Empirical Relationships of Phytomacrofaunal Abundance to Plant Biomass and Macrophyte Bed Characteristics

The abundance of phytophilous invertebrates was measured in 13 macrophyte beds and was related, using multiple regression analysis, to the biomass of macrophytes among which the invertebrates were collected, the average plant biomass growing per unit lake area, water and organic matter content of the sediments, total phosphorus concentration in the water, rooting depth of the macrophyte bed, and sampling date. Quantitative analyses are presented for chironomids, cladocerans, cyclopoid copepods, gastropods, water mites (Hydracarina), ostracods, and trichopterans. R2 values for the regression equations ranged from 0.43 to 0.81. The abundance of invertebrates was best related to the biomass of separate plant species, but equations based only on total plant biomass sometimes had equivalent R2 values, in general, the abundance of phytophilous invertebrates was positively related to areal plant biomass, sediment organic matter, and lake trophic status and negatively related to depth. The abundance of phytophilous invertebrates generally rose throughout the sampling season. The sign of the relationship with sediment water content, however, varied among invertebrate taxa. Macrophyte beds with high areal plant biomass, in lakes with high total phosphorus concentration, support the greatest abundance of potential invertebrate food for fish and waterfowl.

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Total phosphorus and organic matter content in bottom sediments of lake under restoration measures with iron treatment

Limnological Review ◽

10.2478/v10194-011-0016-2 ◽

2010 ◽

Vol 10 (3-4) ◽

pp. 139-145 ◽

Cited By ~ 4

Author(s):

Katarzyna Kowalczewska-Madura ◽

Renata Dondajewska ◽

Ryszard Gołdyn

Keyword(s):

Organic Matter ◽

Lake Sediments ◽

Total Phosphorus ◽

Bottom Sediments ◽

Organic Matter Content ◽

Dry Weight ◽

Matter Content ◽

Iron Treatment ◽

Iron Sulphate ◽

Restoration Measures

Total phosphorus and organic matter content in bottom sediments of lake under restoration measures with iron treatmentRusałka Lake is a shallow, man-made, strongly eutrophicated reservoir, being a place of recreational activities for Poznan citizens. Restoration measures with the use of iron sulphate were conducted in years 2006-2007. Phosphorus and organic matter concentrations in lake sediments were analyzed in years 2005-2007 at two research stations (profundal and littoral) to determine its changes under the influence of restoration. Greater phosphorus concentrations were noted in profundal (max 1.55 mg P g-1dry weight (DW)) than in littoral (max 0.98 mg P g-1DW). An increase of P amount in sediment was observed after iron treatment. Among phosphorus fractions Res-P dominated, i.e. phosphorus biologically unavailable for organisms. Organic matter content reached 23.1% in profundal, while 14.8% in littoral. Its amount decreased in following years.

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Efficacy of Selected Herbicides as Influenced by Soil Properties

Weed Technology ◽

10.1017/s0890037x00025392 ◽

1990 ◽

Vol 4 (2) ◽

pp. 279-283 ◽

Cited By ~ 35

Author(s):

Michael R. Blumhorst ◽

Jerome B. Weber ◽

Len R. Swain

Keyword(s):

Organic Matter ◽

Field Experiments ◽

Sandy Loam ◽

Organic Matter Content ◽

Organic Content ◽

Matter Content ◽

Herbicidal Activity ◽

Soil Parameters ◽

Regression Equations ◽

Humic Matter

Field experiments were conducted on six loam and sandy loam soils to study the influence of various soil parameters on atrazine, cyanazine, alachlor, metolachlor, and pendimethalin efficacy. Herbicidal activity was highly correlated to the soil organic content. Humic matter content was equally or better correlated (r = 0.70 to 0.91) with herbicide bioactivity than was organic matter content (r = 0.66 to 0.84). Regression equations were determined which allow herbicide rate recommendations for 80% weed control to be calculated based on soil humic matter or organic matter levels.

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Relationship between petrographic parameters and physical-mechanical properties of weakly cemented sandstones

Quarterly Journal of Engineering Geology and Hydrogeology ◽

10.1144/qjegh2018-168 ◽

2020 ◽

Vol 54 (1) ◽

pp. qjegh2018-168

Author(s):

Zhenkang Wang ◽

Jiangfeng Chen ◽

Wenping Li ◽

Qiqing Wang ◽

Qinghe Niu ◽

...

Keyword(s):

Organic Matter ◽

Multiple Regression ◽

Organic Matter Content ◽

Textural Properties ◽

Matter Content ◽

P Wave ◽

Stepwise Multiple Regression ◽

Regression Equations ◽

Overburden Pressure ◽

Thin Sections

Petrographic characteristics (textural properties and modal compositions) have an intrinsic influence on the physical and mechanical (PM) properties of weakly cemented sandstones. Sixteen sandstone samples were tested to determine the PM parameters and then thin sections from those samples were used to measure the petrographic parameters. Petrographic parameters were analysed statistically to establish quantitative relationships between the petrographic characteristics and PM properties. Based on multiple linear regression (MLRA) and stepwise multiple regression analyses (SMRA), several multiple regression equations with significant petrographic variables were established for estimating the PM parameters of the sandstone. Results indicated that uniaxial compressive strength (UCS) and Young's modulus (E) were closely related to mean grain size (Mz) (φ-value), non-uniform coefficient (Cu), fractal dimension (Fd), Riley sphericity (Ψp), packing proximity (Pp), floating contacts (Fl), grain-to-grain contacts (G-G), feldspar content and organic matter content. An increased percentage of grain-to-cement contacts (G-C) and reduced percentages of grain-to-matrix contacts (G-M) and organic matter content indicated a high value of Poisson's ratio (POISS). In addition, Mz, Cu, Fd, Ψp, quartz, feldspar, and organic matter contents were found to be significant parameters for density and P-wave velocity (Vp). Furthermore, density and POISS could be predicted using the results from the MLRA and Fd was a good predictor for density, Vp and UCS using the results from the SMRA. Additionally, it was noted that the petrographic characteristics of roof sandstones had significant influence on the overburden pressure characteristics within the coal faces in the Shendong mining area.

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Making Herbicide Rate Recommendations Based on Soil Tests

Weed Technology ◽

10.1017/s0890037x00029092 ◽

1987 ◽

Vol 1 (1) ◽

pp. 41-45 ◽

Cited By ~ 15

Author(s):

Jerome B. Weber ◽

M. Ray Tucker ◽

Robert A. Isaac

Keyword(s):

Organic Matter ◽

Acetic Acid ◽

Soil Organic Matter ◽

Field Experiments ◽

Chromic Acid ◽

Organic Matter Content ◽

Matter Content ◽

Regression Equations ◽

Humic Matter ◽

Soil Organic Matter Content

Percent soil organic matter content, as determined by standard chromic acid oxidations, was highly (r = 0.89) correlated with soil humic matter content, as determined by NaOH/DTPA (diethylenetriaminepenta-acetic acid)/alcohol extraction of 201 U.S. soils. Humic matter content of the soils was equally or better correlated (r = 0.89 to 0.97) with herbicide bioactivity, as measured in field experiments, than was percent organic matter content (r = 0.87 to 0.92). Regression equations provided allow herbicide rate recommendations for 80% weed control to be calculated based on soil humic matter or soil organic matter levels.

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Utilization of Waste from Para Rubber Industry to Produce Compost

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.931-932.762 ◽

2014 ◽

Vol 931-932 ◽

pp. 762-767

Author(s):

Wassana Taenkaew ◽

Suhainee Samo ◽

Prukraya Pongyeela ◽

Juntima Chungsiriporn ◽

Jutarut Pornpunyapat

Keyword(s):

Organic Matter ◽

Organic Carbon ◽

Total Organic Carbon ◽

Electric Conductivity ◽

Total Nitrogen ◽

Total Phosphorus ◽

Organic Matter Content ◽

Matter Content ◽

Mixing Condition ◽

Mixing Ratios

A survey of cooperative concentrated rubber latex industry in southern Thailand showed that most of them do not have adequate treatments for their wastes. Especially, skim latex serum (SS) with high source of ammonia is a main wastewater generated from their industries and concentrated latex sludge (CS) with high source of phosphorus is a main solid waste obtained from their industries. It was noted that both of the wastes cause environment problems. Water pollution and bad smell of NH3from these waste systems have also been generated and affected to human health. One low investment possibility is the elaboration of these wastes by composting because these wastes contain some nutrients (N, P, K) in available forms resulting in high potential to add value for fertilizer production. However, both of the wastes have a small amount of organic matter content that need to be mixed with other materials with high organic matter such as sawdust (SD). Thus, the aim of this research was to investigate the utilization of these wastes to produce compost. In this work, the SS, CS and SD were composted in specially designed composting vessel (6L) with various mixing ratios of the SS, CS and SD in order to examine the optimized mixing condition and physical properties of the compost. Each treatment was composted with 60 days of composting duration. The performance of composting process was analyzed in term of the following: temperature, pH, electric conductivity, total organic carbon, total nitrogen, total phosphorus and C/N ratio. The analysis of temperature, pH, and electric conductivity was measured every day while the analysis of total organic carbon, total nitrogen, total phosphorus and C/N ratio was investigated every 10 days. According to the results, the optimized mixing ratio of SS, CS and SD for composting was 1:1:1. The final resultant compost was feasible for agricultural use. From the view point of compost qualities, it was in the range of the Thai compost standard with 7.91 of pH, 15.06 (%w/w) of total organic carbon, 1.24 (%w/w) of total nitrogen, 0.69 (%w/w) of total phosphorus and 21.6 of C/N ratio.

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HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2018-3-46-54 ◽

2018 ◽

pp. 46-54

Author(s):

O. A. Lipatnikova

Keyword(s):

Heavy Metal ◽

Organic Matter ◽

Bottom Sediments ◽

Metal Speciation ◽

Organic Matter Content ◽

Water Reservoir ◽

Matter Content ◽

Heavy Metal Speciation ◽

Mobile Forms ◽

Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

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Changes in organic matter content of soil as a result of long-term fertilization

Cereal Research Communications ◽

10.1556/crc.33.2005.1.12 ◽

2005 ◽

Vol 33 (1) ◽

pp. 53-55

Author(s):

Katalin Berecz ◽

Katalin Debreczeni

Keyword(s):

Organic Matter ◽

Organic Matter Content ◽

Matter Content

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Physico-Chemical Properties of Soil Collected from Chandrabhaga River in Kalmeshwar, Nagpur, Maharashtra

Journal of Advanced Research in Alternative Energy Environment and Ecology ◽

10.24321/2455.3093.202006 ◽

2020 ◽

Vol 07 (02) ◽

pp. 1-3

Author(s):

Amita M Watkar ◽

Keyword(s):

Organic Matter ◽

Soil Quality ◽

Agricultural Land ◽

Organic Matter Content ◽

Chemical Properties ◽

Matter Content ◽

Soil Attributes ◽

Essential Components ◽

Agricultural Land Management ◽

Physical And Chemical

Soil, itself means Soul of Infinite Life. Soil is the naturally occurring unconsolidated or loose covering on the earth’s surface. Physical properties depend upon the amount, size, shape, arrangement, and mineral composition of soil particles. It also depends on the organic matter content and pore spaces. Chemical properties depend on the Inorganic and organic matter present in the soil. Soils are the essential components of the environment and foundation resources for nearly all types of land use, besides being the most important component of sustainable agriculture. Therefore, assessment of soil quality and its direction of change with time is an ideal and primary indicator of sustainable agricultural land management. Soil quality indicators refer to measurable soil attributes that influence the capacity of a soil to function, within the limits imposed by the ecosystem, to preserve biological productivity and environmental quality and promote plant, animal and human health. The present study is to assess these soil attributes such as physical and chemical properties season-wise.

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Lake Paranoá, Brasília, Brazil: Integrated Management Plan for its Restoration

Water Quality Research Journal ◽

10.2166/wqrj.1992.019 ◽

1992 ◽

Vol 27 (2) ◽

pp. 271-286 ◽

Cited By ~ 4

Author(s):

Sonia Paulino Mattos ◽

Irene Guimarães Altafin ◽

Hélio José de Freitas ◽

Cristine Gobbato Brandão Cavalcanti ◽

Vera Regina Estuqui Alves

Keyword(s):

Total Phosphorus ◽

Drainage Basin ◽

Integrated Management ◽

Algal Growth ◽

Nutrient Content ◽

Management Plan ◽

Cylindrospermopsis Raciborskii ◽

Phosphorus Concentration ◽

Limiting Factor ◽

Total Phosphorus Concentration

Abstract Built in 1959, Lake Paranoá, in Brasilia, Brazil, has been undergoing an accelerated process of nutrient enrichment, due to inputs of inadequately treated raw sewage, generated by a population of 600,000 inhabitants. Consequently, it shows high nutrient content (40 µg/L of total phosphorus and 1800 µg/L of total nitrogen), low transparency (0.65 m) and high levels of chlorophyll a (65 µg/L), represented mainly by Cylindrospermopsis raciborskii and sporadic bloom of Microcystis aeruginosa, which is being combatted with copper sulphate. With the absence of seasonality and a vertical distribution which is not very evident, the horizontal pattern assumes great importance in this reservoir, in which five compartments stand out. Based on this segmentation and on the identification of the total phosphorus parameter as the limiting factor for algal growth, mathematical models were developed which demonstrate the need for advanced treatment of all the sewage produced in its drainage basin. With this, it is expected that a process of restoration will be initiated, with a decline in total phosphorus concentration to readings below 25 µg/L. Additional measures are proposed to accelerate this process.

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