, because they generally account for 65-80% of the total amount of base ions in variable charge soils. Therefore, calcium is an ion species closely related to the acidity of soils. In addition to the parameter pH that directly reflects the concentration of hydrogen ions, one other desirable way is to find a parameter that can reflect the ratio of the hydrogen ions to the calcium ions. This parameter is the lime potential. Since the introduction of the concept of lime potential 40 years ago, little practical application has been made in soil science, although some further theoretical considerations were advanced in the 1950s and the 1960s. Actually, as shall be seen in this chapter, for strongly acid soils, such as variable charge soils, because the quantity of hydrogen ions is too high and at the same time the quantity of calcium ions is too low, lime potential that can reflect the relative ratio of these two ion species is of significance not only in theory but also in practice. The mathematical expression of lime potential is pH-0.5pCa. Lime potential is a simple function of the chemical potential of calcium hydroxide, lime. Hence it may be called lime potential. The physical meaning of pH-0.5pCa can be derived as follows.
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Leenheer, Jerry A., and Gary E. Maciel. "Preparation of Low-Carbon Sediments from the Mississippi River and Certain Tributaries for Solid-state CPMAS 13C NMR Analysis." In Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097511.003.0024.

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The nature of organic carbon in aquatic sediments and soils with low carbon contents and significant contents of paramagnetic elements such as iron and manganese is difficult to assess by solid-state, cross-polarization magic angle spinning (CPMAS) 13C nuclear magnetic resonance (NMR) spectrometry because of the inherent low sensitivity of 13C NMR analyses, and band broadening and sensitivity losses caused by paramagnetic elements. Other investigators have addressed this problem in the analysis of soils by enriching the organic carbon content by flotation, by magnetic separation of paramagnetic minerals, and by chemical reduction of iron by stannous chloride and sodium dithionite. In this study, they found that satisfactory 13C NMR spectra could be obtained if the C/Fe ratio was greater than 1 wt%. Each of the physical and chemical treatments used to increase the C/Fe ratio resulted in losses of organic matter and changes in the nature of organic matter through physical fractionation and chemical alteration. Suspended stream sediments frequently have equivalent contents of organic carbon and sesquioxide coatings with which the organic matter is associated. These sesquioxide coatings consist predominantly of iron and manganese oxyhydroxides that cause problems with NMR analyses. In this chapter we describe a method to enrich organic matter and remove iron and manganese from low-carbon sediments sampled from the Mississippi, Illinois, and Ohio Rivers with minimal loss and alteration of the organic matter. The second objective is to characterize the sedimentary organic matter by 13C NMR using recent advances that increase instrument sensitivity. Suspended and bed sediments were collected during a sampling cruise on the Mississippi River during May–June 1990. Fine bed sediments were collected in depositional regions of the river or tributaries with a pipe dredge. Suspended silts were collected using a continuous-flow centrifuge operated on board the Research Vessel Acadiana. Both bed sediments and suspended silts were freeze-dried prior to additional treatment procedures and NMR analyses. A flow chart of selective mineral dissolution procedures is presented in Figure 17.1. The acid pyrophosphate treatment6 was placed first in the sequence to remove calcium and magnesium minerals that would form insoluble oxalates in the following extraction.
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Kelly, Eugene F., and Caroline M. Yonker. "Soil Development and Distribution in the Shortgrass Steppe Ecosystem." In Ecology of the Shortgrass Steppe. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195135824.003.0007.

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Beneath the gently rolling, seemingly mundane topography that characterizes the shortgrass steppe is a complex mosaic of soils. Many of these soils are superimposed upon older, buried soils that formed in other millennia under different climatic regimes. The nature of this soil mosaic reveals much about the past and dictates much about the future of the shortgrass steppe. There is considerable heterogeneity among soils of the shortgrass steppe, yet they maintain a high degree of homogeneity when contrasted with soils of other ecosystems. The driving forces that make these soils alike are a semiarid climate and a resilient plant community ( P ielke and Doesken, chapter 2, this volume; and Lauenroth, chapter 5, this volume). The combined effects of vegetation and climate on soil development yield generally predictable results. Shortgrass steppe soils are characterized by the accumulation of organic matter in the surface (0–20 cm). Approximately 60% of the graminoid root mass resides in the - rst 10 cm of mineral soil (Schimel et al., 1986); 90% is contained in the surface 20 cm (Schimel et al., 1985). Surface horizons typically are darker hued than underlying horizons and have organic carbon contents that average 1% to 3% (Yonker et al., 1988). Shortgrass steppe soils maintain a high-percent base saturation (and high pH) because of low leaching and weathering potentials that result from semiarid conditions. Zones of secondary calcium carbonate accumulation are common in subsurface horizons and may appear as threads, seams, or nodules (Blecker et al., 1997). In addition, these soils are characterized by zones of secondary clay accumulation in subsurface horizons; clay accumulations are a result of either the in situ weathering of primary minerals or the translocation of clay minerals leached from the surface horizon. In either case, the maximum depth of accumulation gives some indication of the time-averaged depth of the wetting front in the soil pro- le (Blecker et al., 1997). The factors that produce considerable heterogeneity among the soils of the shortgrass steppe are related to parent material, the age of the soil, and the subtleties of topography. These factors vary at a - ner scale than either vegetation or climate.
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Pooley, Justin, and Martin Fey. "Soil Nutrient Deficiencies in an Area of Endemic Osteoarthritis (Mseleni Joint Disease) and Dwarfism in Maputoland, South Africa." In Geology and Health. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195162042.003.0032.

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Unusually high incidences of dwarfism and an endemic osteoarthritis, called Mseleni Joint Disease (MJD), occur on the flat, sandy coastal plain of Maputaland. This rare disease begins with stiffness and pain in the joints and progresses to varying degrees of disability, with some of the afflicted requiring aid in walking and others completely immobile. Almost 3% of local adults are dwarfs, while 38% of women and 11% of men have MJD (Fellingham 1973, Lockitch 1974). Medical studies since the 1970s have examined hematological, radiological, mycotoxicological, and genetic factors, and made comparisons with other diseases (Ballo 1996, Burger 1973, Lockitch 1973, Marasas 1986), yet have been fruitless in determining the etiology of MJD or the dwarfism. Dwarfism has been linked to Zn deficiencies in other areas and several bone-related disorders have been associated with P, Ca, and Mg deficiencies (Hidiroglou 1980). Calcium, Mg, Mn, and F deficiencies have all been speculated as possible causative factors of MJD (Fincham 1981, 1986), and the possibility of soil-derived nutrient deficiencies within this landscape is addressed. Maputaland is located on the northeast corner of South Africa, occupying an area about 50 by 100 km. It has a warm, subtropical climate, with summer rainfall occurring as cyclonic events, and varying from 1000 mm at the coast to 600 mm near Mseleni. Summer temperatures are high, averaging 29° C, and winters mild at 17° C. The region has high floral and faunal diversity and endemism (van Wyk 1996), and contains 15 major vegetation zones. Geologically, Maputaland is covered with recent Quaternary sands, with several north-south paleodune cordons parallel to the coast. There is little relief and, besides the coastal dunes reaching almost 200 m above mean sea level, the average elevation is 100 m. No rivers cross the plain, but groundwater is frequently exposed at the surface, as evidenced by Lake Sibayi and the numerous pans in the region. Soils are mostly the Waterton family of the Fernwood form (thermic, coated Typic Quartzipsamments) (SCWG 1991, USDA 1999). These sands are inherently infertile, vary in pH from neutral to acidic, have a low cation exchange capacity, low organic matter content, and are dominated in the clay fraction by kaolinite.
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Alves de Oliveira, Herbet, and Cochiran Pereira dos Santos. "Limestone Clays for Ceramic Industry." In Clay Science and Technology. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.92506.

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Limestone clays are used in the ceramic segment in the manufacture of bricks, ceramic tiles, and in the production of cement, among others. Limestone can be present in soils in pure form or as a contaminant, but always from marine environments. The limestone after burning can present a high loss of mass (35–45%), which can cause serious problems with the sintering of ceramic products such as bricks, tiles. The calcium or magnesium carbonate once dissociated forms calcium oxide (CaO) and releases carbon dioxide (CO2). CaO in contact with water subsequently experiences very high expansions that can cause cracks in the materials. Researchers have studied procedures to inhibit limestone action on clays as well as to set the correct temperature for firing. In this chapter, examples of clays with different percentages of calcium carbonate (CaCO3) that are used in the ceramic segment and their characteristics will be given.
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Massa Ismaël, Bamba, and Sorho Siaka. "The Toxicity of Environmental Pollutants." In The Toxicity of Environmental Pollutants. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104088.

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In view of the growing threat of trace metals to human health, this work set itself the objective of documenting the toxicity of the trace metals most in contact with humans on human health through food. Thus, this study revealed that organic matter, pH and CEC are the main soil parameters that influence the passage of trace metals from soil to plants. The study also revealed that agriculture, industry and road traffic contribute greatly to the input of trace metals into the environment. Regarding the mechanisms of toxicity, the study showed that chromium VI and copper manifested their toxicity by the formation of free radicals after reduction, those of zinc, nickel, manganese and nickel resulting from the disfunctioning of homeostasis. The study showed that lead caused toxic effects by replacing certain cations such as Ca2+, Mg2+, Fe2+, Na+ which have important functions in the cell. Cadmium expresses its toxicity by binding to albumin, thus altering the homeostasis of metals such as calcium. All these mechanisms have revealed both acute and chronic toxic effects.
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Malik, Junaid Ahmad. "Urban Solid Waste Management Techniques With Special Reference to Vermicomposting." In Advances in Environmental Engineering and Green Technologies, 53–79. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1966-0.ch003.

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The majority of municipal (urban) solid waste (MSW) is disposed of in landfills (anaerobic composting). However, this disposal system is reported to produce hazardous environmental impacts, and new policies are initiated to protect the environment from such impacts by discouraging the practice of disposal of solid waste in landfills. Eco-friendly disposal alternatives to landfills need to be explored. One of the technological options for treatment and disposal of organic solid wastes is vermicomposting. Instead of using conventional composting methods, the vermicomposting method can be used for the disposal of the waste. The enzymatic and microbial activities that occur during vermicomposting process by worms gives a better end product than using the conventional composting. Food waste will be recovered for vermicomposting, and the end products can be organic fertilizer, soil improver, and an alternative source of potential energy. Vermicomposting or vermiculture is an eco-friendly process whereby worms are used to breakdown the organic waste into soil and humus known as vermicast, vermicompost, or earthworm compost. The objective is to process the organic material as quickly and efficiently as possible. During the breakdown of organic matter by the earthworm, humus, which is a complicated material, is formed. The material formed is high in content of nitrogen, calcium, and phosphorus, which are the main elements required by plants for their growth, health, and freshness.
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Streszczenia konferencji na temat "Soils Calcium content"

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Bulimaga, Constantin, and Corina Certan. "Evaluarea impactului ecositemelor urbane asupra mediului în regiunea de dezvoltare economica Centru." In Impactul antropic asupra calitatii mediului. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975330800.04.

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Regardless of the fact that both urban ecosystems studied – Orhei and Telenești – have purification stations, they are still an essential source of surface water pollution. The aqueous soil extract (Telenești) has a pH value of 8 up to 9.8 due to the high content of calcium and potassium in the soil, due to the fact that the area under investigation has a specific character caused by the spread of solonetz-type soils, solonized chernozems, and salinated soils. The anthropogenic impact in urban ecosystems produces an imbalance in the ratio of spontaneous species and ruderal and ruderal-segetal
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Malikzada, Abdulmuner, Hasan Fırat Pulat, and İnci Develioğlu. "Effect of Fly Ash on Compaction Behavior of Alluvial Soil." In International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.016.

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Low plasticity, high bearing capacity, low settlement, etc. are the preferred properties for most engineering projects. Alluvial soils are problematic soils because of low bearing capacity, high organic matter content, and high void ratio so they do not meet the preferred condition for engineering projects. It has been necessary to improve unsuitable materials to make them acceptable for construction. Fly ash (FA) has earlier been used for stabilizing roads due to its high content of calcium and silicate oxides which give puzzolanic properties and thus high compression strength. In this resear
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Kuleshova, L. A., A. S. Kasakova, and I. S. Tatyanchenko. "INFLUENCE OF PRECURSORS ON THE CONTENT OF MINERAL PHOSPHORUS FRACTIONS IN THE SOILS OF RICE FIELDS IN THE ROSTOV REGION." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS Volume 2. DSTU-Print, 2020. http://dx.doi.org/10.23947/interagro.2020.2.704-708.

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The article is devoted to the problem of phosphoric nutrition of rice on chestnut soils of the northernmost zone of rice cultivation in Russia. The paper reveals the role of water-soluble fractions of phosphorus, aluminosilicates, iron phosphates and calcium phosphates in the nutrition of rice plants during the growing season. The influence of the previous culture on the content and consumption of these fractions was established.
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Labrador, Y., C. Chang, and J. Viloria. "Prediction of the Calcium and Magnesium Content in Soils through a Generalized Regression Neural Networks and Genetic Algorithms." In 2012 Eleventh International Conference on Machine Learning and Applications (ICMLA). IEEE, 2012. http://dx.doi.org/10.1109/icmla.2012.123.

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Skripnikov, P., and A. Nalivaichenko. "ACCUMULATION OF ORGANIC CARBON UNDER WOODY PLANT COMMUNITIES IN URBAN FORESTS OF ROSTOV-ON-DON." In Reproduction, monitoring and protection of natural, natural-anthropogenic and anthropogenic landscapes. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2022. http://dx.doi.org/10.34220/rmpnnaal2021_97-102.

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The paper provides an analysis of the vegetation state and soil cover of the "Temernitskaya Roscha" and the "Schepkinsky Les" artificial recreational forests which located in the Rostov-on-Don city. Geobotanical descriptions were carried out according to the standard method to species diversity assessing. The “Temernitskaya Roscha" recreational forests has been affected by anthropogenic pressure, but its grass cover was more diverse than in the "Schepkinsky Les" recreational forests where tree plant species was dominated. The study of the soil cover revealed a statistically significant increas
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PEKARSKAS, Juozas, Algirdas GAVENAUSKAS, Anželika DAUTARTĖ, and Aida STIKLIENĖ. "RECYCLING OF MINERAL SERPENTINITE WASTE FROM MINING INDUSTRY AND ITS USE IN AGRICULTURE TO IMPROVE SOIL AGROCHEMICAL PROPERTIES." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.102.

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The influence of processing the serpentinite quarry from the Caucasian mountains at the foot of the Mount Elbrus crushed waste on soil agrochemical properties, phytotoxicity of spring barley, influence on barley plant biomass and its chemical composition were investigated. Ground and granular serpentinite had a different effect on soil and plants. Application of serpentinite fertilizers significantly increased the content of calcium, iron, 227.95-376.75 and 5.05-9.62 mg kg-1, total and plant-derived magnesium 0.34-0.52 and 1.19-2.16 mg kg-1, lead and nickel, while the amount of copper dropped
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Karklina, Ilze, Zaiga Anna Zvaigzne, and Jelena Stola. "Chemical properties of needles as an indicator of nutrient status of fertilized coniferous stands." In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.012.

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Enhanced forest growth may respond to demand of woody resources and contribute to the climate change mitigation. Forest soil treatment with fertilizers, as well as drainage and thinning enhance forest growth. The analysis of needles is an established method in forest science to identify the nutrient status in the forest stand and need for forest soil enrichment with fertilizers. The aim of this research is to estimate the efficiency of forest soil enrichment with wood ash and ammonium nitrate in order to eliminate nutrient deficiency in forest stands. Forest soil was enriched with wood ash fer
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A R, Sindhu, Minukrishna P, and B. M. Abraham. "Experimental Study on the Impact of Type of Sulphate in Lime Stabilised Clays." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.14.

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Marine clays are distinguished by high compressibility and low shear strength. It has been reported that lime stabilisation is very much potent, and can be used as an ideal ground improvement technique in the case of marine clays. Cochin marine clays are sometimes abundant in primary and secondary sources of sulphates of sodium, lithium, potassium and calcium. Different types of sulphates may have different impact on lime stabilised clays. Present study investigates the effect of different types of sulphates in lime treated marine clays. Marine clay samples were collected by auger boring and a
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Raporty organizacyjne na temat "Soils Calcium content"

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Савосько, Василь Миколайович, Юлія Віліївна Бєлик, Юрій Васильович Лихолат, Герман Хайльмейер, Іван Панасович Григорюк, Ніна Олександрівна Хромих, and Тетяна Юріївна Лихолат. The Total Content of Macronutrients and Heavy Metals in the Soil on Devastated Lands at Kryvyi Rih Iron Mining & Metallurgical District (Ukraine). Geology-dnu-dp.ua, 2021. http://dx.doi.org/10.31812/123456789/4286.

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The relevance of the research is due to the need to develop technologies for phytoremediation of the devastated lands in the mining and metallurgical regions of Ukraine and the world. In this regard, the creation of tree plantations adapted to the ecological conditions of such territories is considered by many experts as the most promising option for innovative technologies. However, the development of artificial woodlands requires knowledge of the pedogeochemical character- istics of devastated lands. The aim of the work was to carry out a comparative analysis of the macronutrients and heavy
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Shenker, Moshe, Paul R. Bloom, Abraham Shaviv, Adina Paytan, Barbara J. Cade-Menun, Yona Chen, and Jorge Tarchitzky. Fate of Phosphorus Originated from Treated Wastewater and Biosolids in Soils: Speciation, Transport, and Accumulation. United States Department of Agriculture, June 2011. http://dx.doi.org/10.32747/2011.7697103.bard.

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Beneficial use of reclaimed wastewater (RW) and biosolids (BS) in soils is accompanied by large input of sewage-originated P. Prolonged application may result in P accumulation up to levelsBeneficial use of reclaimed wastewater (RW) and biosolids (BS) in soils is accompanied by large input of sewage-originated P. Prolonged application may result in P accumulation up to levels that impair plant nutrition, increase P loss, and promote eutrophication in downstream waters. This study aims to shed light on the RW- and BS-P forms in soils and to follow the processes that determine P reactivity, solu
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Litaor, Iggy, James Ippolito, Iris Zohar, and Michael Massey. Phosphorus capture recycling and utilization for sustainable agriculture using Al/organic composite water treatment residuals. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600037.bard.

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Objectives: 1) develop a thorough understanding of the sorption mechanisms of Pi and Po onto the Al/O- WTR; 2) determine the breakthrough range of the composite Al/O-WTR during P capturing from agro- wastewaters; and 3) critically evaluate the performance of the composite Al/O-WTR as a fertilizer using selected plants grown in lysimeters and test-field studies. Instead of lysimeters we used pots (Israel) and one- liter cone-tainers (USA). We conducted one field study but in spite of major pretreatments the soils still exhibited high enough P from previous experiments so no differences between
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Caritat, P. de, and U. Troitzsch. Towards a regolith mineralogy map of the Australian continent: a feasibility study in the Darling-Curnamona-Delamerian region. Geoscience Australia, 2021. http://dx.doi.org/10.11636/record.2021.035.

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Bulk quantitative mineralogy of regolith is a useful indicator of lithological precursor (protolith), degree of weathering, and soil properties affecting various potential landuse decisions. To date, no national-scale maps of regolith mineralogy are available in Australia. Catchment outlet sediments collected over 80% of the continent as part of the National Geochemical Survey of Australia (NGSA) afford a unique opportunity to rapidly and cost-effectively determine regolith mineralogy using the archived sample material. This report releases mineralogical data and metadata obtained as part of a
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