Literatura científica selecionada sobre o tema "Irrigation farming (S.E.Australia)"
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Artigos de revistas sobre o assunto "Irrigation farming (S.E.Australia)"
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MARASENI, T. N., S. MUSHTAQ e J. MAROULIS. "Greenhouse gas emissions from rice farming inputs: a cross-country assessment". Journal of Agricultural Science 147, n.º 2 (20 de janeiro de 2009): 117–26. http://dx.doi.org/10.1017/s0021859608008411.
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SUMMARYRegardless of the irrigation system deployed, rice production requires a variety of farm energy inputs. The present study estimated and compared greenhouse gas (GHG) emissions from rice farming practices, resulting from various farm inputs and irrigation systems in Pakistan, the Philippines, China, Indonesia, Myanmar, Nepal, Australia and the USA. Results indicate that, on aggregate, emissions related to farm machinery, fuels, agrochemicals and animal labour accounted for 0·018, 0·307, 0·666 and 0·008, respectively. Emissions from tubewell irrigation systems were the highest, followed by canal and rainfed irrigation systems. Average emissions from all selected countries with tubewell irrigation systems were 1·64 times greater than canal irrigation systems and 2·64 times greater than rainfed irrigation systems. When considering GHG emission efficiencies (emissions/kg of rice yield), developing countries were found to be less efficient than developed countries in both canal and tubewell irrigation systems. The relationship between GHG emissions and rice yield was statistically significant (P<0·01), with results indicating that a yield increase of 100 kg would increase GHG emissions by 16·51 kg CO2e (kg carbon dioxide equivalent).
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Ribeiro, Eduardo Castro, Daniel Fonseca de Carvalho, Lucas Antonio de Freitas Santos e José Guilherme Marinho Guerra. "Onion yield under agroecological farming system using distinct irrigation depths and soil covers". Ciência Rural 46, n.º 5 (1 de março de 2016): 783–89. http://dx.doi.org/10.1590/0103-8478cr20150342.
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ABSTRACT: The present study was carried out in order to evaluate the effects of irrigation depths applied through drip and presence/absence of soil cover in onion yield, under agroecological farming. The experiment was conducted in Seropédica, RJ, Brazil, from May to September 2012. The experimental design was a randomized complete block with split-plot design with 10 treatments and 7 replications, characterized by the presence (+S) and absence (-S) of soil cover and five irrigation depths according to percentages of the crop evapotranspiration (ETc): 0, 22, 45, 75 and 100% (0, 155, 220.6, 320.5 and 372,7mm in +S condition and 0, 145.5, 207.6, 285, 351,4mm in -S condition). The irrigation influenced by second-order polynomial regression the total yield of bulbs, percentage distribution of bulbs in diameter classes and water use efficiency (WUE) in the -S condition, and in the linear regression the WUE in +S condition. The soil cover promoted an increase on the total bulb yield, WUE and the percentage of bulbs classified in classes of greater diameter.
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Bethune, M., O. A. Gyles e Q. J. Wang. "Options for management of saline groundwater in an irrigated farming system". Australian Journal of Experimental Agriculture 44, n.º 2 (2004): 181. http://dx.doi.org/10.1071/ea02179.
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Groundwater pumping is used to control salinity problems in many irrigation regions of Australia. Options for managing the pumped groundwater are required to be consistent with achieving high farm production levels and minimising salt export from irrigation regions. In this study, pasture production and economic aspects of 6 options for managing pumped groundwater are compared. The 6 options include (i) complete farm reuse of pumped groundwater for irrigation; (ii) complete export to river system; (iii) complete disposal to evaporation basin; (iv) partial farm reuse with reduced salt export; (v) partial farm reuse with reduced disposal to evaporation basin; and (vi) partial farm reuse with disposal to a salt tolerant forage crop. The comparison between the 6 options is made for a hypothetical 100 ha dairy farm that has a perennial pasture based production system. Complete farm reuse was the most economic option in areas where groundwater salinity is low (<5 dS/m). Partial farm reuse with disposal of surplus groundwater to a salt tolerant forage species was the most economical option for managing higher salinity groundwater.
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Mabe, Franklin Nantui, Cheye Stephen e Abdulai Ibrahim. "The Effect of Contract Farming on Rice Yield in the Botanga irriagation Scheme." International Journal of Irrigation and Agricultural Development (IJIRAD) 5, n.º 1 (19 de junho de 2022): 234–45. http://dx.doi.org/10.47762/2021.964x.49.
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Contract farming which involves an agreement between a farmer(s) and buyer under specific conditions is supposed to yield mutual benefits. It has gained ground in Ghana`s rice production sector including rice farmers in the Botanga Irrigation Scheme. Farmers are expected to get higher yields through the provision of necessary improved inputs and management advice by the contractors. Meanwhile, there is no empirical evidence on the effect of contract farming on yield. This study aimed to examine the effect of contract farming on rice yield in the Botanga irrigation scheme. A simple random sampling procedure was employed to select a total of 130 respondents. Heckman treatment effect model and Kendall’s coefficient (W) of Concordance were employed as analytical methods for achievement of the objectives. The study revealed that household size, farmer-based organization membership, labour, fertilizer, weedicides and pesticides positively affected rice yield. Extension services and seed however negatively affected rice yield. The achievement of optimum rice yield is constrained by inadequate extension services which renders the farmers deficient of the requisite knowledge and competencies for proper farming culminating into sub-optimal yields. Small farm size and strict specification of contractors were respectively the most pressing and least pressing constraints associated with farmers` decision to participate in contract farming in the study area. The study recommends that government should feasibly expand the land area under irrigation so that farmers can access more land for farming. Farmers should also be stimulated and supported to go into contract farming.
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Russell, JS, e AL Chapman. "Sulfur deficiency in rice grown on the alkaline soils of the Ord Irrigation Area, Western Australia". Australian Journal of Experimental Agriculture 28, n.º 1 (1988): 111. http://dx.doi.org/10.1071/ea9880111.
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Nutrient and acidification effects of sulfur (S) on the growth of flooded rice on Cununurra clay from the Ord Irrigation Area, Western Australia. were studied in pot experiments. An acute S deficiency in the surface horizon of Cununurra clay was found. This deficiency was extreme on virgin soil but was also evident on cropped soil that had received substantial amounts of S as superphosphate and ammonium sulfate in the past. The major effect of an application of elemental S on rice growth was as a nutrient. Irrigation water appears to be an important source of nutrient S in this remote area where annual atmospheric accessions of S are estimated to be about 1 kg ha-1. The S content of Ord irrigation water from Lake Argyle is relatively low (mean � s.e. sulfate3 = 1.7 � 0.05 mg L-1) by world standards. Nevertheless. in this study, 62% of the S added with the Ord irrigation water was recovered in the plant tops. This indicates that factors which determine the amount of irrigation water applied are likely to affect the field incidence of S deficiency. In particular, decreased usage of irrigation water during the December-March wet season (when average rainfall is 630 mm) may increase the likelihood of S deficiency in rice.
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Chapman, AL, JD Sturtz, AL Cogle, WS Mollah e RJ Bateman. "Farming systems in the Australian semi-arid tropics-a recent history". Australian Journal of Experimental Agriculture 36, n.º 8 (1996): 915. http://dx.doi.org/10.1071/ea9960915.
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The recent history of dryland farming in the Australian semi-arid tropics is discussed briefly against the background of national and state policies, established following World War II, aimed at increasing the population and development of northern Australia. Some reference is also made to irrigation as a means of overcoming limitations imposed by rainfall and to complement dryland farming systems. The environmental and socio-economic constraints whch have so far limited commercial agriculture in the Australian semi-arid tropics are highlighted. Efforts, particularly in north-west Australia, to develop sustainable farming systems based on legume pasture leys and livestock production in conjunction with annual cropping, as a basis for closer settlement, are reviewed. These attempts, which began in the 1960s and stemmed from earlier post-war agricultural research in the region, initially relied on a pasture legume (Stylosanthes humilis cv. Townsville stylo) and conventional tillage. Farming system development continues today using new legume species (e.g. Stylosanthes hamata cv. Verano and Centrosema pascuorum cv. Cavalcade) and no-tillage cropping technology. This paper documents the history of agricultural and research development, and commercial practice in the Australian semi-arid tropics.
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Maraseni, T. N., S. Mushtaq e K. Reardon-Smith. "Re-evaluating the rationale for irrigation technology adoption through an integrated trade-off analysis: case study of a cotton farming system in Australia". Journal of Water and Climate Change 5, n.º 3 (8 de março de 2014): 328–40. http://dx.doi.org/10.2166/wcc.2014.046.
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While the prevailing rationale for new irrigation technology adoption is improved water use efficiency, this study evaluated trade-offs between water savings, greenhouse gas (GHG) emissions and economic gain associated with the conversion of a furrow irrigation system to a sprinkler irrigation (lateral-move) system on a cotton farm in eastern Australia. Trade-offs were evident when conversion to the pressurised sprinkler irrigation system was evaluated in terms of fuel and energy-related emission; the adoption of the new system saved water but increased GHG emissions. However, when we considered changes in farm machinery and input uses as a result of the conversion, we found an overall reduction in GHG emissions. Overall, the GHG modelling indicated that higher total quantities of GHGs were emitted from the furrow irrigation (4,453 kg CO2e/ha) than from the sprinkler irrigation (3,347 kg CO2e/ha) farming system. Water efficiency modelling indicated that, on average, water savings of 18% are possible, while economic modelling indicated that the conversion of irrigation technology is a viable option. Even at a carbon price of AUD$30/tCO2e, investment in the sprinkler technology was an economically feasible option due to significant water savings and increased yield.
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Ford, J. L., G. R. Cousins, Z. Jahufer, I. J. Baird, D. R. Woodfield e B. A. Barrett. "Grasslands Legacy - a new, large-leaved white clover cultivar with broad adaption". Journal of New Zealand Grasslands 77 (1 de janeiro de 2015): 211–18. http://dx.doi.org/10.33584/jnzg.2015.77.458.
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White clover (Trifolium repens L.) continues to play a pivotal role in the Australasian pastoral industry, despite increased use of nitrogen fertiliser on farms. Improved white clovers for dairy farming must be well adapted to the farm systems they are intended for, including increased rates of fertiliser nitrogen, higher stocking rates and access to irrigation. The breeding objective was to develop a white clover cultivar in evaluation systems that simulate modern farming practices, and test that cultivar in both New Zealand and Australia for adaptation and agronomic merit. This included breeding and early generation evaluation at research farms in the Manawatu and Waikato, with subsequent evaluations in these locations and farms in Southland and Victoria, Australia. This resulted in 'Grasslands Legacy', a new large leaved white clover cultivar bred for New Zealand and eastern temperate Australian pastures, which has shown significant (P
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Stevens, D. P., M. J. McLaughlin e M. K. Smart. "Effects of long-term irrigation with reclaimed water on soils of the Northern Adelaide Plains, South Australia". Soil Research 41, n.º 5 (2003): 933. http://dx.doi.org/10.1071/sr02049.
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On a small scale, reclaimed water (RCW) use has been practised on the Northern Adelaide Plains (NAP) horticultural districts for more than 28 years. The RCW has had approximately 1.7 times the salinity and twice the sodium absorption ratio (SAR) of bore water commonly used for irrigation in the district. Recently, a large-scale reclamation scheme has been commissioned which could eventually supply approximately 30 GL of RCW to over 250 growers on the NAP. This study compared historical water quality and time of use data with physico-chemical properties of soil cores taken from sites where reclaimed (RCW-irrigated) or bore water had been used for irrigation, or sites that had not been irrigated (virgin). The aim was to determine if current farming practices irrigating with RCW could, now or in the future, lead to a decrease in yields through detrimental increases in soil salinity, sodicity, and boron (B) concentrations, and to determine if these changes were significantly different from bore-irrigated or virgin sites. Data suggested that changes in soil salinity and B concentration from RCW use would not decrease yields. However, changes in soil SAR had the potential to restrict drainage and consequently increase salinity; although a more functional critical SAR value for the NAP soils needs to be defined to assess this potential. These findings suggest that farming methods, in the 1967–95 period, did not address the physico-chemical changes associated with the use of more sodic RCW. Considering the future scale of RCW use, the SAR of the irrigation water may need to be decreased and/or appropriate farming methods developed and practised with the use of RCW to protect these soils for future horticultural activities. A low cost soil test, using a simple 1 : 5 soil : water extract was compared with accepted soil extracts (for assessing detrimental physico-chemical soil changes) and is proposed as a grower management tool to assist in monitoring the physico-chemical changes of the NAP soils.
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McDonald, L. M., P. Wright e D. A. MacLeod. "Nitrogen fixation by lablab (Lablab purpureus) and lucerne (Medicago sativa) rotation crops in an irrigated cotton farming system". Australian Journal of Experimental Agriculture 41, n.º 2 (2001): 219. http://dx.doi.org/10.1071/ea99143.
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Cotton producers in Australia are interested in including legume green manure crops in their farming systems. Lablab and lucerne are 2 crops that have been considered for this role. The object of this study was to determine their biomass production, nitrogen fixation, water use and water-use efficiency within a 1-year out-of-cotton rotation. Both species were grown under full irrigation, and partial irrigation, where periods of moisture stress occurred. During the period of the rotation, lablab produced more biomass and fixed more nitrogen than lucerne. Its biomass production was increased (from 9655 to 16 024 kg/ha) by full irrigation compared with partial irrigation, while lucerne biomass similarly increased (from 6563 to 8040 kg/ha). Lablab also fixed more nitrogen (177 kg N/ha) than lucerne (111 kg N/ha). Lucerne used more water than lablab and thus lablab had higher water-use efficiency of biomass production and nitrogen fixation. The study indicates that lablab produces more green manure with greater water-use efficiency than lucerne within a 1-year out-of-cotton rotation.
Teses / dissertações sobre o assunto "Irrigation farming (S.E.Australia)"
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Lewis, Marjorie Fay. "The significance of episodic recharge in the Wheatbelt of Western Australia /". Connect to thesis, 2000. http://eprints.unimelb.edu.au/archive/00000682.
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Esfandiari, Baiat Mansour, of Western Sydney Hawkesbury University, of Science Technology and Agriculture Faculty e School of Agriculture and Rural Development. "Evaluation of furrow irrigation models for south-east Australia". THESIS_FSTA_ARD_EsfandiariBaiat_M.xml, 1997. http://handle.uws.edu.au:8081/1959.7/739.
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The overall objective of this study was to evaluate the performance of selected furrow irrigation models for field conditions in south-east Australia. The other important aspects which were examined during this study include: developing a methodology for estimating of infiltrating characteristics, assessing the applicability of the Manning and other similar equations for flows in furrow irrigation, investigating the variation of shape factor during irrigation developing methodology for estimation of recession time and exploring the sensitivity of the models to the input parameters. Field experiments were conducted at Walla Park in northern N.S.W. and on two selected paddocks at the University Farm, Richmond, in western Sydney,Australia, over a period of three years. The validity of the assumption that the shape factor of advancing water front during furrow irrigation varies between 0.7 and 0.8 was investigated using field data collected from irrigation events monitored in the study. It was found that the average values of the shape factor varied from 0.96 to 1.80 at Walla Park site, from 0.56 to 0.80 at Field Services unit paddock site and from 0.78 to 0.84 at Horticulture Farm paddock site. The value of shape factor was affected by uniformity of furrow cross section along the length, the value and uniformity of furrow slope, furrow length and infiltration characteristics of soil. This means it is difficult to recommend a typical value for the shape factor for a given field situation.The performance of the models for prediction of advance and recession characteristics and runoff were evaluated using different indices of performance. In general, it was found that the Walker-HD and ZI model was the most satisfactory for the field conditions encountered in this study. This finding can provide a basis for initiating work on developing design criteria and management strategies for furrow irrigation in south-east Australia.Doctor of Philosophy (PhD)
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Esfandiari, Baiat Mansour. "Evaluation of furrow irrigation models for south-east Australia". Thesis, 1997. http://handle.uws.edu.au:8081/1959.7/739.
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The overall objective of this study was to evaluate the performance of selected furrow irrigation models for field conditions in south-east Australia. The other important aspects which were examined during this study include: developing a methodology for estimating of infiltrating characteristics, assessing the applicability of the Manning and other similar equations for flows in furrow irrigation, investigating the variation of shape factor during irrigation developing methodology for estimation of recession time and exploring the sensitivity of the models to the input parameters. Field experiments were conducted at Walla Park in northern N.S.W. and on two selected paddocks at the University Farm, Richmond, in western Sydney,Australia, over a period of three years. The validity of the assumption that the shape factor of advancing water front during furrow irrigation varies between 0.7 and 0.8 was investigated using field data collected from irrigation events monitored in the study. It was found that the average values of the shape factor varied from 0.96 to 1.80 at Walla Park site, from 0.56 to 0.80 at Field Services unit paddock site and from 0.78 to 0.84 at Horticulture Farm paddock site. The value of shape factor was affected by uniformity of furrow cross section along the length, the value and uniformity of furrow slope, furrow length and infiltration characteristics of soil. This means it is difficult to recommend a typical value for the shape factor for a given field situation.The performance of the models for prediction of advance and recession characteristics and runoff were evaluated using different indices of performance. In general, it was found that the Walker-HD and ZI model was the most satisfactory for the field conditions encountered in this study. This finding can provide a basis for initiating work on developing design criteria and management strategies for furrow irrigation in south-east Australia.
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Gardiner, Sharen M. "Risk factors for potentially toxic blue-green cyanobacterial blooms of Microcystis aeruginosa in recycled wastewater intended for agricultural irrigation". Thesis, 2019. http://hdl.handle.net/1959.7/uws:51477.
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The sudden and often unpredictable occurrence of potentially toxic cyanobacterial blooms in agricultural irrigation water presents a human and animal health hazard internationally. The cyanobacterium Microcystis aeruginosa produces a range of protein-phosphatase inhibitory microcystins which are the only cyanotoxins for which the World Health Organisation currently produces action thresholds. Contact with irrigation water and irrigated food containing cyanobacterial toxins has caused human illness and livestock deaths, and a suspect relationship with chronic neurodegenerative human diseases including Parkinson’s and Alzheimer’s has been proposed. Environmental risk factors for sudden cyanobacterial blooms are, however, poorly researched, motivating the current study which took place in the main storage dam of the Hawkesbury Water Recycling Scheme in North-Western Sydney. The main aim of this research was to examine interaction of the key chemical, physico-chemical and climatological factors affecting stored, recycled wastewater intended for agricultural irrigation and relate them to blooms of Microcystis aeruginosa over a one-year period (March 2016- March 2017). Multiple regression analysis results showed statistically significant correlations between potentially toxic cyanophyte (M. aeruginosa) abundance and DO (p = 0.002), and Total Organic Carbon (TOC) (p = 0.017) in a highly significant model (p = 0.006), with nine degrees of freedom. Significant correlations were not, however, obtained with algal-nutrient phosphate and nitrate in a range of redox states, suggesting that these were not growth limiting for toxin-producing bacteria in recycled water. This echoed an earlier research finding for enterococci in the same dam. Bivariate, linear regression supported these findings, in addition atmospheric temperature being identified as the most important climatological growth factor (r = +0.47). These findings are highly important in Australian dams due to an engineering strategy applied at sewage treatment plants (STP) to control both algae and cyanobacteria in water intended for discharge to receiving waters and for agricultural irrigation. The strategy involves encouraging denitrification by the addition of a high-carbon source such as soluble sludge organics or methanol in an anaerobic treatment environment. These research findings may explain the persistence of toxic blooms in algal-free environments following implementation of this practice. A number of recommendations are made future research to aid in planning interventions to avoid blooms and preserve the integrity of stored, recycled water supplies in Australia.
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Jiang, Qiang. "Three essays on water modelling and management in the Murray-Darling Basin, Australia". Phd thesis, 2011. http://hdl.handle.net/1885/151262.
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The primary contributions of this thesis are the economic studies of proposed water use reductions and climate change, and the development of an integrated hydro-economic model for the Murray-Darling Basin, Australia. This water model not only simulates the land and water use in the Basin, but also optimises these uses for certain targets such as environmental flows. More importantly, this model can be applied to evaluate policy options for the Basin, such as water buybacks, and provide estimates of the possible impacts of climate change.
The thesis consists of three main essays focusing on issues in water modelling and management in the Basin. The first essay describes the development of a water model. This model is applied to estimate the impacts of water use reductions in the second essay; and climate change in the third essay. Other issues related to the Basin's water management, such as a review of existing water modelling, the background of the Basin, water trading, possible policy implementations and future research are also discussed.
The first essay (Chapter 4) describes the construction of the Integrated Irrigated Water Model (IIA WM) including the structure of llA WM and the data sources. Using the latest hydrological data and revised catchment boundaries, llA WM can simulate and optimise land and water use in the Basin. To address the criticism that existing models have failed to consider water trading barriers, the physical constraints on water trading have been incorporated in llA WM. The model can also evaluate various water policies and estimate the impacts of physical condition changes.
The second essay (Chapter 5) evaluates the impacts of proposed water use reductions by the Australian government. To balance the use of water between irrigated industries and environmental purposes, the Australian government draft plan released October 2010 proposed to reduce the volume of used water in the Basin from 3,000 to 4,000 GL/year. Simulations from IIA WM indicate that the impacts from proposed water use reductions will be modest, although there may be substantial impacts in particular locations.
The third essay (Chapter 6) investigates the impacts of climate change in the Basin. A full range of climate change scenarios from modest to severe have been applied using IIA WM. This thesis finds that with water trading, profit reductions are substantially smaller than the water use reductions.
Livros sobre o assunto "Irrigation farming (S.E.Australia)"
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Bryant, Lia, e with Jodie George. Water and Rural Communities: Local Politics, Meaning and Place. Routledge, 2016.
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Water and Rural Communities: Local Politics, Meaning and Place. Taylor & Francis Group, 2016.
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Bryant, Lia, e with Jodie George. Water and Rural Communities: Local Politics, Meaning and Place. Taylor & Francis Group, 2016.
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Bryant, Lia, e with Jodie George. Water and Rural Communities: Local Politics, Meaning and Place. Taylor & Francis Group, 2019.
Encontre o texto completo da fonteCapítulos de livros sobre o assunto "Irrigation farming (S.E.Australia)"
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Alston, Margaret. "Gender, Politics, and Water in Australia and Bangladesh". In People and Climate Change, 165–83. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190886455.003.0009.
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In the wake of climate change, environmental degradation, and increasing global populations, food and water security are under threat throughout the world. This chapter focuses on the impacts of climate change on water security in Australia and Bangladesh, noting in particular the gendered implications and the way policies influence and shape gendered responses. In Bangladesh, for example, following disasters, access to safe, uncontaminated water may involve women walking significant distances. Australian research has examined the impact of water policies on gendered livelihood strategies as farming families readjust to their reduced access to irrigation water. A critical feature of this chapter is an examination of the way water has become “commodified” and reconfigured around new forms of market value. The chapter poses questions about the ongoing impact of water insecurity in the face of predicted and extreme climate events.
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Sivagami, Arasu, Michael Angelo Kandavalli e Bhaskarrao Yakkala. "Design and Evaluation of an Automated Monitoring and Control System for Greenhouse Crop Production". In Next-Generation Greenhouses for Food Security. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97316.
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An embedded system integrated with sensors based on nanomaterial is proposed for closely monitoring and control microclimate parameters 24 hours a day to maximise production over the whole crop growth season by introducing greenhouse for the cultivation of plants or specific plant species. The system will also eliminate errors in human intervention to optimise production of crops. This system consists of sensors and actuators, an Analogue to Digital Converter (ADC) and a Raspberry Pi. The system will determine whether a defined threshold is passed by any climate parameter and systematically changes via the controller. The current work reduces human input through automated irrigation to optimally utilize a scarce resource, namely water. Climatic parameters for plant growth such as, moisture, humidity, temperature, water pressure in drip pipe, soil salinity etc. are monitored and optimized. Furthermore, work was extended to include GSM to control the entire farm remotely. For its success, it is very important to choose a greenhouse location. For instance, the problems are quite different when choosing an adjoining greenhouse, for instance a sunroom or greenhouse. The greenhouse location should be chosen for sunlight, proximity to power and water sources, wind, drain and freeze pockets, and the proximity of the garden and house. The intention behind accomplishment and devise of GSM based Fertigation System is to construct and evaluate the requirement of water in the yield as farming is the major resource of production which habitually depends on the water accessibility. Irrigation of water is usually done by manual method. To ease the work of the farmer GSM based automatic Fertigation (includes chemigation too) system can be implemented so that water wastage can be reduced and also the fertilizer can be added accordingly. Also the Soil Salinity can be checked and reduced if exceeds certain limit. By using GSM, only GSM command via GSM mobile can control the start and stop action of a motor that feeds the field with the water. GSM is used for controlling the entire process and the entire system backbone. It can be used from any distance to control irrigation. The results are assessed by electronic simulator PROTEUS using the desired optimised parameters, the design of this automated greenhouse system with PIC controller. As the inputs to the microcontroller and as an LCD screen record the respective outputs, the model produces a soil moisture sensor, light sensor and temperature sensor. The system performance is accurate and repeatable for measuring and controlling the four parameters that are crucial for plant growth - temperature, humidity, soil moisture and light intensity. With the reduction in electricity consumption, maintenance and complexity, and a flexible and precise environment control form for agriculture, the new system successfully cured quite a couple of defects in existing systems. Nano composite film sensors (Graphene and Graphene mixed in order to optimise the input of fertilisers for chemical composition determination. Using nano technology in agriculture enforces the firm bond between the engineer and farmer. Nano material film-based gas sensors were used to measure the presence of oxygen and CO2.using graphene nano composite sensors integrated into an embedded system, to detect the presence and levels of gases. Improve crop growth with combined red and blue light for lighting under the leavened and solar-powered LED lighting modules. This was achieved by graph/solar cells. The light was measured at the photosynthesis flux (PPFD) of 165 μmol m-2 s-1 by 10 cm of its LED module. LED lights were provided between 4:00 a.m. and 4:00 p.m. in the daytime treatments and night treatments from 10 to 10 hours. The use of the nighttime interlumination of LEDs was also economical than the interlumination of charts. Thus, nightlighting LEDs can effectively improve plant growth and output with less energy than the summer and winter times. Solar panels are best functioning during times of strong sunlight today, but begin to wan when they become too hot and cloudy. By allowing Solar Panels to produce electricity during harsh weather conditions and increase efficiency, a breakthrough in graphene-based solar panels can change everything. Ultimately with a fully autonomous system, agricultural productivity and efficiency, the length of the growing season, energy consumption and water consumption were recorded and monitored by exporting the data over GSM environment. With the steady decrease in the cost of high-performing hardware and software, the increased acceptance of self-employed farming systems, and the emerging agricultural system industry, the results will be reliable control systems covering various aspects of quality and production quantity.
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"waterbird populations and provide additional mosquito breeding habitats, which would be conducive to increased arbovirus activity (Stanley 1972; 1975). Indeed the potential problems were expected to become more acute as the population in the area increased with the development of Kununurra township and nearby farming activities, and with increased tourism and mining opportunities. More than sixty-five arboviruses have been isolated in tropical Australia, but only a few have been implicated in human disease (Mackenzie et al. 1994a). These include the flaviviruses Murray Valley encephalitis (MVE), Kunjin, Kokobera, Alfuy, Edge Hill and dengue; and the alphaviruses Ross River, Barmah Forest, and Sindbis (Mackenzie et al. 1994a; 1994b). With respect to the Ord River irrigation area, the most important of these viruses is MVE, the major cause of Australian encephalitis. MVE virus has a natural biocenose between waterbirds, particularly members of the order Ciconiiformes, and mosquitoes, particularly the fresh-water breeding species, Culex annulirostris. MVE virus is a member of the Japanese encephalitis serological complex of flaviviruses, and is more closely related to Japanese encephalitis virus than are the other Australian members of the complex (Kunjin, Kokobera, Alfuy and Stratford viruses)." In Water Resources, 127. CRC Press, 1998. http://dx.doi.org/10.4324/9780203027851-20.
Texto completo da fonteTrabalhos de conferências sobre o assunto "Irrigation farming (S.E.Australia)"
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McComb, Christopher, Nathan G. Johnson e Brandon T. Gorman. "Scenario-Based Robustness Analysis of Optimized I.D.E.-Style Treadle Pump Designs". In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-60127.
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Poverty affects hundreds of millions of people globally. Market-based strategies can help alleviate poverty in developing countries by encouraging entrepreneurial activity and have the potential to be more effective than traditional approaches, such as development aid from countries or non-governmental organizations. Development organizations often target the agricultural sector because of the prevalence of subsistence and small-scale farming, particularly in rural regions of developing countries. Improving the reliability of irrigation techniques can help farmers expand out of primarily subsistence farming and begin to sell a portion of their crop, thus achieving the objectives of market-based poverty alleviation. Human-powered pumps are a popular tool used in irrigation because they require low capital cost and negligible operating cost. Previous work provided a model for finding Pareto-optimal IDE-style treadle pump designs. This work utilizes that model to produce a dense set of Pareto-optimal designs, and then investigates the robustness of the designs by simulating their performance in a variety of modified use scenarios. Our results show that pumps optimized for low flow rates (less than 3.0 L/s) are highly robust, particularly with respect to age-related changes in the operator’s stature or mobility. In addition, these pumps can operate with near-optimal efficiency across a variety of target flow rates and well depths. These pumps are ideal for single family use or for shared use amongst multiple families in a village. Pumps optimized for flow rates greater than 3.0 L/s are less robust with respect to changes of operator stature (experiencing decreases in flow rate of up to 60%) but may be suitable for use on farms or by service providers.
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Khan, Md Mesbah-ul Ghani. "Sowing Wind Turbines for Reaping the Clean and Competitive Energy: A Renewable Free Energy Resource Able to Supplement Energy Needs of Bangladesh". In ASME 1997 Turbo Asia Conference. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-aa-043.
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World is now endangered by the threat of fuel source scarcity and environmental degradation. Researchers all over the world are searching for the alternative energy resources to supplement the present energy needs and to conserve the conventional resources from depletion which are less costly and environmentally friendly. Harnessing the wind power and its utilization is one of the best possible answers. Investigations for recent years have revealed that wind energy has been the great deals to the rural farmers for their water pumping. Wind power can be used effectively in maintaining livestock, water supply, fish & ice farming, water desalination, sawing wood, irrigation, electrification, agricultural operations etc. If all possible considerations are given in exploiting wind energy, in the coming 4 to 5 decades it can meet 30% to 45% of the world’s total energy demand contributing no unwanted emissions into the atmosphere. It can adjust more jobs and occupies fewer lands. It is cheaper than any other sources. Bangladesh possesses flat terrain, hilly & mountainous regions, open river banks & harbors, and a vast lengthy coastal belt by the sea “the Bay of Bengal” where reasonable wind flow round the year available. For most of the said areas, electricity supply from the mother grid is almost inaccessible due to various difficulties and limitations. Moreover, a total of 2105 MW national generation capability absolutely unable to meet the present suppressed peak demand of 2114 MW for the consumers already in the grid. This continuously causing a severe regular load shedding up to 30% of the peak demand. The large sized population of the above areas is being maintained over decades mostly from fuel wood, charcoal plant & agricultural residues, dung and very few from imported petroleum and derivatives as the only energy sources. The energy scarcity let the locality remained economically backward and noncontributing to the GDP. In some of the areas namely Chittagong Harbor, Coastal belts & City periphery, from recent observations the monthly mean wind speeds (m/s) ranging between 4.5 and 8.5 are recorded which show the genius prospect of reaping wind power in Bangladesh. Despite a promising future of this free fuel, benefits for utilizing this energy in Bangladesh are being missed because too little is known about either the resource or the technology. Wind energy can successfully be utilized in utility for supplementing our generation and to meet decentralized needs or wind-solar hybrids for Bangladeshi modern multistory buildings which are now meeting their energy deficit by individual diesel generators at higher money and environmental costs. In the context of Bangladesh, wind power to come to use, this paper is an attempt to describe the methodologies for site selection; wind data collection & regime modeling; power availability, conversion & storage; turbine performance monitoring & augmenting wind speed using cloth scoops including costs and environmental impact Assessment. This paper also discusses Bangladesh energy scenario and strategies for meeting deficit demand and summarizes global wind development and proposes that Bangladesh government and other agencies must take immediate initiatives towards implementing wind projects.