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Articles de revues sur le sujet "Cattle dip Environmental aspects"
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Strandberg, E., M. Felleki, W. F. Fikse, J. Franzén, H. A. Mulder, L. Rönnegård, J. I. Urioste et J. J. Windig. « Statistical tools to select for robustness and milk quality ». Advances in Animal Biosciences 4, no 3 (juillet 2013) : 606–11. http://dx.doi.org/10.1017/s2040470013000162.
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This work was part of the EU RobustMilk project. In this work package, we have focused on two aspects of robustness, micro- and macro-environmental sensitivity and applied these to somatic cell count (SCC), one aspect of milk quality. We showed that it is possible to combine both categorical and continuous descriptions of the environment in one analysis of genotype by environment interaction. We also developed a method to estimate genetic variation in residual variance and applied it to both simulated and a large field data set of dairy cattle. We showed that it is possible to estimate genetic variation in both micro- and macro-environmental sensitivity in the same data, but that there is a need for good data structure. In a dairy cattle example, this would mean at least 100 bulls with at least 100 daughters each. We also developed methods for improved genetic evaluation of SCC. We estimated genetic variance for some alternative SCC traits, both in an experimental herd data and in field data. Most of them were highly correlated with subclinical mastitis (>0.9) and clinical mastitis (0.7 to 0.8), and were also highly correlated with each other. We studied whether the fact that animals in different herds are differentially exposed to mastitis pathogens could be a reason for the low heritabilities for mastitis, but did not find strong evidence for that. We also created a new model to estimate breeding values not only for the probability of getting mastitis but also for recovering from it. In a progeny-testing situation, this approach resulted in accuracies of 0.75 and 0.4 for these two traits, respectively, which means that it is possible to also select for cows that recover more quickly if they get mastitis.
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Bonifacio, Henry F., C. Alan Rotz et Tom L. Richard. « A Process-Based Model for Cattle Manure Compost Windrows : Part 2. Model Performance and Application ». Transactions of the ASABE 60, no 3 (2017) : 893–913. http://dx.doi.org/10.13031/trans.12058.
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Abstract. A model was developed and incorporated into the Integrated Farm System Model (IFSM, v.4.3) that simulates important processes occurring during windrow composting of manure. The model, documented in an accompanying article, predicts changes in windrow properties and conditions and the resulting emissions of C and N. Our objective in this article was to evaluate the performance of the compost windrow model. Model predictions were compared to published data from an independent cattle manure composting study that characterized static (no turning) and turned windrows composted over a 188-day period. The model did very well in simulating C and N losses for the turned windrow treatment, with predicted and measured cumulative C losses of 78% and 77%, respectively, and cumulative N losses of 55% and 57%, respectively, by day 99 of composting. By day 188 of composting, predicted cumulative N loss (56%) differed from measured (58%) by 2 percentage points only, whereas predicted cumulative C loss matched the corresponding measured value (80%). For the static windrow treatment, the model also did well in simulating cumulative C loss by day 99, with a difference of 5 percentage points between predicted (50%) and measured (45%) values. On the other hand, there was a difference of 12 percentage points between predicted (31%) and measured (19%) cumulative N losses for the static windrow by day 99. This discrepancy in simulating N loss for the static windrow treatment was not surprising, as the NH3 biofiltration effect of the finished compost cover on the actual static windrow was not modeled. After simulating the turning of the static windrow treatment on day 99, predicted and measured cumulative N losses by day 188 were equal at 44%. With the compost windrow model as a component, IFSM can be used to evaluate gaseous emissions from composted manure as influenced by windrow management practices and environmental conditions, along with other aspects of performance, environmental impact, and economics of cattle feeding operations. Simulating different composting strategies showed that addition of dry material to the cattle manure at the start of composting and turning of the manure windrow during composting produced a more stable organic soil amendment but caused greater carbon and nitrogen losses. Keywords: Cattle manure, Composting, Emissions, IFSM, Process-based modeling.
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Gaughran, Aoibheann, Enda Mullen, Teresa MacWhite, Peter Maher, David J. Kelly, Ruth Kelly, Margaret Good et Nicola M. Marples. « Badger territoriality maintained despite disturbance of major road construction ». PLOS ONE 16, no 9 (3 septembre 2021) : e0242586. http://dx.doi.org/10.1371/journal.pone.0242586.
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Road ecology has traditionally focused on the impact of in-situ and functional roads on wildlife. However, road construction also poses a major, yet understudied, threat and the implications for key aspects of animal behaviour are unknown. Badgers (Meles meles) have been implicated in the transmission of tuberculosis to cattle. There are concerns that environmental disturbances, including major road construction, can disrupt badger territoriality, promoting the spread of the disease to cattle. To address these knowledge gaps the ranging behaviour of a medium-density Irish badger population was monitored using GPS-tracking collars before, during, and after a major road realignment project that bisected the study area. We estimated badgers’ home range sizes, nightly distances travelled, and the distance and frequency of extra-territorial excursions during each phase of the study and quantified any changes to these parameters. We show that road construction had a very limited effect on ranging behaviour. A small increase in nightly distance during road construction did not translate into an increase in home range size, nor an increase in the distance or frequency of extra-territorial excursions during road construction. In addition, suitable mitigation measures to prevent badger deaths appeared to ensure that normal patterns of ranging behaviour continued once the new road was in place. We recommend that continuous badger-proof fencing be placed along the entire length of new major roads, in combination with appropriately sited underpasses. Our analysis supports the view that road construction did not cause badgers to change their ranging behaviour in ways likely to increase the spread of tuberculosis.
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Clegg, F. G., C. Wray, A. L. Duncan et W. T. Appleyard. « Salmonellosis in two dairy herds associated with a sewage farm and water reclamation plant ». Journal of Hygiene 97, no 2 (octobre 1986) : 237–46. http://dx.doi.org/10.1017/s0022172400065323.
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SummaryTwo dairy herds, situated on a sewage farm, were monitored for the presence of salmonellas following outbreaks of Salmonella dublin infection. In addition an S. dublin control scheme, which involved examination of adult animals and calf vaccination, was instigated.During the period 1975–84, 12 salmonella serotypes and 10 phage types of S. typhimurium were isolated from the cattle and their environment although their presence was seldom associated with disease. Two adult S. dublin excreters were detected but it was concluded that none of the tests employed to examine the adult animals was sensitive enough. The prevalence of disease in the calves was low and although vaccination may have been beneficial it did not eradicate S. dublin infection. Thus S. dublin persisted in adults and calves during the 8-year period but its presence was seldom associated with disease. The results are discussed with regards the disease risk to animals from the agricultural use of sewage sludge and the public health aspects.
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Ceballos, B. S. O., N. E. Soares, M. R. Moraes, R. M. R. Catão et A. Konig. « Microbiological aspects of an urban river used for unrestricted irrigation in the semi-arid region of north-east Brazil ». Water Science and Technology 47, no 3 (1 février 2003) : 51–57. http://dx.doi.org/10.2166/wst.2003.0159.
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This study compared the behaviour of pathogenic bacteria (Salmonella and Listeria), faecal indicators (faecal coliforms FC and faecal streptococci FS), somatic coliphages and F-specific bacteriophages in an urban river contaminated with domestic sewage and surface run-off from agricultural and cattle grazing lands. The influence of physical and chemical parameters was also investigated as well as Salmonella and Listeria serotype diversity and drug resistance patterns. Faecal contamination was high (FC = 5 × 106 - 4 × 103 CFU/100 mL; FS = 4 × 105 - 2 × 102 CFU/100 mL) but decreased along the river by up to 99.5% following 47% reduction of BOD5 and 91% increase of DO, both associated with the self purification process. Somatic coliphages (6.9 × 105 - 1 × 103 PFU/100 mL) and F-specific bacteriophages (5.8 × 104 - 65 PFU/100 mL) behaved similarly with reductions of 99.85%. Salmonella and Listeria were isolated at all sampling points with highest frequencies (91-100%) at those with sewage discharge and rural water run-off. The lowest value (35%) occurred at the end of the river where it was (a) wider and shallower, (b) it ran slower and was warmer (29-33°C), (c) the pH was alkaline (8.2-9.9), (d) electrical conductivity (2,200-5,800 μS/cm) and DO (6-13 mg/L) were highest. Pathogen decline did not follow exactly FC and FS reduction patterns, while physical and chemical parameters apparently did not interfere with Salmonella and Listeria survival to the same extent as they did with FC and FS. Somatic coliphages and F-specific bacteriophages did not show more resistance than bacterial indicators. Catchment area contribution seemed to be more significant for pathogens than for indicators and rainy periods increased pathogenic isolation frequency. Five Salmonella serotypes and five serogroups were identified. S. hadar and serogroup E were predominant (50%); both are increasing in Brazil apparently from animal sources. Nearly 25% of Salmonella strains were resistant to at least one of twelve antimicrobials tested. Resistance to tetracycline was common (17%) followed by cefalotine (3%). Five Listeria serogroups were isolated and L. grayi (43%) and L. monocytogenes (9%) were present at all points. Listeria drug resistance rates were 100% for oxaciline followed by clindamicine (97%), tetracycline (34%) and vancomycin (32%). Both pathogenic bacterial strains presented resistance to the same drugs observed in humans and warm blood animals but the high number of sensitive strains and the low numbers of strains resistant to more than one drug was not expected because of the heavy anthropogenic impact in this basin.
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Melo Nunes Astolfi, Angelica Christina, Lucas Junior Da Silva Mota, Montcharles Da Silva Pontes, Leyzinara Zenteno Clemente, Etenaldo Felipe Santiago, Laércio Alves De Carvalho et Ivo De Sá Motta. « MORPHOLOGICAL ANALYSIS AND ACCUMULATION OF NUTRIENTS IN Peltophorum dubium (Spreng.) Taub. SEEDLINGS PRODUCED IN ORGANIC SUBSTRATES WITH DIFFERENT PROPORTIONS ». JOURNAL OF NEOTROPICAL AGRICULTURE 7, no 3 (9 septembre 2020) : 29–38. http://dx.doi.org/10.32404/rean.v7i3.4093.
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Environmental conservation and regeneration actions must consider plant species that add value by restoring structural and functional aspects of the ecosystem. The forest species, Peltophorum dubium, has several characteristics that make its use viable in projects of restoration of degraded areas, making it necessary to study the species' responses to different cultivation environments. Thus, 500 seeds were selected and sown in vermicompost substrates prepared with different proportions of cattle rumen content (CR) and sugarcane bagasse (SB) (V1 - 60% CR x 40% SB / V2 - 50% CR x 50 % SB / V3 - 40% CR x 60% SB / V4 - 70% CR x 30% SB) and in an commercial substrate (Plantmax®). At 79 days after sowing, 20 seedlings per treatment were removed; they were weighed and measured, resulting in growth, dry matter, and vigor data. The vermicompost substrates were sent to the chemical analysis laboratory to determine their chemical composition. The data were submitted to normality analysis. Analysis of variance was performed for normal data and the Kruskal Wallis test for data that did not show normality. The means or medians were compared using the Tukey test at a 5% probability level. Based on the results related to the growth and vigor of P. dubium seedlings, it is possible to state that the productive potential of the species was higher in the vermicompost substrates.
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Bhat, Somanath, Xi Luo, Zhiqiang Xu, Lixia Liu et Ren Zhang. « Bacillus sp. CDB3 isolated from cattle dip-sites possesses two ars gene clusters ». Journal of Environmental Sciences 23, no 1 (janvier 2011) : 95–101. http://dx.doi.org/10.1016/s1001-0742(10)60378-6.
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Hegyi, Andreea, M. Păstrav et M. Rus. « Environmental And Economic Aspects Of Anticorrosion Protection By Hot-Dip Galvanized Method Rebars In Concrete ». Journal of Applied Engineering Sciences 5, no 1 (1 mai 2015) : 23–30. http://dx.doi.org/10.1515/jaes-2015-0003.
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Abstract The implementation of the sustainable development concept is nowadays a key issue in almost all human activities. For the constructions domain an European strategy has already been elaborated. Among its goals are also the use of long lasting materials and the reduction of repair costs. This paper presents an interdisciplinary study concerning the efficiency of the use of hot-dip galvanized rebar for concrete structures. Experimental results about corrosion kinetics of coated and usual steel reinforcement embedded in concrete, subjected to chlorine ions attack, are analyzed. Electrochemical methods as chronoamperometry and linear polarization have been used. Corrosion potential values recorded for galvanized steel embedded in concrete indicate an uncertain corrosion activation process up to a rate of 2.5 % calcium chloride relative to concrete. For rates of 5% CaCl2 and more the corrosion process is activated. For unprotected steel bars embedded in concrete the corrosion activation process started at all calcium chloride studied rates and higher corrosion potential values has been registered than for the hot-dip galvanized ones, at the same rates. Economical assessments have been done using entire lifetime cost analysis of the reinforced concrete structures. Despite that the hot-dip galvanization is a rather expansive procedure, when taking into account the whole expected life span, the use of zinc coating proves to be efficient both from structural and financial approaches.
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McLaren, R. G., R. Naidu, J. Smith et K. G. Tiller. « Fractionation and Distribution of Arsenic in Soils Contaminated by Cattle Dip ». Journal of Environmental Quality 27, no 2 (mars 1998) : 348–54. http://dx.doi.org/10.2134/jeq1998.00472425002700020015x.
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Zairiful, A. A. Candra et N. Irwani. « Environmental Aspect Beef Cattle on Smallholder Farms ». IOP Conference Series : Earth and Environmental Science 1012, no 1 (1 avril 2022) : 012002. http://dx.doi.org/10.1088/1755-1315/1012/1/012002.
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Abstract Public awareness of the importance of animal protein makes meat as one of the livestock products that is increasingly in demand. Beef cattle are one of the most popular livestock in the livestock sector. The ability of beef cattle to produce meat in both quality and quantity is influenced by genetic and environmental aspects. Environmental aspects that influence are maintenance, feed, reproductive management and health. One of the efforts to increase beef cattle productivity is through disease control. One of the diseases that cause reduced live weight of beef cattle is intestinal worms. The purpose of this study was to determine the prevalence of helminthiasis in one of the people’s beef cattle centers, namely Negeri Katon sub-district, Pesawaran district. Stool samples were taken from smallholder farmers, then tested by the flotation method. The positive sample is then followed by an identification test to analyze the type of parasitic worm that infects. To determine the severity of infection, eggs per gram of stool were tested using the whitlock method. The prevalence of helminthiasis in the sub-district of Negeri Katon, Pesawaran Regency is 85.15%. The worms that infect the beef cattle in the sub-district of Negeri Katon, Pesawaran Regency are species of Mecistocirrus, Moniezia, Toxocara, Haemonchus sp. Nematodirus, Bunostomum, Cooperis, Trichostrongylus, Oesophagostomum, Trichuris and Ostertagia sp. The highest worm/helmint infection in smallholder beef cattle in the Negeri Katon district was infection by Mecistocirrus, Haemonchus and Oesophagostomum. The moderate degree of worm infection is infection caused by Haemonchus sp, Nematodirus, Bunostomum, Cooperia, Trichostrongylus, Trichuris, Ostertagia sp, Mecistocirrus, Moniezia, and Toxocara.
Thèses sur le sujet "Cattle dip Environmental aspects"
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Edvantoro, Bagus Bina. « Bioavailability, toxicity and microbial volatilisation of arsenic in soils from cattle dip sites ». Title page, Contents and Abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09A/09ae24.pdf.
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Deresz, Fermino. « Effect of different cooling systems on concentrations of certain hormones and free fatty acids at varying times during lactation of Holstein cows ». Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184260.
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In experiment 1, fourteen cows were blocked for milk yields and balanced for days in lactation. Treatments were: (1) Air conditioning (AC), five cows; (2) Evaporative cooling (EC), four cows; and (3) Conventional shade (S), five cows. Sequential samples were taken for 8 h at 12 min intervals starting at 2200 and then at hourly intervals for 13 h. Serum was assayed for insulin, thyroxine (T4), triiodothyronine (T3) and cortisol using a double-antibody radioimmunoassay procedure. Free fatty acids (FFA) were determined in serum by an enzymatic method. In experiment 2, ten cows were blocked for milk yields and days in lactation. Treatments were: (1) Evaporative cooling (EC), five cows; and (2) conventional shade (S), five cows. Blood was drawn at 60 and 90 d of lactation. Blood sampling, hormone and FFA assays were carried out as in experiment 1. Sequential samples were taken for 8 h at 12 min intervals starting at 2300 and then at hourly intervals from 1030 to 1830. In experiment 1, insulin was depressed (P <.05) treatment effects for T3 in either experiment. There were significant treatment differences (P <.05) in respiration rates and body temperatures in experiment 1. Shade were higher than AC or EC cows. These studies demonstrated that summer heat stress depressed insulin and increased FFA with variable effects on T4 and cortisol but no effect on T3.
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Higginbotham, Gerald Ernest. « Influence of protein level and degradability on performance of lactating cows during hot and cool environmental temperatures ». Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184265.
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One hundred and twenty lactating Holstein cows in mid-lactation were offered diets varying in protein level and degradability at two locations during hot and moderate weather. Treatments were: (1) High protein (19%), high degradability (65%); (2) High protein (19%), medium degradability (40%); (3) Medium protein (15.5%), high degradability (65%); (4) Medium protein (15.5%), medium degradability (40%). Diets were individually fed during hot weather at the University of Arizona Dairy Farm and contained 38.4% alfalfa hay, 12.4% cottonseed hulls, 9.8% whole cottonseed, and 39.4% concentrate (dry matter). Diets were group fed during moderate weather at the Brigham Young University Dairy Farm, Provo, Ut, and contained 31.3% corn silage, 14% alfalfa haylage, 9.4% whole cottonseed and 45.3% concentrate (dry matter). Average daily ambient temperatures were 35.1°C for hot and 26.8°C for moderate weather locations. Fat-corrected milk (3.5%, 2 x milkings) and milk persistency were lower for treatment 1 than other treatments. For the respective treatments during hot weather means were: 23.4, 26.6, 28.5, 28.4 kg/d; 83.2, 91.2, 90.9, 90.3%; and for moderate weather means were: (3 x milkings): 34.7, 31.8, 32.2, 32.4 kg/d; 97.0, 93.4, 92.1, 90.3%. Dry matter intakes during hot weather were 21.5, 21.9, 23.3, and 23.1 kg/d. Respiration rate and rectal temperature during hot weather were: 90.1, 87.9, 90.9, 94.7 counts/min; 39.0, 39.3, 39.3, 39.5°C and for moderate weather: 61.2, 58.2, 55.5, 67.4 counts/min; 38.8, 38.6, 38.7, 38.8°C. Serum T₃,T₄ and cortisol were generally unaffected by treatment, but were depressed during hot weather. Serum glucose was not significantly affected by treatments at either environmental locations. Animals consumed more water with highly degradable protein diets at each location along with consuming more water during thermal stress. These data show that 3.5% fat-corrected milk and milk persistency are significantly affected (P <.01; P <.025) by rations high in protein of high degradability during heat stress.
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Jiao, You 1966. « Phosphorus sorption and release as influenced by fertilizer sources in conventional and no-tillage agroecosystems ». Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100631.
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Eutrophication resulting from phosphorus (P) accumulation in water systems has been a worldwide concern for three decades. Agricultural soils are known to be an important non-point source of P in waterways. The objectives of this research are to identify agricultural management practices that reduce the risk of P loss from soils, and to investigate the underlying mechanisms of P retention and loss from soils. In the short term (4 years), dissolved P loads were not affected by tillage and were similar in corn (in a continuous corn rotation) and soybean (in a soybean/corn rotation) production systems. Soils amended with composted cattle manure had a greater P load than chemically fertilized soils. On average, 30% of the total P leached was in organic P forms, indicating that organic P compounds could also be problematic to water systems. Although manure application improved soil aggregation and thus may increase P retention by avoiding soil erosion, P loss through subsurface flow by leaching may be substantial. A simple soil test, either Mehlich-3 P or P saturation ratio can predict the P leaching potential, but water ponding on the surface of agricultural land could significantly affect the accuracy of the prediction.The P adsorption data was fit with the Langmuir 2-surface model, which predicted that up to 90% of the native adsorbed P was distributed on the high-energy surface. Native adsorbed P in manured soils was weakly retained, as the binding strength coefficient was 50 times less in manured than chemically fertilized soil. This findings was confirmed by measuring P desorption, which showed that P desorption rate was almost 3 times greater from manured soils than from chemically fertilized soils. Manuring alters soil particle surfaces by increasing negative charge. This is the direct reason for less P adsorption and greater P desorption by manured soils.
The Langmuir 2-surface model and the adapted non-ideal competitive adsorption (MICA) model were equally good at modeling P adsorption data. However, the NICA model is more robust and can predict phosphate adsorption with changing soil solution pH. The simultaneously modeling of P adsorption and hydroxyl adsorption with the NICA model makes it a promising tool for analyzing competitive adsorption among anions in soils.
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Blackburn, Lynda G. « Quantification and estimation of nitrous oxide emissions from dairy manure applications in a western Quebec pea-forage and an eastern Ontario alfalfa-forage cropping system : by Lynda G. Blackburn ». Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100771.
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Agricultural systems are known to emit nitrous oxide (N2O)---a potent greenhouse gas. The roving flux tower measuring system of Agriculture and Agri-Food Canada was used to make continuous measurements of N2O fluxes in an edible pea field in Western Quebec in 2003-04 and then in an alfalfa-timothy forage field in Eastern Ontario in 2004-05. The experiment was designed to capture, at the field scale, the expected large N2O emissions occurring as a result of fertilizer application for a year, in relation to both large precipitation events and spring thaw.Growing season N2O emissions averaged 0.5 to 5 mg N2 O-N m-2 d-1 with peaks following snow melt (between 5 and 8 mg N2O-N m-2 d-1) and manure applications (8 to 37 mg N2O-N m-2 d -1). Although generally small (<0.25 mg N2O-N m -2 d-1), emissions were detectable during the fall and winter, indicating the importance of including them in annual emission totals.
The measurements were used to verify the performance of the simulation model DNDC (DeNitrification-DeComposition) in estimating N2O emissions from legumes and in response to dairy manure application. Sensitivity tests were also carried out in which baseline input values were modified. Results suggest that the current model version (DNDC8.9) requires further modification prior to application for estimating greenhouse gas emissions in national accounting systems.
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Borucki, Castro Sylvia Irene. « Altering electrolyte balance of diets for lactating dairy cows to reduce phosphorus excretion to the environment ». Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=78324.
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The study was designed to test the hypothesis that P excretion in manure of dairy cattle could be reduced by manipulating electrolyte balance of the diet. Feces was the main route of P excretion, but fecal P was not affected by dietary cation-anion (DCAB) (P > 0.05). Plasma concentration of P tended (P < 0.10) to be higher at lower DCAB levels, implying that DCAB may have influenced P homeostasis. The overall P balance was not affected by the different DCAB levels. The range of DCAB where both P excretion and animal performance could be optimised is very narrow (+250 to +350 mEq/kg DM), so using DCAB to control P excretion in dairy cattle requires caution. (Abstract shortened by UMI.)
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Cantin, Jean. « The environmental risks linked to different manure application periods / ». Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99326.
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More intensive production of hogs and cattle in Quebec during the past decade has benefited local economies, but led to over-fertilization of agricultural soils and eutrophication of waterways. Provincial ministries responded to this issue by developing regulations to control manure applications. The objective of this thesis was to determine the environmental risk associated with applying farm manure in the late fall. Spreading manure in fall after harvesting corn was a common practice for many agricultural producers in Quebec, but this period is now viewed as very risky, having more negative environmental consequences than other manure application periods. This two-year study used common diagnostic tools to compare the fertilization efficiency of solid dairy farm manure (DFM) spread in early fall, late fall and spring on a heavy clay soil used for corn production. In the first year, when DFM was the only nutrient source, there was no difference in corn yield that could be attributed to the manure application period. In the second year, each DFM plot was split and six levels of inorganic fertilizer (from 55 to 240 kg N ha-1) were applied ("Strip Split Plot") after planting. Corn tissue analysis (chlorophyll content, leaf N content at silking, cornstalk NO3 concentration) indicated that more residual N was supplied from late fall manure application than other manure application periods. Monitoring of soil NO3-N concentrations indicated that most of the NO3-N migration through the soil profile occurred after the early fall manure application. Late fall manure application appears to be the most efficient at supplying N for corn production, without deleterious environmental impacts, when DFM is applied to a heavy clay soil.
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Fouty, Suzanne Catherine. « Current and historic stream channel response to changes in cattle and elk grazing pressure and beaver activity ». Thesis, view abstract or download file of text, 2003. http://wwwlib.umi.com/cr/uoregon/fullcit?p3080584.
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Thesis (Ph. D.)--University of Oregon, 2003.Typescript. Includes vita and abstract. Includes bibliographical references (leaves 634-646). Also available for download via the World Wide Web; free to University of Oregon users.
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Franz, Simone, et University of Lethbridge Faculty of Arts and Science. « The effect of cattle grazing in riparian areas on winter biodiversity and ecology ». Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, c2009, 2009. http://hdl.handle.net/10133/2516.
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Livestock grazing in riparian habitats alters the vegetation structure, which has a detrimental effect on wildlife. This study examined the effect of cattle grazing in riparian habitats on winter bird biodiversity, small mammal biodiversity, and microclimate. Study sites were ungrazed, moderately grazed, and heavily grazed riparian habitats along the Oldman River, Alberta during winter 2005 and 2006. Bird species richness, individual abundance, and diversity indices were higher in ungrazed habitats than in grazed habitats. Deer mouse population sizes were not different except during spring 2006, when populations were larger in ungrazed sites. Microclimate data were collected in riparian sites and upland sites in winter 2006. Temperatures were higher and wind speeds were slower in riparian sites than in upland sites. Wind speeds were faster in heavily grazed riparian sites than in lightly grazed sites. Faster winds in heavily grazed sites may account for the decreased winter biodiversity in these habitats.x, 118 leaves ; 29 cm
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Gill, Nicholas Geography & Oceanography Australian Defence Force Academy UNSW. « Outback or at home ? : environment, social change and pastoralism in Central Australia ». Awarded by:University of New South Wales - Australian Defence Force Academy. School of Geography and Oceanography, 2000. http://handle.unsw.edu.au/1959.4/38728.
Texte intégralRésumé :
This thesis examines the responses of non-indigenous pastoralists in Central Australian rangelands to two social movements that profoundly challenge their occupancy, use and management of land. Contemporary environmentalism and Aboriginal land rights have both challenged the status of pastoralists as valued primary producers and bearers of a worthy pioneer heritage. Instead, pastoralists have become associated with land degradation, biodiversity loss, and Aboriginal dispossession. Such pressure has intensified in the 1990s in the wake of the native Title debate, and various conservation campaigns in the arid and semi-arid rangelands. The pressure on pastoralists occur in the context of wider reassessment of the social and economic values or rangelands in which pastoralism is seen as having declined in value compared to ???post-production??? land uses. Reassessments of rangelands in turn are part of the global changes in the status of rural areas, and of the growing flexibility in the very meaning of ???rural???. Through ethnographic fieldwork among largely non-indigenous pastoralists in Central Australia, this thesis investigates the nature and foundations of pastoralists??? responses to these changes and critiques. Through memory, history, labour and experience of land, non-indigenous pastoralists construct a narrative of land, themselves and others in which the presence of pastoralism in Central Australia is naturalised, and Central Australia is narrated as an inherently pastoral landscape. Particular types of environmental knowledge and experience, based in actual environmental events and processes form the foundation for a discourse of pastoral property rights. Pastoralists accommodate environmental concerns, through advocating environmental stewardship. They do this in such a way that Central Australia is maintained as a singularly pastoral landscape, and one in which a European, or ???white???, frame of reference continues to dominate. In this way the domesticated pastoral landscapes of colonialism and nationalism are reproduced. The thesis also examines Aboriginal pastoralism as a distinctive form of pastoralism, which fulfils distinctly Aboriginal land use and cultural aspirations, and undermines the conventional meaning of ???pastoralism??? itself. The thesis ends by suggesting that improved dialogue over rangelands futures depends on greater understanding of the details and complexities of local relationships between groups of people, and between people and land.
Livres sur le sujet "Cattle dip Environmental aspects"
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Haldimann, Urs. Unser täglich Fleisch, so essen wir die Welt kaputt. Zürich : Unionsverlag, 1992.
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Adams, Alto. A Florida Cattle Ranch. Sarasota, Florida : Pineapple Press, Inc., 1998.
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), Sheridan Ranger District (Mont. Upper Ruby cattle & horse allotment management plan : Final environmental impact statement. Sheridan, Mont : U.S. Dept. of Agriculture, Forest Service, Beaverhead National Forest, Sheridan Ranger District, 1992.
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Solís, Daniel Villafuerte. La Cuestión ganadera y la deforestación : Viejos y nuevos problemas en el trópico y Chiapas. Tuxla Gutiérrez, Chiapas, México : Universidad de Ciencias y Artes del Estado de Chiapas, Centro de Estudios Superiores de México-Centroamérica, 1997.
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Rapp, Valerie. Elk, deer, and cattle : The Starkey Project. Sous la direction de Pacific Northwest Research Station (Portland, Or.). Portland, Or : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2006.
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Faminow, Merle D. Cattle, deforestation, and development in the Amazon : An economic, agronomic, and environmental perspective. Wallingford, Oxon, UK : CAB International, 1998.
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Buijsman, E. Een gedetailleerde ammoniakemissiekaart van Nederland. 's-Gravenhage : Ministerie van Volkshuisvesting, Ruimtelijke Ordening en Milieubeheer, 1985.
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Rees, Elaine. Threatened, endangered & sensitive species affected by livestock production : A preliminary survey of data available in the western states. Portland, Or : Audubon Society of Portland, 1993.
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Addison, Andrew M. Economic use of cattle slurry and farm effluent under increasing environmental protection : Report. Maresfield : Nuffield Farming Scholarships Trust, 1993.
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Hall, Frederick C. Emigrant Creek cattle allotment : Lessons from 30 years of photomonitoring. Portland, OR : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2005.
Trouver le texte intégralChapitres de livres sur le sujet "Cattle dip Environmental aspects"
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Roncalli, R. A. « Environmental Aspects of Use of Ivermectin and Abamectin in Livestock : Effects on Cattle Dung Fauna ». Dans Ivermectin and Abamectin, 173–81. New York, NY : Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3626-9_12.
Texte intégral
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Troeger, Sabine. « Just Societal Transformation : Perspectives of Pastoralists in the Lower Omo Valley in Ethiopia ». Dans African Handbook of Climate Change Adaptation, 1–21. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-42091-8_265-1.
Texte intégralRésumé :
AbstractPastoralists’ livelihoods in Africa are highly endangered by adverse forces – the climate change being one among those. Against this background, climate change adaptation is conceptualized as strategic agency in the field of risk-laden livelihood environments, that is, agency in the face of risky options and non-calculable uncertainties.The chapter conceptualizes pastoralists’ livelihoods exposed to a four-fold hierarchy of environmental risks and forces defining the actors’ arena of strategic decision making: From the global scale of ever extending impacts by the climate change imperative, to the national scale of government policies in terms of decentralization, challenging people to govern and define their communal efforts in terms of climate change adaptation, and down to the regional scale, which in the presented case is dominated by a large-scale investment, the Kuraz Sugar Development Project, which again confronts local actors with adverse forces toward villagization and eviction from pasture grounds. Right at the end of this hierarchy and in accordance with discourses on “climate services,” the end-users and local actors, the pastoralists, are confronted with and offered a product that they can input into their decision making: cattle feed from the residues of the irrigated sugar cane. The question remains whether substantive aspects of processes turning into true environmental and social justice in terms of recognition, procedures, and distribution will be paid attention to.
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Troeger, Sabine. « Just Societal Transformation : Perspectives of Pastoralists in the Lower Omo Valley in Ethiopia ». Dans African Handbook of Climate Change Adaptation, 1–21. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-42091-8_265-2.
Texte intégralRésumé :
AbstractPastoralists’ livelihoods in Africa are highly endangered by adverse forces – the climate change being one among those. Against this background, climate change adaptation is conceptualized as strategic agency in the field of risk-laden livelihood environments, that is, agency in the face of risky options and non-calculable uncertainties.The chapter conceptualizes pastoralists’ livelihoods exposed to a four-fold hierarchy of environmental risks and forces defining the actors’ arena of strategic decision making: From the global scale of ever extending impacts by the climate change imperative, to the national scale of government policies in terms of decentralization, challenging people to govern and define their communal efforts in terms of climate change adaptation, and down to the regional scale, which in the presented case is dominated by a large-scale investment, the Kuraz Sugar Development Project, which again confronts local actors with adverse forces toward villagization and eviction from pasture grounds. Right at the end of this hierarchy and in accordance with discourses on “climate services,” the end-users and local actors, the pastoralists, are confronted with and offered a product that they can input into their decision making: cattle feed from the residues of the irrigated sugar cane. The question remains whether substantive aspects of processes turning into true environmental and social justice in terms of recognition, procedures, and distribution will be paid attention to.
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Troeger, Sabine. « Just Societal Transformation : Perspectives of Pastoralists in the Lower Omo Valley in Ethiopia ». Dans African Handbook of Climate Change Adaptation, 2447–67. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_265.
Texte intégralRésumé :
AbstractPastoralists’ livelihoods in Africa are highly endangered by adverse forces – the climate change being one among those. Against this background, climate change adaptation is conceptualized as strategic agency in the field of risk-laden livelihood environments, that is, agency in the face of risky options and non-calculable uncertainties.The chapter conceptualizes pastoralists’ livelihoods exposed to a four-fold hierarchy of environmental risks and forces defining the actors’ arena of strategic decision making: From the global scale of ever extending impacts by the climate change imperative, to the national scale of government policies in terms of decentralization, challenging people to govern and define their communal efforts in terms of climate change adaptation, and down to the regional scale, which in the presented case is dominated by a large-scale investment, the Kuraz Sugar Development Project, which again confronts local actors with adverse forces toward villagization and eviction from pasture grounds. Right at the end of this hierarchy and in accordance with discourses on “climate services,” the end-users and local actors, the pastoralists, are confronted with and offered a product that they can input into their decision making: cattle feed from the residues of the irrigated sugar cane. The question remains whether substantive aspects of processes turning into true environmental and social justice in terms of recognition, procedures, and distribution will be paid attention to.
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Aly, Sharif S., et Sarah M. Depenbrock. « Preventing bacterial diseases in dairy cattle ». Dans Improving dairy herd health Improving, 395–456. Burleigh Dodds Science Publishing, 2021. http://dx.doi.org/10.19103/as.2020.0086.16.
Texte intégralRésumé :
A paradigm shift in the management of bacterial diseases of food animals is needed; a shift from pharmacologic interventions to disease risk identification and mitigation. The interaction between disease and its risk factors follows the disease triangle, a conceptual model that incorporates host, pathogen, and environmental factors as a tool to understand different aspects that influence disease. A sustainable approach to bacterial disease mitigation in production settings includes a comprehensive assessment of host, pathogen, and environmental factors of disease to build a prevention platform for multiple syndromes of bacterial disease in cattle. Using bovine respiratory disease as a model, the current chapter will focus on the state of the art of disease prevention in dairy cattle, and investigations into interactions between the host, environment and pathogen which can provide robust information on which to build a prevention platform for multiple syndromes of bacterial disease in cattle.
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Wamwiri, Florence Njeri, et Joanna Eseri Auma. « Overview of the Vectors and Their Role in Transmission of African Animal Trypanosomiasis ». Dans Advances in Environmental Engineering and Green Technologies, 53–72. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6433-2.ch003.
Texte intégralRésumé :
African animal trypanosomiasis (AAT) is a major constraint to livestock productivity, particularly in cattle and in camels. This chapter covers some general aspects of the arthropod vectors of animal trypanosomiasis, the tsetse flies Glossina spp., and to a lesser extent the biting flies. This chapter covers the classification, morphology, basic biology, and the eco-distribution of tsetse flies. The role of tsetse flies in disease epidemiology has also been reviewed. The elementary biology of these vectors is quite well known and elucidated. However, with advances in molecular and other biological techniques, new insights related to tsetse biology have been obtained. This chapter will revisit these basics and include some updated information emanating from research done in the recent past. The final part of the chapter is devoted to a brief discussion on biting flies, the vectors of T. evansi, which causes camel trypanosomiasis.
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Kadim, Isam Tawfik, Msafiri Mbaga, Ghada Ahmed Ibrahim et Ikhlas Ahmed Nour. « Camel Meat Production, Structure, and Quality ». Dans Handbook of Research on Health and Environmental Benefits of Camel Products, 263–84. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1604-1.ch012.
Texte intégralRésumé :
This chapter aimed to discuss population, meat production, and quality characteristics of camels. Camels are considered environmentally friendly and well adapted to the desert's harsh arid and semiarid environment due to their high movability, adequate fodder demand, and water regulation. Camels are most populous in the East Africa and Middle East. Although approximately 250,000 camels are annually slaughtered in many countries and camels as a producer of meat is becoming much more significant, camel meat market has not yet developed. In 2019, the global camel meat production in Africa was leading with 419,933 tonnes production, followed by Asia (210,000 tonnes) and Europe (179 Tonnes). An important feature that characterizes camelid meat products is the low level of intramuscular and subcutaneous fat compared to red meat sources. Pre- and post-mortem factors should be carefully considered to improve camel meat quality characteristics. According to the health aspects and quality of camel meat, it can be successfully marketed alongside cattle, dear, sheep, and goat.
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Miller-Cushon, Emily, et Jennifer Van Os. « Advances in understanding behavioral needs and improving the welfare of calves and heifers ». Dans Understanding the behaviour and improving the welfare of dairy cattle, 163–98. Burleigh Dodds Science Publishing, 2021. http://dx.doi.org/10.19103/as.2020.0084.10.
Texte intégralRésumé :
Management factors affecting dairy calves have broad impacts on behavioral development and implications for long-term welfare, and research in this area is increasingly focused on understanding the behavioral needs of the calf, to refine management and improve understanding of welfare. In this chapter, we summarize recent research addressing behavioral needs of pre-weaned calves and post-weaned heifers, encompassing aspects of social interactions and feeding, rest and comfort, and opportunities for other behavioral expression. In general, evidence suggests welfare and performance benefits of accommodating more natural behavioral expression, including social contact, higher milk intakes fed via a teat, dietary variety, and space and resources to accommodate preferred activities, such as grooming and play. Throughout these sections, consequences of restricting these behaviors includes development of abnormal oral behaviors. Emerging themes of this area of research include consideration of individual differences and implications and approaches to accommodate broader behavioral expression through increasing environmental complexity.
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De Vries, Albert. « Managing replacement and culling in dairy herds ». Dans Improving dairy herd health Improving, 299–320. Burleigh Dodds Science Publishing, 2021. http://dx.doi.org/10.19103/as.2020.0086.12.
Texte intégralRésumé :
Approximately one third of dairy cows are replaced every year. Replacement of dairy cattle is an important part of the cost of dairy production and an environmental sustainability concern. Primary culling reasons are reduced health and fertility. Reduced welfare often proceeds culling. This chapter focuses on factors that affect replacement and culling in dairy herds with a focus on cows. The act of culling is simple, but the risk factors and economic considerations are complex. The chapter first presents some data on culling risks and reasons, explores more in depth the effects of poor health on culling, and presents aspects of economic decision making regarding culling and replacement decisions.
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Carter, Richard, et Ola Magnell. « Age estimation of wild boar based on molariform mandibular tooth development and its application to seasonality at the Mesolithic site of Ringkloster, Denmark ». Dans Pigs and Humans. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780199207046.003.0020.
Texte intégralRésumé :
Age estimation based on the dentition of animal remains is one of the most important methods used for analysis of the demography of past as well as contemporary animal populations by zooarchaeologists and wild game biologists (Wagenknecht 1967; Silver 1969; Morris 1972; Wilson et al. 1982). By constructing age profiles from faunal remains it is possible to study hunting of wild boar and pig husbandry in past societies (Higham 1967a; Rolett & Chiu 1994; Vigne et al. 2000a; Magnell 2005a). Age estimation can also be used for assessing seasonal occupation of settlements and slaughtering of pigs (Legge & Rowley-Conwy 1988; Rowley-Conwy 1993, 1998; Ervynck 1997). Several contributions to this volume provide good examples of how different aspects of the past relationship between humans and pigs can be understood from estimations of age. Age estimations based on tooth development have several advantages over ageing methods based on tooth eruption and wear. Experiments with undernourished pigs have shown that the tooth development is less affected by environmental factors than tooth eruption (McCance et al. 1961). A problem with age estimation of domestic animals based on tooth eruption is that the ages at eruption are known to vary between different breeds (Habermehl 1961; Silver 1969; Reiland 1978; Bull & Payne 1982). The rate of tooth wear is also variable between, and within, different populations as a result of several factors such as variation in tooth morphology, eruption, coarseness, and abrasives in the diet (Healy & Ludwig 1965; Grant 1978, 1982; Deniz & Payne 1982; Magnell 2005b). However, tooth development seems to vary less between different populations. In cattle, roe deer, and red deer no consistent differences between various breeds/populations or between males and females have been noted in tooth development (Brown et al. 1960: 27; Carter 2001a). An advantage with age estimation based on tooth development is that the method considers several definable stages in the formation of all molariform teeth. Because the method is based on several characteristics in the dentition it is possible to give a very accurate assessment of dental maturity and the age of a specimen.
Actes de conférences sur le sujet "Cattle dip Environmental aspects"
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BRAN, Mariana, Simona Roxana PĂTĂRLĂGEANU, Mihai DINU et Silviu Ionut BEIA. « SUPPORTING A HEALTHY ENVIRONMENT THROUGH LIVESTOCK ». Dans Competitiveness of Agro-Food and Environmental Economy. Editura ASE, 2022. http://dx.doi.org/10.24818/cafee/2019/8/04.
Texte intégralRésumé :
The importance of animal husbandry reaches all aspects (social, economic and environmental) of sustainable development in rural areas. People produce for sale, but also for consumption. At the same time, considering the location of this economic activity and the practice of farm technology, it is necessary to observe certain norms in order to ensure good environmental conditions. Of course, the future points to the mistakes of the past. Today, modern animal technology is coordinated through IT programs, which anticipate not only the production but also the risks. Specialized literature indicates the environmental risks arising from cattle breeding at planetary level: accumulation of methane as a specificity of digestion, but also through accumulated manure. In this sense, however, the bibliographic studies and the statistical analyses are in favour of maintaining the herds of cattle, on condition there is genetic improvement in the nutritional aspect, as well as judicious waste management. These considerations are appreciated by Romanian farmers in the economic activity of cattle breeding, promoting measures to reduce greenhouse gases in this field.
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Lahtinen, R. T., et P. J. T. Jokinen. « Painting of Arc Sprayed Zinc Coatings with Water-Based Paints ». Dans ITSC 2000, sous la direction de Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p1077.
Texte intégralRésumé :
Abstract Hot dip galvanized zinc coatings on steel structures are known to have superior atmospheric corrosion resistance properties compared to painted structures. However, the zinc coating can not be applied by this method on large steel structures. The protection of large steel structures against atmospheric corrosion is traditionally done by painting. The environmental pressure to eliminate solvent based paints has forced the painting contractors to move towards water based paints or completely rethink the coating process. One solution to this problem is to use arc sprayed zinc as the "primer" and water based paints as a sealer and a top coat. The research and field tests conducted and supervised by VTT has produced promising results that are described in the paper. The possibility to apply water based paints directly over the arc sprayed zinc is discussed and results of field and laboratory tests are given. The economic aspects of both water based and traditional paint systems over the arc sprayed zinc are discussed in the paper.
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Widmer, Wilbur, Weiyang Zhou et Karel Grohmann. « Converting Citrus Waste to Ethanol and Other Co-Products ». Dans ASME 2009 Citrus Engineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/cec2009-5502.
Texte intégralRésumé :
Conversion of citrus processing waste (CPW) generated during juice production into value added co-products is an important aspect of the juice industry as it offers a solution to waste disposal issues. Currently the practice of drying citrus waste to produce citrus pulp pellets (CPP) for use as cattle feed is profitable. However, until the recent rise in value, CPP value was marginal and often did not meet production costs. Another concern has been volatile organic emissions during CPP production. Only one third of the residual peel oil present in citrus waste is recovered during CPP production with most being vented to the atmosphere during drying and is a growing environmental concern. Improvements in limonene recovery and development of alternative value added co-products obtained from CPW could add substantial value to the citrus crop. For current CPP production, the energy required to dry CPW is the major cost involved and approximately 25 lb of limonene are obtained per ton of CPP produced. Since limonene is recovered during evaporation/concentration of pressed peel juice using a waste heat evaporator, little additional cost is associated with limonene recovery. The concentrated citrus molasses produced may be added back to the press cake or fermented to make ethanol, but only contains a third of the sugars in CPW that are fermentable by conventional yeast. While utilizing the entire CPW stream for ethanol using hydrolysis and fermentation is more involved, three times the amount of ethanol can be obtained compared to using press liquor alone. Most of the limonene must be removed as it inhibits fermentation. In the process developed 85–95% of the limonene contained in CPW can be removed and recovered by steam stripping. This greatly reduces concerns associated with the release of volatile organic compounds (VOCs) during processing of CPW and the limonene recovered has a value equal or greater than stripping costs. Using a mixture of enzymes and yeast, the CPW is then hydrolyzed and fermented simultaneously to produce ethanol followed by distillation to remove and recover the ethanol. Enzyme costs to hydrolyze and liquefy CPW have been reduced to less than a dollar per gallon of ethanol produced, and the economics for distillation are still being optimized. The distillation residues contain half the solids of raw citrus waste that can still be utilized as a CPP product. Other uses for the residues such as incorporation of the pectic materials into building product and paper additives, and ion exchange materials for wastewater remediation are also in development. Paper published with permission.
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Lonia, B., N. K. Nayar, S. B. Singh et P. L. Bali. « Techno Economic Aspects of Power Generation From Agriwaste in India ». Dans 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-170.
Texte intégralRésumé :
The agricultural operations in India are suffering from a serious problem of shortage of electrical power on one side and economic and effective disposal of agriwaste stuff on the other. India being agriculture based country, 70% of its main income (share in GDP) comes from agriculture sector. Any enhancement of income from this sector is based upon adequate supply of basic inputs in this sector. Regular and adequate power supply is one such input. But, the position of power supply in our country defies both these characteristics. With a major portion of power produced being sent to the industrial and urban consumers, there is a perennial shortage of power in the agriculture sector. Consequently, there is an emergent need to produce more power in order to fulfil the needs of this sector effectively. One way of accomplishing this is setting up captive, preferably rural based, small power generation plants. In these power plants, instead of water-head, diesel oil or coal, we can use agri-residue to produce electricity. One such power plant (1–2 MW capacity) can satisfy the power need of 25 to 40 nearby villages. The agriwaste like rice straw, sugarcane-trash, coir-pith, peanut shells, wheat stalks & straw, cottonseed, stalks and husk, soyabean stalks, maize stalks & cobs, sorghum. Bagasse, wallnut shells, sunflower seeds, shells, hulls and kernels and coconut husk, wastewood and saw dust can be fruitfully utilized in power generation. This stuff is otherwise a waste and liability and consumes a lot of effort on its disposal; in addition to being a fire and health hazard. Agriwaste stuff which at present is available in abundance and prospects of its utilization in producing energy are enormous. This material can be procured at reasonably low rates from the farmers who will thus be benefited economically, apart from being relieved of the responsibility of its disposal. Agri-residue has traditionally been a major source of heat energy in rural areas in India. It is a valuable fuel even in the sub-urban areas. Inspite of rapid increase in the supply of, access lo and use of fossil fuels, agri-residue is likely to continue to play an important role, in the foreseeable future. Therefore, developing and promoting techno-economically-viable technologies to utilize agri-residue efficiently should be a persuit of high priority. Though there is no authentic data available with regard to the exact quantity of agricultural and agro-industrial residues, its rough estimate has been put at about 350 mt per annum. It is also estimated that the total cattle refuse generated is nearly 250 mt per year. Further, nearly 20% of the total land is under forest cover, which produces approximately 50 mt of fuel wood and with associated forest waste of about 5 mt.(1). Taking into account the utilization of even a portion (say 30%) of this agri-residue & agro-industrial waste as well as energy plantation on one million hectare (mha) of wastelands for power generation through bioenergy technologies, a potential of some 18000 MW of power has been estimated. From the foregoing, it is clear that there is an enormous untapped potential for energy generation from agri-residue. What is required is an immediate and urgent intensification of dedicated efforts in this field, with a view to bringing down the unit energy cost and improving efficiency and reliability of agri-waste production, conversion and utilisation, leading to subsequent saving of fossil fuels for other pressing applications. The new initiatives in national energy policy are most urgently needed to accelerate the social and economic development of the rural areas. It demands a substantial increase in production and consumption of energy for productive purposes. Such initiatives are vital for promoting the goals of sustainability. cleaner production and reduction of long-term risks of environmental pollution and consequent adverse climatic changes in future. A much needed significant social, economic and industrial development has yet to take place in large parts of rural India; be it North, West, East or South. It can be well appreciated that a conscious management of agri-residue, which is otherwise a serious liability of the farmer, through its economic conversion into electric power can offer a reasonably viable solution to our developmental needs. This vision will have to be converted into a reality within a decade or so through dedicated and planned R&D work in this area. There is a shimmering promise that the whole process of harvesting, collection, transport and economic processing and utilisation of agri-waste can be made technically and economically more viable in future. Thus, the foregoing paras amply highlight the value of agri-residue as a prospective source of electric power, particularly for supplementing the main grid during the lean supply periods or peak load hours and also for serving the remote areas in the form of stand-alone units giving a boost to decentralised power supply. This approach and option seems to be positive in view of its potential contribution to our economic and social development. No doubt, this initiative needs to be backed and perused rigorously for removing regional imbalances as well as strengthening National economy. This paper reviews the current situation with regards to generation of agriwaste and its prospects of economic conversion into electrical power, technologies presently available for this purpose, and the problems faced in such efforts. It emphasizes the need for an integrated approach to devise ways and means for generating electrical power from agriwaste; keeping in mind the requirements of cleaner production and environmental protection so that the initiative leads to a total solution.
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Hersh, Benjamin, et Amin Mirkouei. « Life Cycle Assessment of Pyrolysis-Derived Biochar From Organic Wastes and Advanced Feedstocks ». Dans ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97896.
Texte intégralRésumé :
Abstract Recent interest in reducing stress on the food-energy-water (FEW) nexus requires the use of renewable, organic products that can subsequently address environmental sustainability concerns, such as mitigating greenhouse gas emissions. Pyrolysis-derived biochar from organic wastes (e.g., nutrient-rich agricultural wastes and leftovers, forest harvest residues, and cattle manure) and advanced feedstocks (e.g., algae) is capable of addressing ever-increasing global FEW concerns. Biochar water-nutrient holding capacity and carbon sequestration are key attributes for improving organic farming and irrigation management. The major challenge to commercialize biochar production from organic wastes is the conversion process. Pyrolysis process is a cost-effective and successful approach in comparison to other conversion technologies (e.g., gasification) due to low energy requirement and capital cost, as well as high process efficiency and biochar quality. To determine the environmental impacts of the biochar production process, an analysis of the material, energy, and emission flows of a small-scale pyrolysis process is conducted for a real case study, using life cycle assessment method with the assistance of available life cycle inventory databases within OpenLCA software. The results demonstrate that this study is able to enhance sustainability aspects across FEW systems by (a) employing a portable refinery to address upstream challenges (i.e., collection, transportation, and preprocessing) of waste-to-biochar life cycle, (b) recycling domestic forest and agricultural residues (e.g., pine wood), (c) producing organic biochar-derived soil conditioners that can improve organic cropping and FEW systems. Ultimately, we conclude by discussing techno-economic and socio-environmental implications of biochar production from organic wastes and advanced feedstocks.
Rapports d'organisations sur le sujet "Cattle dip Environmental aspects"
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Narvaez, Liliana, et Caitlyn Eberle. Technical Report : Southern Madagascar food insecurity. United Nations University - Institute for Environment and Human Security (UNU-EHS), août 2022. http://dx.doi.org/10.53324/jvwr3574.
Texte intégralRésumé :
Southern Madagascar’s worst drought in 40 years had devastating cumulative effects on harvest and livelihoods. On top of this, frequent sandstorms and pest infestations have led to severe stress on vegetation triggering a drastic decline in rice, maize and cassava production. These environmental aspects, combined with a lack of livelihood diversification and ongoing poverty, the presence of cattle raiders and restrictive government decisions, have driven the population of southern Madagascar to acute food insecurity conditions. By December 2021, more than 1.6 million people were estimated to have been suffering high levels of food insecurity. This case is an example of how multiple, complex environmental and social factors can combine to trigger a profound crisis in a territory, where vulnerable groups, such as children under five, tend to be particularly affected. Environmental degradation, together with socioeconomic and political dynamics are leaving vulnerable people even more exposed to food crises with few livelihood options or safety nets to cope with disasters. This technical background report for the 2021/2022 edition of the Interconnected Disaster Risks report analyses the root causes, drivers, impacts and potential solutions for the Southern Madagascar food insecurity through a forensic analysis of academic literature, media articles and expert interviews.