Agricultural extension - generic challenges and the ingredients for solutions

Is agricultural extension in developing countries up to the task of providing the information, ideas, and organization needed to meet food needs? What role should governments play in implementing or facilitating extension services? Roughly 80 percent of the world's extension is publicly funded and delivered by civil servants, providing a range of services to the farming population, commercial producers, and disadvantaged target groups. Budgetary constraints and concerns about performance create pressure to show the payoff on investment in extension and to explore alternatives to publicly providing it. The authors analyze the challenges facing policymakers who must decide what role governments should play in implementing or facilitating extension services. Focusing on developing country experience, they identify generic challenges that make it difficult to organize extension: a) The magnitude of the task. b) Dependence on wider policy and other agency functions. c) Problems in identifying the cause and effect needed to enable accountability and to get political support and funding. d) Liability for public service functions beyond the transfer of agricultural knowledge and information. e) Fiscal sustainability. f) Inadequate interaction with knowledge generators. The authors show how various extension approaches were developed in attempts to overcome the challenges of extension: 1) Improving extension management. 2) Decentralizing. 3) Focusing on single commodities. 4) Providing free-for-service public extension services. 5) Establishing institutional pluralism. 6) Empowering people by using participatory approaches. 7) Using appropriate media. Each of the approaches has weaknesses and strengths, and in their analysis the authors identify the ingredients that show promise. Rural people know when something is relevant and effective. The aspects of agricultural extension services that tend to be inherently low cost and build reciprocal, mutually trusting relationships are those most likely to produce commitment, accountability, political support, fiscal sustainability, and the kinds of effective interaction that generate knowledge.ICT Policy and Strategies,Decentralization,Enterprise Development&Reform,Agricultural Knowledge&Information Systems,Agricultural Research,Environmental Economics&Policies,Health Monitoring&Evaluation,Agricultural Knowledge&Information Systems,ICT Policy and Strategies,Agricultural Research

Indigenous knowledge and its implication for agricultural development and agricultural education: a case study of the Vedic tradition in Nepal

This dissertation is about the meaning and relevance, in today\u27s world, of indigenous knowledge, and particularly the traditional cosmologies and sacred beliefs that underly this knowledge. The case of Vedic knowledge in Nepal is studied to illustrate traditional agriculture within a cosmological framework and to provide an holistic, indigenous perspective on development with emphasis on sustainable, indigenous approaches to agriculture and related sectors in Nepal. Indigenous knowledge is defined from an indigenous perspective and an alternative, emic approach to understanding the role of indigenous knowledge in development and the synthesis of modern and indigenous knowledge systems is proposed. Implications are drawn for agricultural education philosophy in Nepal, and conclusions are reached and recommendations made for the global approach to indigenous knowledge in light of the indigenous perspective

Obesity epidemic has emerged among Nigerians

Background: Data from the WHO shows that the prevalence of overweight and obesity increased by ~20% between 2002 and 2010 in Nigeria. We conducted this study to examine the correlates of this fast growing epidemic. Methods: We conducted a cross-sectional study among a random sample of 1058 adults, who were visitors and staff of a government worksite in Abuja, an urban city in Nigeria. The study participants had varying socio-economic status and a wide range of occupations, including skilled labor and professionals. Log-binomial regression models were used to estimate the multivariable-adjusted associations of potential determinants with the prevalence of overweight and obesity. Result The mean age and body-mass index of the study population were 42 years ± (9.3) and 27 kg/m2 ± (4.8). The overall prevalence of overweight or obesity (body-mass index ≥ 25 kg/m2) was 64% (74% of the women and 57% of the men). For women compared to men, the prevalence ratio (PR) and (95% confidence interval, CI) was 1.24 (95% CI 1.08, 1.43, p = 0.004), for overweight, and 2.54 (95% CI 2.08, 3.10, p = <0.0001), for obesity. Individuals aged 40 – 49 years were more likely to be overweight or obese. The PR for overweight and obesity was 1.45 (95% CI 1.07, 1.97), p for age trend = 0.002 and 8.07(95% CI 3.01, 21.66, p for age trend = <0.0001) for those aged 40 – 49 years, compared with those aged <30 years. Compared with the individuals in the lower socio-economic status, the PR for obesity among those in the middle and high socio-economic statuses, were 1.39 (95% CI 1.13, 1.72) and 1.24 (95% CI 0.97, 1.59) respectively, p for trend = 0.003. Conclusion: About two-thirds of urban, professional, high socio-economic status Nigerian adults are either overweight or obese. The prevalence of overweight and obesity among this population of adult Nigerians, is as high as it is in the United Kingdom. Female gender and older age were independent predictors of overweight and obesity; while middle or high socio-economic status were independently associated with obesity

Does the prescriptive lifestyle of Seventh-Day Adventists provide \u27immunity\u27 from the secular effects of changes in BMI?

Objective: To examine the effect of Seventh-day Adventist (SDA) membership on &lsquo;immunity&rsquo; to the secular effects of changes in BMI.Design: Three independent, cross-sectional, screening surveys conducted by Sydney Adventist Hospital in 1976, 1986 and 1988 and a survey conducted among residents of Melbourne in 2006.Subjects: Two hundred and fifty-two SDA and 464 non-SDA in 1976; 166 SDA and 291 non-SDA in 1986; 120 SDA and 300-non SDA in 1988; and 251 SDA and 294 non-SDA in 2006.Measurements: Height and weight measured by hospital staff in 1976, 1986 and 1988; self-reported by respondents in 2006.Results: The mean BMI of non-SDA men increased between 1986 and 2006 (P &lt; 0&middot;001) but did not change for SDA men or non-SDA women. Despite small increases in SDA women&rsquo;s mean BMI (P = 0&middot;030) between 1988 and 2006, this was no different to that of SDA men and non-SDA women in 2006. The diet and eating patterns of SDA men and women were more &lsquo;prudent&rsquo; than those of non-SDA men and women, including more fruit, vegetables, grains, nuts and legumes, and less alcohol, meat, sweetened drinks and coffee. Many of these factors were found to be predictors of lower BMI.Conclusion: The &lsquo;prudent&rsquo; dietary and lifestyle prescriptions of SDA men appear to have &lsquo;immunised&rsquo; them to the secular effects of changes that occurred among non-SDA men&rsquo;s BMI. The dietary and lifestyle trends of SDA women did not reflect the increase in their BMI observed in 2006.<br /

Occurrence of Chlorinated Volatile Organic Compounds (VOCs) in a Sanitary Sewer System: Implications for Assessing Vapor Intrusion Alternative Pathways

Sewer systems have been recently recognized as potentially important exposure pathways to consider during vapor intrusion assessments; however, this pathway has not been well-characterized and there is need for additional information about the occurrence of volatile organic compounds (VOCs) in sewer systems. This paper reports the results of sewer gas sampling conducted in a sanitary sewer over the years of 2014–2017. Sewer gas samples were collected and analyzed using several different techniques, including TO-15 (grab), TO-17 (passive), Radiello® (passive) and a novel continuous monitoring technique, the Autonomous Rugged Optical Multigas Analyzer (AROMA). The applicability of each of the different approaches used in this study is discussed in the context of investigating sanitary sewers as a vapor intrusion alternative pathway. The data confirmed that trichloroethylene (TCE) concentrations in sewer gas were detected adjacent to and extending hundreds of feet away from a previously defined vapor intrusion area, where TCE was a primary contaminant. TCE concentrations detected in sewer gas ranged from non-detect to 1600 μg/m3. Temporal variability was observed in TCE concentrations over timescales that ranged from minutes to months to years at discrete sampling locations. Spatial variability in sewer gas concentrations was also observed throughout the study area. Temporal and spatial variability may be caused by groundwater contamination sources in the study area, as well as sewer gas transport mechanisms

Disturbances in primary visual processing as a function of healthy aging

For decades, visual entrainment paradigms have been widely used to investigate basic visual processing in healthy individuals and those with neurological disorders. While healthy aging is known to be associated with alterations in visual processing, whether this extends to visual entrainment responses and the precise cortical regions involved is not fully understood. Such knowledge is imperative given the recent surge in interest surrounding the use of flicker stimulation and entrainment in the context of identifying and treating Alzheimer’s disease (AD). In the current study, we examined visual entrainment in eighty healthy aging adults using magnetoencephalography (MEG) and a 15 Hz entrainment paradigm, while controlling for age-related cortical thinning. MEG data were imaged using a time-frequency resolved beamformer and peak voxel time series were extracted to quantify the oscillatory dynamics underlying the processing of the visual flicker stimuli. We found that, as age increased, the mean amplitude of entrainment responses decreased and the latency of these responses increased. However, there was no effect of age on the trial-to-trial consistency in phase (i.e., inter-trial phase locking) nor amplitude (i.e., coefficient of variation) of these visual responses. Importantly, we discovered that the relationship between age and response amplitude was fully mediated by the latency of visual processing. These results indicate that aging is associated with robust changes in the latency and amplitude of visual entrainment responses within regions surrounding the calcarine fissure, which should be considered in studies examining neurological disorders such as AD and other conditions associated with increased age

Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS I. Asteroseismic distances to 12,500 red-giant stars

Gaia EDR3 has provided unprecedented data that generate a lot of interest in the astrophysical community, despite the fact that systematics affect the reported parallaxes at the level of ~ 10 muas. Independent distance measurements are available from asteroseismology of red-giant stars with measurable parallaxes, whose magnitude and colour ranges more closely reflect those of other stars of interest. In this paper, we determine distances to nearly 12,500 red-giant branch and red clump stars observed by Kepler, K2, and TESS. This is done via a grid-based modelling method, where global asteroseismic observables, constraints on the photospheric chemical composition, and on the unreddened photometry are used as observational inputs. This large catalogue of asteroseismic distances allows us to provide a first comparison with Gaia EDR3 parallaxes. Offset values estimated with asteroseismology show no clear trend with ecliptic latitude or magnitude, and the trend whereby they increase (in absolute terms) as we move towards redder colours is dominated by the brightest stars. The correction model proposed by Lindegren et al. (2021) is not suitable for all the fields considered in this study. We find a good agreement between asteroseismic results and model predictions of the red clump magnitude. We discuss possible trends with the Gaia scan law statistics, and show that two magnitude regimes exist where either asteroseismology or Gaia provides the best precision in parallax.Comment: 11 pages, 8 figures, Accepted for publication in A&

Must . . . stay . . . strong!

This is the fourth installment in our trilogy of papers on epistemic modality.It is a recurring matra that epistemic must creates a statement that is weaker than the corresponding flat-footed assertion: It must be raining vs. It’s raining. Contrary to classic discussions of the phenomenon such as by Karttunen, Kratzer, and Veltman, we argue that instead of having a weak semantics, must presupposes the presence of an indirect inference or deduction rather than of a direct observation. This is independent of the strength of the claim being made. Epistemic must is therefore quite similar to evidential markers of indirect evidence known from languages with rich evidential systems. We work towards a formalization of the evidential component, relying on a structured model of information states (analogous to some models used in the belief dynamics literature). We explain why in many contexts, one can perceive a lack of confidence on the part of the speaker who uses must