scholarly journals Planting trees and amending with waste increases the capacity of mine tailings soils to retain Ni, Pb and Zn

2014 ◽  
Vol 4 ◽  
Author(s):  
Verónica Asensio Fandiño ◽  
Flora A. Vega ◽  
Rubén Forján ◽  
Emma F. Covelo
Keyword(s):  
Sorption Capacity ◽  
Soil Ph ◽  
Mine Tailings ◽  
Cation Exchange Capacity ◽  
Inorganic Carbon ◽  
Exchange Capacity ◽  
Tree Planting ◽  
Batch Adsorption ◽  
Organic And Inorganic Carbon ◽  
High Concentrations

The sorption capacity for Ni, Pb and Zn of mine tailings soil with and without reclamation treatment (tree planting and waste amendment) was evaluated using the batch adsorption technique. It is important to determine the capacity of waste-amended soils to retain Ni, Pb and Zn, as the sludges used usually have high concentrations of these metals. The results obtained in the present study showed that the untreated mine tailings soil had a low capacity for Ni, Pb and Zn retention. The sorption capacity for Pb increased significantly in all of the treated soils, without any significant differences between them. The treatment that most increased the sorption capacity for Ni and Zn was planting with trees and amending with waste simultaneously, as this increased the concentration of both organic and inorganic carbon, exchangeable calcium, soil pH and effective cation exchange capacity

scholarly journals Residual effect of sewage sludge fertilization on sunflower yield and nutrition

2015 ◽  
Vol 19 (10) ◽  
pp. 1005-1011 ◽  
Author(s):  
Hermann C. de Albuquerque ◽  
Geraldo R. Zuba Junio ◽  
Regynaldo A. Sampaio ◽  
Luiz A. Fernandes ◽  
Fabiano B. S. Prates ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Block Design ◽  
Residual Effect ◽  
Exchange Capacity ◽  
Growth Characteristics ◽  
Randomized Block Design ◽  
Calcium And Magnesium ◽  
Potential Acidity

ABSTRACTThis study aimed to evaluate the residual effect of sewage sludge fertilization on yield and nutrition of sunflower in its second cycle. The experiment was carried out from April to August 2012. The treatments consisted of four doses of sewage sludge (0, 10, 20 and 30 t ha-1, dry basis) applied in the first cycle of sunflower, distributed in a randomized block design, with six replicates. Sunflower stem diameter, plant height, capitulum diameter and yield increased with the increment in sewage sludge doses, with maximum values observed with the dose of 30 t ha-1. The contents of calcium and magnesium in the soil, pH, sum of bases, effective and potential cation exchange capacity and base saturation increased, while potential acidity and the contents of manganese and iron in the leaves decreased, with the increment in the residual doses of sewage sludge. There was a reduction in yield and growth characteristics of sunflower in the second cycle; thus, additional fertilization with sewage sludge is recommended in each new cycle.

scholarly journals Crop Response to Soil Acidity Factors in Ultisols and Oxisols in Puerto Rico. XII. Tomatoes

1969 ◽  
Vol 69 (3) ◽  
pp. 357-365
Author(s):  
Edmundo Rivera ◽  
José Rodríguez ◽  
Fernando Abruña
Keyword(s):  
Puerto Rico ◽  
Cation Exchange ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Soil Acidity ◽  
Exchange Capacity ◽  
Crop Response ◽  
Exchangeable Al

The effect of acidity factors of two Ultisols and one Oxisol on yield and foliar composition of tomatoes was determined. Yields were not markedly reduced by acidity in the Ultisols until pH dropped to around 4.6 with 45% Al saturation of the cation exchange capacity (CEC), and no yield was produced at about pH 4.1 and 80% Al saturation. In the Oxisol, tomato yields dropped steadily from 39.7 t/ha, when there was no exchangeable AI, to 17.5 t/ha at the highest level of acidity, pH 4.4 and 43% AI saturation. In all soils, yields were closely correlated with soil pH, exchangeable Al and Ca and Al/Ca.

ETUDE SUR LA VALEUR DES CRITERES CHIMIQUES PROPOSES PAR LA COMMISSION PEDOLOGIQUE DU CANADA POUR LA CLASSIFICATION TAXONOMIQUE DES SOLS DU QUEBEC

1977 ◽  
Vol 57 (3) ◽  
pp. 233-247 ◽  
Author(s):  
ROGER W. BARIL ◽  
THI SEN TRAN
Keyword(s):  
Cation Exchange ◽  
Soil Ph ◽  
Classification System ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Taxonomic Classification ◽  
Single Test ◽  
Ph Dependent ◽  
Extractable Al

Correlations were made among chemical criteria used for taxonomic soil classificaton. The compared tests were: oxalate Δ (Fe + Al), pyrophosphate-extractable (Fe + Al), oxalate-extractable Al, pH-dependent cation exchange capacity (ΔCEC), ratios of pyrophosphate-extractable (Fe + Al) over clay or over dithionite-extractable (Fe + Al), and finally soil pH measured in 1 M NaF. Significant correlations were found among various measured parameters. However, no single test was found to be reliable as a single criterion when applied to the taxonomic classification of Quebec soils. The two chemical tests, pyrophosphate-extractable (Fe + Al) and its ratio over clay, combined with morphologic criteria appeared useful for classifying Quebec Podzols. A few soils, which presented discrepancies from chemical criteria were found difficult to classify, thus suggesting the possibility of establishing new sub-groups in the Canadain soil taxonomic classification system.

scholarly journals Influence of brick manufacturing on phosphorus and sulfur in different agro-ecological soils of Bangladesh

2017 ◽  
Vol 29 (2) ◽  
pp. 123-131
Author(s):  
Reshma Akter ◽  
Md Jamal Uddin ◽  
Md Faruque Hossain ◽  
Zakia Parveen
Keyword(s):  
Organic Matter ◽  
Cation Exchange ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Clay Content ◽  
Exchange Capacity ◽  
Soil Samples ◽  
Maximum Accumulation ◽  
Brick Kilns ◽  
Total P

A study was carried out to evaluate the effects of brick manufacturing on phosphorus (P) and sulfur (S) concentrations in soil and plant collected from different distances of brick kilns in four AEZs of Bangladesh. Forty eight composite soil samples (0 - 15 cm depth) were collected from 48 points in 12 different sites at 0 m, 300 m, 800 m and 1500 m from brick kilns, where most (site 2, site 3, site 5, site 6, site 7, site 9 and site 10) of the brick kilns used coal for brick burning purposes. Plant samples (rice straw and different vegetables) were also collected from the respective fields except 0 m distances. Significantly (p ? 0.05) lower organic matter, cation exchange capacity, clay content and soil pH were found at 0 m distances compared to other distances. Highest concentration of total P in soil were recorded at 0 m distances and these concentrations decreased with increasing distances from the brick kilns in most of the sites; whereas available P is significantly lower at 0 m distances than that of other distances. Total and available concentration of S in soil followed the trend 0 m>300 m>800 m>1500 m. Maximum accumulation of P (69.15 mg kg-1) and S (0.14%) in plant was found at 800 m away from the brick kiln.Bangladesh J. Sci. Res. 29(2): 123-131, December-2016

The ameliorative effects of low-grade palygorskite on acidic soil

Soil Research ◽  
2020 ◽  
Vol 58 (4) ◽  
pp. 411
Author(s):  
Jin-Hua Yuan ◽  
Sheng-Zhe E ◽  
Zong-Xian Che
Keyword(s):  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Soil Amendment ◽  
Acid Soil ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Acidic Soil ◽  
Low Grade ◽  
Incubation Experiments ◽  
Acid Neutralisation

Mineral composition and alkaline properties of palygorskite (Pal), and its ameliorative effects on chemical properties of acid soil were investigated. Dolomite was the main form of alkali in Pal and the acid neutralisation capacity of Pal was 215 cmol kg–1. Incubation experiments indicated that Pal incorporation increased soil pH, cation exchange capacity, base saturation and exchangeable K+, Na+, Ca2+ and Mg2+ contents, and decreased the levels of exchangeable H+, Al3+ and acidity, over a 1-year period. The ameliorative mechanisms were the dissolution of major alkaline matter in Pal (i.e. dolomite), and the exchange between released Ca2+ and Mg2+ with H+ in acidic soil. Hence, Pal can be used as a moderate acidic soil amendment.

EXTRACTABLE AND PLANT-AVAILABLE ZINC IN HORIZONS OF SEVERAL FRASER RIVER ALLUVIAL SOILS

1974 ◽  
Vol 54 (2) ◽  
pp. 125-132 ◽  
Author(s):  
MATT K. JOHN
Keyword(s):  
North Carolina ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Soil Profiles ◽  
Fraser River ◽  
Zn Content ◽  
Zinc Concentrations ◽  
Available Zinc ◽  
Extractable Zn

Total Zn and seven measures of extractable Zn in horizons of seven soil profiles declined with increasing depth of sampling within the profile. Although not invariabily found, some extractants removed more Zn from the deepest horizons of some profiles than from the horizon sampled immediately above. This distribution pattern was more pronounced for extractable than total Zn. From 27 horizon samples containing an average of 108 ppm total Zn, 2 N MgCl2, DTPA, North Carolina, Morgan, N KCl, acidic NH4Ac, and 0.01 M CaCl2 extractants solubilized an average of 4.14, 3.77, 3.37, 1.99, 1.82, 1.64, and 0.69 ppm Zn, respectively. Extractable Zn values were positively correlated with total Zn, organic matter, percentage clay, and cation-exchange capacity, but inversely related to soil pH, base saturation, and percentage sand. Zinc concentrations in corn and in oats grown on the horizon samples were best correlated with amounts extracted by 2 N MgCl2, acidic NH4Ac, and N KCl. Regressions on extractable Zn and soil pH accounted for as much as 74 and 55% of variations in Zn content of corn and oats, respectively.

Soil pH and Cation Exchange Capacity Affects Sunflower Tolerance to Sulfentrazone

2004 ◽  
Vol 18 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Gregory W. Kerr ◽  
Phillip W. Stahlman ◽  
J. Anita Dille
Keyword(s):  
Cation Exchange ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Dry Matter ◽  
Exchange Capacity ◽  
Treated Soil ◽  
Sunflower Plant ◽  
Greenhouse Study ◽  
Leaf Chlorosis ◽  
Over Time

Effects of soil pH and cation exchange capacity (CEC) on sunflower tolerance to sulfentrazone were investigated in a greenhouse study. Variables were soil pH (7.0, 7.3, 7.5, and 7.8), soil CEC (8.2, 13.7, 18.4, and 23.3 cmol/kg), and sulfentrazone rate (0, 105, 158, and 184 g ai/ha). Sulfentrazone-induced leaf chlorosis was affected by soil pH at 12 d after planting (DAP), but plants recovered, and earlier differences were not visible 9 d later. At 12 DAP, leaf chlorosis was 3 or 4% more severe in soils with pH 7.3 or higher compared with soils with pH 7.0 when averaged over both sulfentrazone rate and soil CEC. Leaf chlorosis resulting from sulfentrazone rates of 105, 158, and 184 g/ha was 17, 25, and 35% less at 23 cmol/kg than at 8.2 cmol/kg, respectively. Differences in chlorosis among sulfentrazone rates were greatest in soil with low CEC and lessened as soil CEC increased. Plants regained normal color over time, and newly emerging leaves were not affected. However, plant dry weights were reduced when sulfentrazone rate was ≥158 g/ha. Averaged over sulfentrazone rate and soil pH, sunflower dry weights were less when soil CEC was 8.2 compared with a CEC of 13.7 cmol/kg or higher, indicating a greater response at low CEC. Sunflower plant dry matter was not different in sulfentrazone-treated soil with a CEC above 13.7 cmol/kg. At the ranges tested, soil CEC had a considerably greater effect than did pH on sunflower tolerance to sulfentrazone.

scholarly journals Soil Health Assessment of Two Regenerative Farming Practices on Sandy Soils

2019 ◽  
Vol 8 (4) ◽  
pp. 61
Author(s):  
Nan Xu ◽  
Jehangir H. Bhadha ◽  
Abul Rabbany ◽  
Stewart Swanson
Keyword(s):  
Cation Exchange ◽  
Soil Ph ◽  
Active Carbon ◽  
Cation Exchange Capacity ◽  
Soil Health ◽  
Sandy Soils ◽  
Exchange Capacity ◽  
Farming Practices ◽  
Cover Cropping ◽  
Water Holding

The addition of organic amendments and cover cropping on sandy soils are regenerative farming practices that can potentially enhance soil health. South Florida mineral soils present low soil quality due to their sandy texture and low organic matter (OM) content. Few studies have focused on evaluating the effects of farm-based management regenerative practices in this region. The objective of this study was to evaluate changes in soil properties associated with two regenerative farming practices - horse bedding application in combination with cover cropping (cowpea, Vigna unguiculata), compared to the practice of cover cropping only for two years. The soil quality indicators that were tested included soil pH, bulk density, water holding capacity, cation exchange capacity, OM, active carbon, soil protein and major nutrients (N, P, K). Results indicated no significant changes in soil pH, but a significant reduction in soil bulk density and a significant increase in maximum water holding capacity for both practices. Cation exchange capacity and the amounts of active carbon increased significantly after 1.5-year of the farming practices. Horse bedding application with cover cropping showed a significant 4% increase in OM during a short period. A significant increase in plant-available P was also observed under these two practices. Based on this study, horse bedding application as an organic amendment in conjunction with cover cropping provides an enhanced soil health effect compared to just cover cropping. As local growers explore farming option to improve soil health particularly during the fallow period using regenerative farming practices on sandy soils, these results will assist in their decision making.

Sustainable use of wetland soils in the eastern region of Uganda around Lake Victoria Basin

2011 ◽  
Vol 6 (3) ◽  
Author(s):  
J. Zake ◽  
J. Y. Z. Kitungulu ◽  
H. Busurwa ◽  
F. Kyewaze
Keyword(s):  
Organic Matter ◽  
Cation Exchange ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Lake Victoria ◽  
Exchange Capacity ◽  
Buffering Capacity ◽  
Wetland Soils ◽  
Lake Victoria Basin ◽  
Eastern Uganda

Wetlands are not wastelands but wealth lands, which are widely distributed throughout Uganda currently covering 11% of the total land area. They are accessible to a large proportion of the population. As the country's population grows, people increasingly convert wetlands for other land uses such as farming, settlement among others thus making it difficult to enforce legislation for their protection, sustainable management and utilization. Their profound importance to both humans and wildlife calls for a concerted effort to ensure their sustainable utilization and attempts should be made to promote sustainable development of such wetlands with adequate considerations being given to human and environmental requirements. This study was therefore carried out to determine the effect of drainage on organic matter levels and on soil chemical changes in wetland soils in eastern Uganda around the Lake Victoria basin. Secondly, to assess potential lime requirements for drained wetland soils in eastern Uganda around the Lake Victoria basin, this would reflect on wetland soil buffering capacity. In green house studies it was found that drainage of wetland soils led to a reduction of organic matter relative to soil structure and where sulfur and iron were present in large amounts, drainage caused decrease in soil pH to moderately acidic levels; but in cases where exchangeable bases were present in large amounts there was an increase in soil pH. Lime requirements were greater where the amount of clay, organic matter and cation exchange capacity were high. Consequently, such wetland soils had a high buffering capacity. It was concluded that wetland soils should be characterized in terms of potential of acidification, level of organic matter, nutrient content, cation exchange capacity, soil texture and levels of trace elements. Decisions to drain or not to drain should depend on these parameters and other socio-economic considerations for the area.

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