trace metals in soil plant systems under tropical environment

... remains suitable for systems which are designed and operated under relative stable or unchanging environments However, it is insufficient in dealing with a large number of modern engineering systems ... type of options in systems, in- depth knowledge in technical and non-technical domain is required 2.5 General Frameworks for Embedding Flexibility in Engineering Systems by Utilizing Real Options ... partitioning and tearing, not capture the system interactions with the environments 31 Domain Mapping Matrix Extending from DSM methodology, a domain-mapping matrix (DMM) is an inter-domain matrix...

Ngày tải lên: 01/10/2015, 17:27

... obtained for DOM in the original river water sample seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in the samples after and weeks fitted to a single ... of zinc binding sites in river water DOM Fig represents the variation of DOC, UV254 and SUVA during the river water incubation for weeks in the preliminary study During the first days of incubation, ... slopes of the lines in a particular binding site class Conditional stability constant for the strong type of binding site remained at log K1' = 7.2 while that in weak type remained at log K2'...

Ngày tải lên: 05/09/2013, 10:15

... concentration in soil and Cu content in plant shows a significant positive effect (Fig 1) Table The contents of Cu2+ in soil, Cu content in plant and plant height (fresh weight) Cu2+ in soil Plant height ... stabilisation of weight The monitoring indicators for plants growth include plant height and biomass Total Cu in soil and plant tissues, Cu2+ (HNO3 0.43N) in soil was determined by Atomic Absorption Spectroscopy ... L.) with increasing concentration of Cu in soil The accumulation of heavy metal in plant tissues of Brassica juncea L is reflected the concentration in soil The contents of Cu in plant increase...

Ngày tải lên: 14/03/2014, 15:20

... concentrations in wheat under zero tillage, as compared with minimum or conventional tillage but Cd concentration in soils ŽEDTA extraction did not show apparent differences under zerominimum or conventional ... located in Pergamino Ž33Њ56Ј S; 60Њ34Ј W The soil is a Pergamino Series, fine illitic thermic Typic Argiudoll ŽTable In 1979 three soil treatments started: Ži a pasture of Festuca arundinacea, ... concentrations lower in all depths This can be attributed to the enrichment in trace elements in cropped soils from phosphate fertilizers The values of Fe, Mn and Zn were higher in the pasture soil and another...

Ngày tải lên: 15/03/2014, 23:22

... FAO/WHO joint codex commission *** Concern and countermeasure levels of heavy metals for soil contamination in the agricultural soils designated by Soil Environment Conservation Law’ in Korea (Minister ... Office (Efroymsom, 1997) In Cd, chlorosis on the edge of chinese cabbage leaves was shown at the 100 mg kg-1 Cd concentration in soil during early growing season (Figure 2) As chinese cabbage was grown, ... part of Chinese cabbage, radish, and lettuce grown at the different As treated soils Figure Growth damage of Chinese cabbage at the 100 mg kg-1 Cd concentration in soil during early growing season...

Ngày tải lên: 16/03/2014, 00:07

... chlorinated phenolics (Fed Reg., Vol 61, p 36841) Dioxin from Pulp and Paper and Lead in Soil at Mining Sites 23 The Process within EPA Setting the Agenda According to an environmentalist, the inadvertent ... to engage in the debate Many old mining sites are relatively small and isolated, but the contamination at some mining and processing sites (including areas in the “fallout zone” downwind of smelters) ... residences in the small, remote mining 49 Jasper County is an historic lead and zinc mining, milling, smelting area located in southwest Missouri It is located in EPA Region 7, headquartered in Kansas...

Ngày tải lên: 24/03/2014, 05:20

... being incorporated into biologically active soil organic matter The 15 percent increase in water stable aggregation (Table 1) also suggests the slight increase in soil organic matter was beginning ... organic decomposition and systems, including supplyrecycling of plant ing the necessary elements for plant growth The first and animal residues, step in formation of soil has many organic matter ... important roles by plants Capturing the in organic systems, energy of sunlight and efficiently recycling it including supplying through various forms of the necessary elements different soil organic...

Ngày tải lên: 20/04/2014, 17:43

... Sousa, “Collaborative spectrum sensing for opportunistic access in fading environments,” in Proceedings of the 1st IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks ... to maximize spectrum holes utilization under the constraint of collision tolerable level by selecting one time interval for transmitting in the idle period Under the assumption of stationarity ... duration in the idle period under the constraint of collision tolerable level, denoted by xopt and T a , respectively In this subsection, we discuss how to obtain xopt and T a in the following two...

Ngày tải lên: 21/06/2014, 19:20

... higher root production in the topsoil in INTA than in CONVB was not confirmed in 1990 as a higher winter wheat root density in the topsoil of CONVB than in that of INTA in the thin sections (Table ... methylene-blue staining (second bar at each depth) in INTA and CONVB in 1990 CONVB = conventional farming system since 1985 on low-organic matter soil; INTA = integrated farming system since 1985 on ... sampling also being significant (Marinissen, 1994) Whereas in spring 1988, aggregate stability in the size class 4.8 to mm in INTA and CONVA was similar, it remained high in INTA, but decreased in...

Ngày tải lên: 11/08/2014, 15:20

... field-moist clay soil than in the field-moist sandy soil (Figure 10) Drying of the aggregates increased 14CO evolution in the sandy soil, but not in the clay soil, and grinding did not increase 14CO2 ... population The inoculated bacteria can find more protective niches in fine-textured soils than in coarse-textured soils, leading to a higher grazing pressure in the coarse-textured soils (Postma, ... consistent with our findings: physical protection in small pores and in aggregates is an important mechanism in fine-textured soils, but not in coarse-textured soils In coarse-textured soils organic...

Ngày tải lên: 11/08/2014, 15:20

... relatively small dataset collected under a cool season (winter/spring) winter rye crop The original findings grossly underestimated the biomass of fungi due, in part, to the incomplete extraction of fungal ... Variation Understanding how soil biota respond to seasonal and, hence, climatological variation in the soil environment can also help in designing sustainable crop production practices In many ... (69 yr) cultivated soils Furthermore, the rapid decline in aggregate stability often noted in bare fallow soils or in soils where organic matter inputs are removed by burning may be attributed...

Ngày tải lên: 11/08/2014, 15:20

... for extrapolating to other soil and climate (rainfall) conditions Major uncertainties remain in the biological interactions in the rhizosphere The efficiency of a root system in taking up nutrients ... of mineral N in the topsoil, is not a real problem under these conditions, as the main leaching risk occurs after the growing season The main problem for effective use of organic N pools in the ... starting in May, with root residues collected in early spring remaining roots increased while dry weight decreased A slight net immobilization of minerals of N and P during autumn appeared in CONV...

Ngày tải lên: 11/08/2014, 15:20

... mycorrhizal-dependent species Inoculated plants have produced increments up to 1500% in dry weight with respect to uninoculated plants Similar increments in almost any evaluated parameter, including plant height, ... produced in multiple-crop systems in many parts of the world, including 90% of beans in Colombia, 80% of beans in Brazil, and 60% of maize in all the Latin American tropics Whatever the crop combinations, ... mycorrhiza in agro-ecosystems I Influence of nitrogen fertilization and green manure in continuous monoculture and in crop rotation on the inoculum potential of winter wheat Plant Soil, 107:279–284...

Ngày tải lên: 11/08/2014, 15:20

... maize in live mulch systems, in Nitrogen Management in Farming Systems in the Humid and Subhumid Tropics, Kang, B T and Van Der Heide, J., Eds., Joint publication: International Institute of Tropical ... enrichment in earthworm casts and in surrounding soil of a pineapple plantation Biol Fertil Soils, 8:178–182 Van der Meersch, M K., 1992 Soil Fertility Aspects of Alley Cropping Systems in Relation ... alley cropping systems under the hedgerows Table Annual Casting Activity in Alley Cropping Under the Hedgerow (Row) and in the Interrow Space (Middle) as Compared with Casting in a No-Tree Control...

Ngày tải lên: 11/08/2014, 15:20

... the environmental conditions under which the processing takes place (including climate and soil type), and the status of the soil community (Figure 2a and b) Increasing insight into the ways in ... that many of the great gains in production made in the green revolution by use of high-yielding varieties with high inputs of inorganic fertilizer cannot be maintained indefinitely Among the causes ... means of increasing the absolute amount of available P in an ecosystem P in the form of inorganic fertilizer is thus essential for increased productivity in a large range of tropical farming systems...

Ngày tải lên: 11/08/2014, 15:20

... respectively The main determining factor was soil organic matter Desorption for CIPC and 3CA from soils increased with reducing both carbon and LOI percentage In addition, investigations were ... at 20°C in both River Kelvin water and Glazert Water water was less than 2% in all the treatments Increasing the river water incubation temperature to 30°C resulted in a slight increase in the ... sprout inhibitor used in the potato industry (UK Potato Council 2013c) As a consequence there is environmental concern about CIPC reaching the aquatic environment from potato washing plants An...

Ngày tải lên: 22/12/2014, 21:19

... supervisory 2.4 Financial difficulties Up to April 2003, 61 hospitals in Vietnam (7%) had incinerators Most incinerators were very expensive They operated erratically and inefficiently Incinerators ... Korean incinerators but they rarely used them as they did not have treatment system Some Vietnamese factories tried manufacturing incinerators but either they could not apply in reality or incinerators ... wastes by allocating more and more supervisors for the processes of containment, collecting, transporting and treating in wastes centres Firstly, in the process of waste classification in hospitals,...

Ngày tải lên: 23/09/2012, 15:38

... to be confined to the intermediate aquifer (30-45 m depth) 4.0 million Tubewells in Bangladesh Supplying Drinking water to the people and among them 1.12 million Tubewells are contaminated with ... Arsenic contamination of Drinking water in Bangladesh WHO assignment report December 6-20, 1996 Jones, B and Manning, D A C (1994) Comparison of geochemical indices used for the interpretation ... Preliminary Results of Groundwater investigation in Arsenic affected areas in Bangladesh A Report Prepared by RGAG Japan RGAG(1999) Arsenic contamination of ground water in Bangladesh Interim...

Ngày tải lên: 05/09/2013, 08:40

... washing, was obtained in R5 while in other cases it was less than day This result suggested that adding polysilicate and Fe(III) mixture would bring better effect to mitigate membrane fouling ... worked more effectively on protein and carbohydrate removal The removal amount increased according to the 206 increase in Fe(III) concentrations Particularly, the protein concentrations decreased ... can be seen that the fouling frequency found in the three MBR systems were almost similar during the 35 days of operation Moreover, the mean periods per one washing in R1, R2, and R3 were 1.0...

Ngày tải lên: 05/09/2013, 10:15