Sorption and desorption of mixed contaminants of BαP, Cr and Ni in clay loam and sandy loam soils

This study used laboratory experiments to compare the effects of coal tar creosote on the activity of oxidoreductive enzymes in sandy loam, loamy sand and sandy clay loam soils. Different amounts of coal tar creosote were added to soil samples as follows: 0 (control), 2, 10 or 50 g kg–1 dry matter. The activity of soil dehydrogenases (DHAs), o-diphenol oxidase (o-DPO), catalase (CAT), nitrate reductase (NR) and peroxidases (POX) was determined. Contamination of soil with coal tar creosote affected oxidoreductase activity. Oxidoreductive enzyme activity following soil contamination with coal tar creosote was in the following order: DHAs > CAT > NR > POX > o-DPO in loamy sand and in sandy loam; and DHAs > POX > CAT > NR > o-DPO in sandy clay loam. The index of soil oxidoreductive activity (IOx) introduced in this study confirms the negative effect of coal tar creosote on oxidoreductase activity in soil. DHAs were the most sensitive to the contamination of soil with coal tar creosote. Moreover, the greatest changes in oxidoreductase activities were observed in loamy sand. Knowledge of the mechanism underlying the effects of coal tar creosote on oxidoreductive processes may enable development of a method for the bioremediation of polycyclic aromatic hydrocarbon-contaminated soils.

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Field performance of three real-time moisture sensors in sandy loam and clay loam soils

Archives of Agronomy and Soil Science ◽

10.1080/03650340.2017.1393528 ◽

2017 ◽

Vol 64 (7) ◽

pp. 930-938 ◽

Cited By ~ 3

Author(s):

J. D. Jabro ◽

W.B. Stevens ◽

W. M. Iversen

Keyword(s):

Real Time ◽

Sandy Loam ◽

Field Performance ◽

Clay Loam

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TOLERANCE OF EARLY-MATURING SOYBEAN CULTIVARS TO METRIBUZIN

Canadian Journal of Plant Science ◽

10.4141/cjps86-016 ◽

1986 ◽

Vol 66 (1) ◽

pp. 125-130 ◽

Cited By ~ 6

Author(s):

G. H. FRIESEN ◽

D. A. WALL

Keyword(s):

Sandy Loam ◽

Controlled Environment ◽

Clay Loam ◽

Clay Loam Soil ◽

Soybean Cultivars ◽

Early Maturing ◽

Glycine Max L ◽

Loam Soil ◽

Environment Chamber ◽

Chamber Studies

McCall, Maple Presto, Maple Amber and OT80-3 soybean (Glycine max (L.) Merr.) cultivars were evaluated under field conditions for their response to metribuzin. Maple Amber was found to be less tolerant than the other cultivars. In controlled environment chamber studies, injury to this cultivar was more severe on a sandy loam soil than on a clay loam soil. Fall applications of metribuzin, alone or tank-mixed with trifluralin, were tolerant to Maple Amber soybeans and such applications may offer a practical alternative to spring treatments for broad spectrum weed control in the less tolerant soybean cultivars grown in Manitoba.Key words: Metribuzin, trifluralin, preplant incorporation, fall treatments, soybean cultivars

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Biochar Improves Plant Growth and Reduces Nutrient Leaching in Red Clay Loam and Sandy Loam

Hydro Nepal Journal of Water Energy and Environment ◽

10.3126/hn.v11i1.7221 ◽

2012 ◽

pp. 86-90 ◽

Cited By ~ 3

Author(s):

Kalpana Pudasaini ◽

Nanjappa Ashwath ◽

Kerry Walsh ◽

Thakur Bhattarai

Keyword(s):

Sandy Loam ◽

Vegetable Production ◽

Clay Loam ◽

Plant Establishment ◽

Clay Loam Soil ◽

Red Clay ◽

Green Waste ◽

Loam Soil ◽

Shoot Weight ◽

Water Holding

A factorial pot experiment was conducted using two types of soils (sandy loam and red clay loam) that are commonly used for commercial vegetable production in Bundaberg, region of Central Queensl and Australia. The soils were amended with 0, 25, 50 and 75 t/ha of green waste biochar and minimum doses of N, P and K (30 kg/ha, 30 kg/ha and 40 kg/ha respectively). After two weeks of plant establishment, the pots were leached with 1.5 litres of deionised water at week intervals, and cation concentrations of the leachate were determined. In 25 t/ha biochar treatment, there was a significant (P<0.05) reduction in K and Ca leaching by 40% and 26% respectively from sandy loam, and of Ca by 23% from the red clay loam. Soil water holding capacity and soil organic carbon were also increased in both biochar treated soils. After 12 weeks of growth, shoot weight was signifi cantly (P<0.05) higher in 25 t/ha biochar-treated sandy loam and red clay loam (32% and 31% respectively). These results clearly demonstrated that a higher yield of capsicum can be achieved from green waste biochar application in sandy loam and red clay loam at 25 t/ha biochar.DOI: http://dx.doi.org/10.3126/hn.v11i1.7221 Hydro Nepal Special Issue: Conference Proceedings 2012 pp.86-90

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Soil Persistence of Dinitramine

Weed Science ◽

10.1017/s0043174500061439 ◽

1980 ◽

Vol 28 (6) ◽

pp. 650-654 ◽

Cited By ~ 10

Author(s):

J. A. Poku ◽

R. L. Zimdahl

Keyword(s):

Mathematical Model ◽

Soil Moisture ◽

Field Data ◽

Soil Moisture Content ◽

Sandy Loam ◽

Clay Loam ◽

First Order ◽

Soil Persistence ◽

Herbicide Concentration ◽

Increasing Temperature

The effects of soil temperature, moisture, and herbicide concentration on the rate of degradation of dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) were measured in clay loam and sandy loam in the laboratory. In sandy loam, the rate of degradation increased with increasing temperature. In clay loam, the rate of degradation increased from 10 to 30 C and decreased at 40 C. Soil moisture content influenced the rate of degradation in the following order: 22>11>>2.2% (air-dry) for clay loam and 12.0 = 6.0>>0.5% (air-dry) for sandy loam. First-order half-lives ranged from 3.2 at 30 C to 47 weeks at 10 C in clay loam, and 2.3 at 40 C to 31 weeks at 10 C in sandy loam. Applications in 2 yr did not cause buildup of dinitramine in the field. A mathematical model was used in an attempt to correlate laboratory and field data.

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Persistence of fipronil and its metabolites in sandy loam and clay loam soils under laboratory conditions

Chemosphere ◽

10.1016/j.chemosphere.2012.12.054 ◽

2013 ◽

Vol 91 (11) ◽

pp. 1596-1603 ◽

Cited By ~ 15

Author(s):

Kousik Mandal ◽

Balwinder Singh

Keyword(s):

Sandy Loam ◽

Clay Loam ◽

Laboratory Conditions

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Characterization, classification and suitability evaluation of soils under sugarcane (Saccharum officinarum L.) cultivation at the Sugar Research Farm, University of Ilorin, Nigeria

Agro-Science ◽

10.4314/as.v20i3.3 ◽

2021 ◽

Vol 20 (3) ◽

pp. 14-23

Author(s):

O.N. Ajala ◽

T.A. Adjadeh ◽

J.O. Olaniyan ◽

T.O. Isimikalu ◽

E.K. Nartey ◽

...

Keyword(s):

Sandy Loam ◽

Saccharum Officinarum ◽

Exchange Capacity ◽

Clay Loam ◽

Soil Taxonomy ◽

Reference Base ◽

Suitability Evaluation ◽

Reconnaissance Survey ◽

World Reference Base ◽

The University

A reconnaissance survey conducted at the University of Ilorin Sugar Research Farm (USRF) revealed four dominant soils at Site 1 (USRF1) and one at Site 2 (USRF2). The soils were characterized and classified according to both the Soil Taxonomy (ST) and the World Reference Base for Soil Resources (WRB). Also, the suitability of the soils for sugarcane cultivation was evaluated using the limitation approach. While the USRF1 soils were reddish, the USRF2 soil was greyish due to poor drainage. The USRF1 soils were loamy sand with the AB-horizons of pedons II and III being gravelly. Pedon V had sandy loam surface, sandy clay loam subsurface and clay loam subsoil. The USRF1 soils were moderately acid while the USRF2 soil was slightly acid to slightly alkaline. Exchangeable calcium (Ca2+) content of the USRF2 soil which averaged 4.00 cmolc kg–1 was 2-3 times higher than that of the USRF1 soils. The USRF2 soil also contained higher Mg2+, K+ and Na+, 2-3 folds higher effective cation exchange capacity and > 10 folds higher soil organic carbon (with mean of 11.60 g kg–1) and total nitrogen (mean of 0.94 g kg–1). Under ST, pedons I and IV classified as Typic Haplustepts, II and III as Lithic Haplustepts and V as a Kanhaplic Haplustalf. Under WRB, pedons I and IV classified as Eutric Regosols (arenic), II and III as Endo-pisoplinthic Cambisols (arenic) and V as a Gleyic Lixisol (loamic). Pedon V was highly suitable (85.25%), I and IV moderately suitable (64.53%), II marginally suitable (47.40%) and III unsuitable (35.62%) for sugarcane cultivation.

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Soil quality and proposal for fertility improvement of arable soil in Rasina District

Acta agriculturae Serbica ◽

10.5937/aaser2151027s ◽

2021 ◽

Vol 26 (51) ◽

pp. 27-32

Author(s):

Biljana Sikirić ◽

Vesna Mrvić ◽

Olivera Stajković-Srbinović ◽

Vladan Ugrenović ◽

Darko Jaramaz ◽

...

Keyword(s):

Soil Fertility ◽

Sandy Loam ◽

Absorption Capacity ◽

Available Phosphorus ◽

Clay Loam ◽

Regular Control ◽

Exchangeable Ca ◽

High Concentrations ◽

Field Plots ◽

Very High

During the regular control of soil fertility in the Rasina District, it was established that the plots of land were distributed across Vertisol, Eutric Cambisol and Fluvisol types of soils, and to a lesser extent on Pseudogley and Ranker. The tested samples had different textures - sandy loam and loam, clay-sandy loam and clay loam, and clay. Plots of land that were of very acidic and acidic reactions were predominant, with medium amounts of humus, very low amounts of available phosphorus, and high amounts of available potassium. High or very high cation absorption capacity was found in about half of the examined fields; a deficient content of exchangeable Ca was recorded in 22% of plots and that of exchangeable Mg in 16% of plots, while an unfavorable Ca/Mg ratio was measured in 44% of plots. The overall sensitivity to acidification was mainly moderate (50.6% of plots) and strong (20.2% of plots). Very high concentrations of mobile Al, which could be toxic to plants, were found in 5 field plots.

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Modelling of Soil Respiration in Hungary

Agrokémia és Talajtan ◽

10.1556/agrokem.55.2006.1.7 ◽

2006 ◽

Vol 55 (1) ◽

pp. 59-68 ◽

Cited By ~ 1

Author(s):

Ferenc Ács ◽

H. Breuer

Keyword(s):

Soil Respiration ◽

Water Balance ◽

Air Temperature ◽

Sandy Loam ◽

Growing Season ◽

Biogeochemical Model ◽

Clay Loam ◽

Water Balance Components ◽

Linear Relationships ◽

Time Periods

The climatology of soil respiration in Hungary is presented. Soil respiration is estimated by a Thornthwaite-based biogeochemical model using soil hydrophysical data and climatological fields of precipitation and air temperature. Soil respiration fields are analyzed for different soil textures (sand, sandy loam, loam, clay loam and clay) and time periods (year, growing season and months). Strong linear relationships were found between soil respiration and the actual evapotranspiration for annual and growing season time periods. In winter months soil respiration is well correlated with air temperature, while in summer months there is a quite variable relationship with water balance components. The strength of linear relationship between soil respiration and climatic variables is much better for coarser than for finer soil texture.

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Interpretation of the Alluvial Floodplain Accumulation: On the Example of Cross-sections of Geoarchaeological Site Ostrov Listvenichnyi (Northeast Angara Region)

Bulletin of the Irkutsk State University Geoarchaeology Ethnology and Anthropology Series ◽

10.26516/2227-2380.2021.37.3 ◽

2021 ◽

Vol 37 ◽

pp. 3-32

Author(s):

G. A. Vorobieva ◽

◽

A. M. Kuznetsov ◽

E. O. Rogovskoi ◽

◽

...

Keyword(s):

Cross Sections ◽

Sandy Loam ◽

Modern Time ◽

Clay Loam ◽

Formation History ◽

Alluvial Floodplain ◽

Layer 4 ◽

Characteristic Features ◽

High Flood ◽

Humus Horizons

This paper examines characteristic features of floodplain accumulation at geoarchaeological site Ostrov Listvenichnyi, located on the Angara River at the same-name island (Northeast Angara region, Baikal Siberia). The problems of interpretation of topographic and lithological data, island architecture, glacial and postglacial natural climatic insights (MIS 2–MIS 1) are also touched upon. The accumulation of sediments at a series of 16 archaeological test pits recorded along the northwestern side of the island was analyzed by using pedolithological method. Island formation history included the upbuilding of the origin island based on river point bar, further transformation into “east” pre-island and final articulation of ancient “east” pre-island and younger “west” pre-island. The primary differences in alluvium composition of ancient pre-island (red beds, clay loam) and Holocene sedimentations (grey beds, sandy loam), both situated at the same level, were identified and explained. Detailed analysis of floodplain accumulation revealed eight distinct lithological layers varying by the structure and the composition. The following conclusions were reached based on the data available: lithological strata 1–5 have formed in Sartan, lithological strata 6–8 have formed in Holocene. Every layer contains the information on the changing climate and environment: signals of floods (high flood stages in 7 layer, “dry” stages in 3 layer), different phases of humification (humusless strata 1–4, first fragile humus horizons in layer 5, more pronounced humus horizons a, b, c, d in layer 4, and humus background in strata 7–8), epigenetic markers of сryogenic processes in strata 3–5. Analysis suggest also three chronologically differentiated floodplain benches: lower 1,5–2 meter bench (top of layer 3) associated with Middle Sartan; middle 2,5–3 meter bench (top of layer 5) associated with Final Sartan; top 4,5–5 meter bench (top of layer 8) associated with modern time.

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