Mulching effect of plant residues of chemically contrasting compositions on soil organic matter content and cation exchange capacity

The adsorption of 2-(ethylamino)-4-(isopropylamino)-6-(methylthio)-s-triazine (ametryne) and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) varied greatly among 34 Puerto Rican soils was studied using the agitated slurry technique. Adsorption was expressed as a distribution coefficient (Kd), which is the ratio of the amount of herbicide adsorbed to the amount in the equilibrium solution. In general, diuron was adsorbed to a greater degree than ametryne. Adsorption of ametryne was positively correlated with organic matter and silt content but negatively correlated with pH of the soil. The inclusion of soil pH in a multiple regression analysis contributed the highest increase in explanation for adsorption of ametryne. Adsorption of diuron was highly correlated with organic matter content and cation exchange capacity. A correlation was found between adsorption of diuron and content of magnesium, and soil texture. Cation exchange capacity was the only inclusion soil property which, in addition to organic matter, significantly contributed to the adsorption of diuron. Temperature appeared to have a greater effect on the adsorption of diuron than on the adsorption of ametryne. Conversely, the effect of pH on the adsorption of ametryne was significantly greater than that of diuron.

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Effect of Topography and Soil Depth on Clay Content, Organic Matter Content, Active Acidity, Reserve Acidity and Cation Exchange Capacity of Some Tea Soils of Bangladesh

Journal of Scientific Research ◽

10.3329/jsr.v8i2.26867 ◽

2016 ◽

Vol 8 (2) ◽

pp. 229-235

Author(s):

A. F. M. Sanaullah ◽

M. Akhtaruzzaman ◽

M. A. Uddin

Keyword(s):

Organic Matter ◽

Cation Exchange ◽

Cation Exchange Capacity ◽

Soil Depth ◽

Organic Matter Content ◽

Clay Content ◽

Exchange Capacity ◽

Matter Content ◽

Soil Samples ◽

Topographic Positions

Soil samples were collected from M. R. Khan tea-estate area of Moulvibazar district, Bangladesh. Organic matter, active acidity, reserve acidity, cation exchange capacity, clay content and textural class of the collected soil samples for different topographic positions and depths were determined. The percentage of sand, silt and clay varied from 59.75 to 70.50, 12.50 to 20.00 and 14.50 to 22.75, respectively. Active acidity and reserve acidity of the soils varied from 4.13 to 5.82 and 3.46 to 4.84, respectively. Organic matter content varied from 0.37% to 1.93%. Cation exchange capacity (CEC) varied from 11.42 to 24.86 cmolKg-1. Soils were acidic in nature with considerably high reserve acidity. The measured parameters of the soil samples were plotted and analyzed with reference to topography and depth. The parameters have been found to vary with sampling sites, depths and topography.

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A Single Field Measurement for Estimating Saturation Percentage, Cation Exchange Capacity, and Organic Matter Content of Soils

Communications in Soil Science and Plant Analysis ◽

10.1081/css-120017429 ◽

2003 ◽

Vol 34 (1-2) ◽

pp. 247-257

Author(s):

John Ashworth

Keyword(s):

Organic Matter ◽

Cation Exchange ◽

Field Measurement ◽

Cation Exchange Capacity ◽

Organic Matter Content ◽

Exchange Capacity ◽

Matter Content ◽

Single Field

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Adsorption of Fluometuron, Prometryne, Sencor, and 2,4-D by Soils

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v57i4.10726 ◽

1969 ◽

Vol 57 (4) ◽

pp. 286-293 ◽

Cited By ~ 2

Author(s):

L. C. Liu ◽

H. R. Cibes-Viadé

Keyword(s):

Organic Matter ◽

Cation Exchange ◽

Adsorption Capacity ◽

Cation Exchange Capacity ◽

Organic Matter Content ◽

Clay Content ◽

Exchange Capacity ◽

Matter Content ◽

The Mean ◽

Highly Correlated

The adsorption capacity of Fluometuron, Prometryne, Sencor, and 2,4-D by 48 local soils was determined spectrophotometrically. The mean adsorptivities of the four herbicides by these soils were as follows: Prometryne 37.0 percent, Sencor 23.0 percent, Fluometuron 22.6 percent, and 2,4-D 12.4 percent. The results indicated that organic matter content was the factor most highly correlated with adsorption of these herbicides by the 48 soils. Cation exchange capacity was found to correlate significantly with adsorption of Fluometuron, Prometryne, and Sencor. Such was not the case with 2,4-D. Correlation between clay content and adsorption of Fluometuron and Sencor was statistically significant. In contrast, no significant correlation was noted between clay content and adsorption of Prometryne and 2,4-D.

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AN ANALYSIS OF THE EFFECT OF CLAY AND ORGANIC MATTER CONTENT ON THE CATION EXCHANGE CAPACITY OF NEW JERSEY SOILS

Soil Science ◽

10.1097/00010694-198205000-00003 ◽

1982 ◽

Vol 133 (5) ◽

pp. 281-288 ◽

Cited By ~ 16

Author(s):

ELISSA H. DRAKE ◽

HARRY L. MOTTO

Keyword(s):

Organic Matter ◽

New Jersey ◽

Cation Exchange ◽

Cation Exchange Capacity ◽

Organic Matter Content ◽

Exchange Capacity ◽

Matter Content

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Preliminary Study on Deltamethrin Residues in Cabbage, Soil and Water from Dalaguete, Cebu, Philippines

KIMIKA ◽

10.26534/kimika.v27i1.1-11 ◽

2016 ◽

Vol 27 (1) ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Amstrong Calinawan ◽

Concepcion S. Mendoza ◽

Leonila Adarna

Keyword(s):

Organic Matter ◽

Detection Limit ◽

Cation Exchange ◽

Water Samples ◽

Cation Exchange Capacity ◽

Organic Matter Content ◽

Exchange Capacity ◽

Matter Content ◽

Significant Difference ◽

Soil And Water

Pesticides pose a threat to the environment and eventually human health. Extent of contamination of pesticides can be determined and monitored by analysis of pesticide residue in surface water, sediments, soil, and biota. Samples were collected from Manlapay, Barangay Mantalongon in Dalaguete, reportedly the vegetable basket of Cebu, from October to November 2013. Concentration of the pesticide deltamethrin was determined by Gas Chromatography-Electron Capture Detector along with organic matter content (OM), potassium (K) and cation exchange capacity (CEC) using standard methods of analysis. Data showed that deltamethrin was found to be present in soil and cabbage and beyond detection limit in water. Inverse relationship was found between residue in cabbage and in soil confirming pesticide leaching as supported by rainfall data. Organic matter and cation exchange capacity in soil showed significant correlation to detected deltamethrin residue confirming that pyrethroids are strongly bound to organic matter and free exchangeable potassium ions. Deltamethrin residue in water does not show any correlation to any other parameters as it is beyond detection limit, probably due to volatilization and photodegradation of deltamethrin in water. Temperature variation does not show significant difference to deltamethrin residue in all three matrices. The detected deltamethrin residue concentrations in the cabbage (<0.001-0.029 ppm), soil samples (0.007-0.008 ppm) and water samples (<0.0005 ppm) were all below international guideline limits (ASEAN maximum level of 0.5 ppm deltamethrin in cabbage, EC ecologically accepted concentration of 1290 mg deltamethrin/kg soil, and a maximum limit of 0.0025 ppm deltamethrin according to Canadian water quality, respectively). Inspite of the low concentrations detected in cabbage, soil and water samples, an extensive pesticide monitoring on environmental samples within the area is advisable. This will help the adoption of an efficient risk assessment strategy to inform appropriate interventions.

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Adsorption of Atrazine and Terbacil by Soils

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v55i4.11008 ◽

1969 ◽

Vol 55 (4) ◽

pp. 451-460

Author(s):

L. C. Liu ◽

H. Cibes-Viadé ◽

F. K. S. Koo

Keyword(s):

Organic Matter ◽

Cation Exchange ◽

Puerto Rican ◽

Cation Exchange Capacity ◽

Sandy Loam ◽

Organic Matter Content ◽

Exchange Capacity ◽

Matter Content ◽

Sand Content ◽

Calcium Magnesium

The differential in the adsorption capacity of 2-chloro-4-(ethylamino)-6- (isopropylamino)-s-triazine (Atrazine) and 3-tert.-butyl-5-chloro-6-methyl- uracil (Terbacil) by 34 Puerto Rican soils was studied in the laboratory using C14-labeled herbicides. The various soils differed greatly in their capacity to adsorb Atrazine and Terbacil. The Caño Tiburones soil was found to be the most adsorptive for both herbicides; the Toa sandy loam and Talante sandy loam the least for Atrazine and Terbacil, respectively. Atrazine was consistently adsorbed to a greater degree than Terbacil. Adsorption of Atrazine was correlated positively with organic matter content, cation exchange capacity and magnesium and silt content but negatively with sand content. Adsorption of Terbacil was positively correlated with organic matter, cation exchange capacity, soil pH, content of phosphorus, calcium, magnesium and clay but negatively with sand content of the soil. Representative adsorption isotherms of Atrazine and Terbacil on several important island soils devoted to sugarcane cultivation are also presented in this report.

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