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Search Results: 1 - 10 of 130443 matches for " V. Trelo-ges "
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An Improvement of Yasothon Soil Fertility (Oxic Paleustults) Using Municipal Fermented Organic Compost and Panicum maximum TD 58 Grass
T. Chuasavathi,V. Trelo-ges
Pakistan Journal of Biological Sciences , 2001,
Abstract: An investigation on the improvement of Yasothon soil (Oxic Paleustults) fertility by Khon Kaen`s municipal fermented waste was carried out at Khon Kaen University for the treatments with and without sowing Panicum maximum TD 58 grass. The results showed that Khon Kaen`s municipal waste had a tremendous effect in improving Yasothon soil fertility. Decomposition rate of organic compost in soil was most rapid due to high environmental temperature. The improvement of soil fertility was greater for treatments with the growth of Panicum maximum TD 58 grass than those without. An increase in the amount of organic compost added to the soil increased the percentages of soil nitrogen, soil available P and exchangeable K. Municipal organic compost increased soil pH, but a greater result was found for treatments with the growth of Panicum maximum TD 58 grass. Municipal waste contented the majority of plant materials and garbage and they should be sorted out daily and recycled as a fermented compost to improve soil fertility for better crop production and sustainable agriculture.
An Ecological Study on Earthworm (Pheretema sp.) in Different Environments of Nam Pong Soil Series (Ustoxic Quartzipsamment), Northeast Thailand
T. Chuasavathi,V. Trelo-ges,S. Ruaysoongnern
Pakistan Journal of Biological Sciences , 2000,
Abstract: A field survey was carried out on farmer land areas in Northeast Thailand where earthworms have been inhabited. Methodology being used was a grid method of 10x10 m plots in four different inhabitancies, i.e. native dipterocarp forest, tamarind orchard, natural grazing areas and sugarcane plantation. The results showed that earthworm inhabitants were largely found in soils with organic matter contents (OM %) ranging from 0.40-0.89% and soil pH values of the studied sites ranging from 4.68-6.29 whilst electrical conductivity (EC) values of soil locations were ranging from 52.9-94.0 μ Mho/cm. There were no clear trends on earthworm (Pheretema sp.) distribution have been recorded yet it seems more likely that organic matter, soil moisture contents, soil disturbances and seasonal changes had its effects on earthworm distribution. Variation in soil characteristics had no effect on earthworm distribution in Northeast Thailand and it was not considered as a limiting factor to proliferation of the earthworms.
Effect of Earthworm Activities (Pheretema sp.) on the Changes in Soil Chemical Properties at Different Soil Depths of Nampong Soil Series (Ustoxic Quartzipsamment) in Northeast Thailand
V. Trelo-ges,S. Ruaysoongnern,T. Chuasavathi
Pakistan Journal of Biological Sciences , 2002,
Abstract: This field research was carried out at Udon Thani Province, Northeast Thailand with the use of Nampong soil series (Ustoxic Quartzipsamment) during 1998 to investigate the effect of earthworm (Pheretema sp.) activities on the changes in chemical properties of Nampong soil series at different soil depths in different eco-systems. Soil samples were taken once at the soil depth of 0-10, 10-20, 20-30 cm from locations with and without earthworm activities of the four eco-systems for the determinations of EC, pH, OM, available P, exchangeable K, Ca, and Mg. The results showed that earthworm activities, in most cases, have improved soil chemical properties at different depths in all locations studied and it was found that soil electrical conductivity (EC), organic matter (OM), available phosphorous (P), exchangeable potassium (K), calcium (Ca) and magnesium (Mg) values of tamarind orchard farm were much greater than those of other studied sites both with and without earthworm activities.
Earthworm Casts (Pheretema sp.) Nutrient Contents of Nampong Soil Series (Ustoxic Quartzipsamment) in Northeast Thailand
T. Chuasavathi,V. Trelo-ges,S. Ruaysoongnern
Pakistan Journal of Biological Sciences , 2001,
Abstract: This earthworm cast experiment was carried out at four different sites of Nampong soil series (Ustoxic quartzipsamment) namely dipterocarp forest, tamarind orchard farm, grazing pasture, and sugarcane plantation. The results showed that earthworm casts of the four locations contented different levels of nutrients. The highest nutrient contents were found with Tamarind orchard farm followed by Dipterocarp forest, grazing pasture, and sugarcane plantation, respectively. Data on nutrient contents (NPK, Ca, Mg, and Na) of earthworm casts of each location were much higher than that of their respective soils. Earthworm casts could help to improve soil properties particularly Nampong soil series, which contented low level of soil fertility. This may help to improve crop yield for sustainable agriculture.
The Effect of Different Fertilizers Management Strategies on Growth and Yield of Upland Black Glutinous Rice and Soil Property
A. Naing Oo,P. Banterng,A. Polthanee,V. Trelo-Ges
Asian Journal of Plant Sciences , 2010,
Abstract: The aim of this study was to investigate the effect of organic and inorganic fertilizers on growth and yield of five upland black glutinous rice varieties and soil property. Two experiments were conducted at Khon Kaen University, Thailand during the rainy seasons of 2007 and 2008. Experiments were laid out in a split-plot design with four replications. Four fertilizer treatments (control, farmyard manure (FYM) or cattle manure at a rate of 10 t ha-1, NPK at the rate of 50-22-42 kg N-P-K ha-1, the combination of the FYM and NPK were randomized in the main plots and five black glutinous rice varieties (KKU-GL-BL-05-002, KKU-GL-BL-05-003, KKU-GL-BL-05-004, KKU-GL-BL-05-009 and KKU-GL-BL-05-010) were randomized in the sub plots. Soil samples before fertilizer application and after harvesting were analyzed to determine chemical and physical properties. Leaf Area Index (LAI) and shoot dry matter were recorded at 40 days after planting, panicle initiation and flowering stages. Number of tillers and panicles per hill and grains per panicle, thousand grain weight, number of filled and unfilled grains and grain yield were recorded at harvest time. The results from both years indicated that using the combination of FYM and inorganic fertilizers increased shoot dry matter, LAI, tiller and panicle number per hill, grain number per panicle and grain yield. It was recorded that application of FYM together with inorganic fertilizers significantly increased soil organic matter, CEC, N, P and K. Comparing among the five varieties, KKU-GL-BL-05-002 had highest grain number per panicle and grain yield in both years.
Minimum tillage for cassava production in Khon Kaen Province, Thailand
Somphob Jongruaysup,Vidhaya Trelo-ges,Chindarat Chuenrung
Songklanakarin Journal of Science and Technology , 2003,
Abstract: This research paper study on the comparison between no-tillage (NT) and conventional tillage (CT) incorporated with 3 levels of nitrogen fertilizer application rate (0, 50 and 100 kg N/ha) on the fresh root yield of cassava (var. Rayong 72). The field trial has been established since 2000 on the Satuk soil series (fine loamy, silicious, Oxic Paleustults) Khon Kaen, Thailand. Under no-tillage practices, the physical soil properties were improved compared to the conventional tillage system and the original soil properties at the start of the trial. The soil structure parameters such as total porosity, soil saturated hydraulic conductivity (Ksat) increased in NT plot, whilst soil bulk density (ρb) decreased compared to CT plot. Results indicated that the higher yield of fresh root of cassava was observed in the NT plot (P<0.05) of the first year of the experiment. By contrast, the higher yield of the fresh root of cassava was observed in the conventional tillage of the second year but the different yields were not statistically significantly different (P>0.05). For the nitrogen application, the yield increased as nitrogen supply increased but the increment was not significant statistically (P>0.05).
The Nucleosome-Remodeling ATPase ISWI Is Regulated by Poly-ADP-Ribosylation
Anna Sala,Gaspare La Rocca,Giosalba Burgio,Elena Kotova,Dario Di Gesù,Marianna Collesano,Antonia M. R. Ingrassia,Alexei V. Tulin,Davide F. V. Corona
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.0060252
Abstract: ATP-dependent nucleosome-remodeling enzymes and covalent modifiers of chromatin set the functional state of chromatin. However, how these enzymatic activities are coordinated in the nucleus is largely unknown. We found that the evolutionary conserved nucleosome-remodeling ATPase ISWI and the poly-ADP-ribose polymerase PARP genetically interact. We present evidence showing that ISWI is target of poly-ADP-ribosylation. Poly-ADP-ribosylation counteracts ISWI function in vitro and in vivo. Our work suggests that ISWI is a physiological target of PARP and that poly-ADP-ribosylation can be a new, important post-translational modification regulating the activity of ATP-dependent nucleosome remodelers.
The Nucleosome-Remodeling ATPase ISWI Is Regulated by Poly-ADP-Ribosylation
Anna Sala,Gaspare La Rocca,Giosalba Burgio,Elena Kotova,Dario Di Gesù,Marianna Collesano,Antonia M. R Ingrassia,Alexei V Tulin,Davide F. V Corona
PLOS Biology , 2008, DOI: 10.1371/journal.pbio.0060252
Abstract: ATP-dependent nucleosome-remodeling enzymes and covalent modifiers of chromatin set the functional state of chromatin. However, how these enzymatic activities are coordinated in the nucleus is largely unknown. We found that the evolutionary conserved nucleosome-remodeling ATPase ISWI and the poly-ADP-ribose polymerase PARP genetically interact. We present evidence showing that ISWI is target of poly-ADP-ribosylation. Poly-ADP-ribosylation counteracts ISWI function in vitro and in vivo. Our work suggests that ISWI is a physiological target of PARP and that poly-ADP-ribosylation can be a new, important post-translational modification regulating the activity of ATP-dependent nucleosome remodelers.
Small noise asymptotic of the Gallavotti-Cohen functional for diffusion processes
Lorenzo Bertini,Giacomo Di Gesù
Mathematics , 2010,
Abstract: We consider, for a diffusion process in R^n, the Gallavotti-Cohen functional, defined as the empirical power dissipated in a time interval by the non-conservative part of the drift. We prove a large deviation principle in the limit in which the noise vanishes and the time interval diverges. The corresponding rate functional, which satisfies the fluctuation theorem, is expressed in terms of a variational problem on the classical Freidlin-Wentzell functional.
Approximation of single layer distributions by Dirac masses in Finite Element computations
Benoit Fabrèges,Bertrand Maury
Mathematics , 2012,
Abstract: We are interested in the finite element solution of elliptic problems with a right-hand side of the single layer distribution type. Such problems arise when one aims at accounting for a physical hypersurface (or line, for bi-dimensional problem), but also in the context of fictitious domain methods, when one aims at accounting for the presence of an inclusion in a domain (in that case the support of the distribution is the boundary of the inclusion). The most popular way to handle numerically the single layer distribution in the finite element context is to spread it out by a regularization technique. An alternative approach consists in approximating the single layer distribution by a combination of Dirac masses. As the Dirac mass in the right hand side does not make sense at the continuous level, this approach raises particular issues. The object of the present paper is to give a theoretical background to this approach. We present a rigorous numerical analysis of this approximation, and we present two examples of application of the main result of this paper. The first one is a Poisson problem with a single layer distribution as a right-hand side and the second one is another Poisson problem where the single layer distribution is the Lagrange multiplier used to enforce a Dirichlet boundary condition on the boundary of an inclusion in the domain. Theoretical analysis is supplemented by numerical experiments in the last section.
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