Njas-Wageningen Journal of Life Sciences最新文献

{"title":"The role of shade trees in influencing farmers’ adoption of cocoa agroforestry systems: Insight from semi-deciduous rain forest agroecological zone of Ghana","authors":"James S. Kaba,&nbsp;Alexander Otu-Nyanteh,&nbsp;Akwasi A. Abunyewa","doi":"10.1016/j.njas.2020.100332","DOIUrl":"10.1016/j.njas.2020.100332","url":null,"abstract":"<div><p>Farmers growing desire for no shade cocoa system has reiterated the scepticism about the impact of research on farmers’ adoption of cocoa Agroforestry. In this study, we assess farmers’ perception about shade trees and how that influences their adoption of cocoa Agroforestry. Five cocoa growing communities in the Eastern Region of Ghana and 91 cocoa farmers were purposively sampled and interviewed. The result showed that the most desirable shade trees among the farmers were <em>Spathodea campanulata</em>, <em>Terminalia superba</em>, and <em>Terminalia ivorensis</em> while <em>Alstonei boonei</em> was the least desirable. About 87 % of farmers introduced shade trees at different stages of cocoa farm establishment while 13 % of farmers had existing trees at establishment. Farmers with less than 11 years farming experience and those with Senior High education kept the recommended number (15–18) of shade trees ha⁻¹. Most farmers related the importance of shade trees to the good growth of cocoa associated crops (37 %) and as source of fodder (31 %), while higher cocoa yield and low education on the importance of shade trees were major reasons farmers removed shade trees. In conclusion, collaboration between farmers and other stakeholders in the cocoa sector is essential in reversing the growing hunger for no shaded cocoa system. This collaboration must focus on educating farmers on the importance of shade trees, and by providing money and agro-inputs support to farmers as impetus for the adoption of cocoa Agroforestry in Ghana.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100332"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100332","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76996741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimating the location of individual livestock holdings and their populations in two developing countries for use in spatial disease spread models","authors":"Muhammad Usman Zaheer ,&nbsp;Christopher Burdett ,&nbsp;Katie Steneroden ,&nbsp;Shaun Case ,&nbsp;Steve Weber ,&nbsp;Mo Salman ,&nbsp;Sangeeta Rao ,&nbsp;Sheryl Magzamen","doi":"10.1016/j.njas.2020.100334","DOIUrl":"10.1016/j.njas.2020.100334","url":null,"abstract":"<div><p>Infectious diseases of food animals, such as Foot-and-Mouth Disease (FMD), pose severe impacts on animal trade, animal products and subsequently endanger global food security. FMD is endemic in many parts of the world and is associated with substantial economic losses, which require risk assessments, preparedness planning, and evaluation of the effectiveness of mitigation strategies that fit within a country’s sociopolitical and socioeconomic constraints. Spatially-explicit stochastic simulation models (SESS) have become a common tool for estimating the spread and impact of FMD. SESS models incorporate uncertainty in the input and output parameters, heterogeneity in disease processes, and integrate geographic locations and spatial proximity of holdings that affect their relative exposure and transmission risk. An essential input to these models is locational data for holdings of animals and associated animal populations in each holding.</p><p>Several efforts have been made to predict the location and population of livestock holdings or population density at different spatial resolutions. These methods or data cannot be used in developing countries because either the data is too coarse, or the inputs required for the methods are not available in resource-limited countries. As such, there is a need to adapt the practical and reliable existing methods to generate simulated datasets depicting the location and population of individual livestock holdings in developing countries for use in SESS models.</p><p>We generated spatially-resolved simulated datasets for the location and population density of individual livestock holdings in Pakistan and Thailand. Firstly, we microsimulated and downscaled the census data to individual holdings based on statistical distributions. Second, geospatial probability surfaces were created based on a survey of expert veterinarians and empirical holding locations. Third, holdings were randomly placed on the probability surface based on a set of rules. These holdings were assigned population of livestock by joining downscaled data and random holdings. The combined dataset on the location and population of individual livestock holdings was, finally, used to generate the density of holdings.</p><p>To our knowledge, this was the first attempt to estimate the locations and populations of individual livestock holdings in developing countries. These data pave the way for the application of SESS models in developing countries to understand the spread of FMD and evaluate mitigation strategies. The control of such an important animal disease would improve livestock health, improve economic gains for producers, and help alleviate poverty and hunger, which will complement efforts to attain the 2030 Sustainable Development Goals.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100334"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100334","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82444728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of deforestation on collection and domestication of Jernang (Daemonorops spp.) and other NTFPs in southern Sumatra, Indonesia","authors":"Lars Schmidt ,&nbsp;Nayu Nuringdati Widianingsih ,&nbsp;Astrid Plaugaard Kaad ,&nbsp;Ida Theilade","doi":"10.1016/j.njas.2020.100325","DOIUrl":"10.1016/j.njas.2020.100325","url":null,"abstract":"<div><p>Villagers in southern Sumatra collect a number of NTFPs for cash income and subsistence as a supplement to cultivated crops. Deforestation restricts the availability of NTFPs. The aim of the study was, with point of departure in Jernang, to investigate the transition between collection and cultivation of NTFPs. A village survey encompassing 57 households involved in collection, cultivation and/or trade of Jernang in two villages with high NTFP collection was carried out.</p><p>The study revealed that more than 20 species or species groups of NTFPs were collected, albeit many of them only occasionally and by few people. In addition to Jernang, tree legume pods (<em>Parkia</em> and <em>Archidendron</em>) were the most collected products. Collection of most NTFPs was gendered. Jernang was almost entirely collected by men, since it implies trekking in forest and climbing. Albeit Jernang collectors found that both quantity and income from collection had declined, very few considered to abandon collection. A combination of economic incentives, poor regulations, and psycho-cultural motives for collection and connectedness to forest lead to intensive harvest. The harvest was less intense for other reported NTFPs, which was explained by shorter harvest season, non-marketable products, bulkiness and poor storability. To compensate for declining wild resources, villagers had started cultivation of some NTFPs, primarily Jernang and legume trees. For Jernang, shortage of planting material and fear of theft of fruits were seen as the greatest barriers to cultivation. The study showed that decreased availability of wild NTFPs, high prices and lack of replacement species may lead to cultivation. Adoptability was restricted by both technical problems (e.g. propagules), competition with domesticated crops, and cultural habits. The study gives an insight into the process of domestication of NTFPs at the interface between collection and cultivation.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100325"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88173881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Motivational factors influencing farming practices in northern Ghana","authors":"S. Mellon-Bedi ,&nbsp;K. Descheemaeker ,&nbsp;B. Hundie-Kotu ,&nbsp;S. Frimpong ,&nbsp;J.C.J. Groot","doi":"10.1016/j.njas.2020.100326","DOIUrl":"10.1016/j.njas.2020.100326","url":null,"abstract":"<div><p>Socio-economic factors that influence the adoption of management practices and technologies by farmers have received wide attention in the adoption literature, but the effects of socio-psychological farmer features such as perceptions and motivations have been analysed to a lesser extent. Using farm household survey data from three regions in northern Ghana, this study explores farmers’ motivations and perceived adoption impediments for three sustainable intensification practices (SIPs): improved maize varieties, cropping system strategies, and combined SIPs (i.e. improved maize and cropping system strategies), and the effect of motivational factors on decisions to adopt SIPs. First, explorative factor analysis (EFA) was used in identifying factors of motivations and impediments for adoption of SIPs. Then, a multinomial logit model was used to analyze the effect of socio-economic farm characteristics and motivational factors on farmers’ decisions to adopt SIPs. EFA identified three motivational factors: <em>personal satisfaction</em>, <em>eco-diversity</em> and <em>eco-efficiency</em>, which differed in importance between the three regions. Across these regions, higher scores for aspects of <em>personal satisfaction</em> were associated with lower interest in improved maize varieties compared to cropping system strategies, while the opposite was true for <em>eco-efficiency</em> which was related to a stronger preference for improved maize varieties. <em>Uncertainty</em>, <em>absence of social support</em>, and <em>resource constraints</em> were identified as impediment factors. The logit model demonstrated that extension services seemed to support the use of improved maize varieties more than the implementation of cropping system strategies. We conclude that motivational factors significantly influence farmer adoption decisions regarding sustainable intensification practices and should be considered systematically in combination with socio-economic farm features and external drivers to inform on-farm innovation processes and supporting policies.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100326"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100326","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76033269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Forage and maize yields in mixed crop-livestock farming systems","authors":"E.F Mutsamba,&nbsp;I. Nyagumbo,&nbsp;W. Mupangwa","doi":"10.1016/j.njas.2019.100317","DOIUrl":"10.1016/j.njas.2019.100317","url":null,"abstract":"<div><p>In mixed crop-livestock farming systems, smallholder farmers face the challenge of insufficient dry season livestock feed whilst crop production is mainly constrained by poor soil fertility and erratic rains. Conservation agriculture (CA) which is premised on three main principles namely minimal soil disturbance, crop rotations and mulching is being promoted as a potential solution to declining soil productivity. However, farmers implementing CA in mixed crop-livestock systems are conflicted by the use of crop residues either as livestock feed or as mulch under crop production. A study was carried from 2012/13 to 2014/15 season in Murehwa, a sub-humid region of Zimbabwe, to evaluate the effects of maize-legume cropping systems on forage, maize grain yield and gross margins. In this context, forage refers to the plant material/biomass harvested for livestock feeding. The cropping systems involved one conventional tillage practice with continuous sole maize (CT), four CA treatments consisting of continuous sole maize, maize-mucuna intercrop, maize-cowpea intercrop and maize-groundnut/soybean rotations. The experiment was replicated on eight farmers’ fields with each farmer treated as a replicate. Maize-mucuna (4 134 kg ha^-1) and maize-cowpea (3 999 kg ha^-1) intercrop systems significantly increased forage yield compared to CA sole maize (3 646 kg ha^-1) and CT sole maize (3 076 kg ha^-1). Among the rotations, maize-soybean rotation system performed better than the maize-groundnut system with respect to forage yield and maize grain. Intercropping and sole cropping systems however showed no significant maize grain yield difference. The highest and lowest gross margins/ha were obtained from the maize-mucuna intercrop (US$1395) and maize-soybean rotation system (US$507), respectively. The study thus suggests that farmers can grow legumes as intercrops with maize without any loss in maize grain yield. Maize-mucuna intercropping was the best of the tested cropping systems with respect to forage yield and gross margins in mixed crop-livestock systems of Murehwa.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100317"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2019.100317","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84852185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indigenous farming transitions, sociocultural hybridity and sustainability in rural Senegal","authors":"Jean B. Faye","doi":"10.1016/j.njas.2020.100338","DOIUrl":"10.1016/j.njas.2020.100338","url":null,"abstract":"<div><p>For many centuries, the indigenous agricultural and cultural systems of the Serer people of Senegambia ensured soil fertility, crop rotation, tree preservation, mixed farming and herding, yielding one of the highest population densities in the pre-colonial Sahel. In the 20th century, as population grew, soil fertility declined and climate change produced regular droughts, Serer farming systems changed to creatively combine many indigenous techniques with some modern practices. The Serer hybrid farming system that emerged especially after the late 1960s is demonstrably more productive than modern or indigenous techniques practiced in pure form (<span>Faye et al., 2020</span>). Given the productivity of hybrid farming techniques, this article asks: Who adopts them? And under what circumstances? Building on years of participant observation supplemented with a survey of 742 Serer farmers, I tested several competing explanations from neo-liberal, feminist, and cultural ecological approaches to understand why and among whom hybrid farming occurs. Multiple regression analysis shows a strong relationship between cultural syncretism and hybrid farming. Farming techniques are not just a matter of isolated, individual choice, but also work through the social and cultural systems that support agriculture. The more these systems reflect established patterns of mixing cultural elements, borrowing from outside and blending into and transforming Serer tradition, the greater the likelihood that farmers will use hybrid techniques. These findings have implications both for agricultural sustainability and for recognizing the sociocultural embeddedness of seemingly individual choices.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100338"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78708907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dairy farmers’ job satisfaction and the influence of automatic milking systems","authors":"Björn Gunnar Hansen ,&nbsp;Egil Petter Stræte","doi":"10.1016/j.njas.2020.100328","DOIUrl":"10.1016/j.njas.2020.100328","url":null,"abstract":"<div><p>Innovation and implementation of new technology in farming is considered important to meet challenges for agriculture to increase sustainability and improve efficiency in production. Less emphasise has been on how the farmers experience the new technology. This paper responds to this gap and explores how Automatic Milking Systems (AMS) influence farmers’ job satisfaction. The research questions are: Are there differences in the experienced level of job satisfaction between AMS farmers and farmers applying Conventional Milking Systems (CMS)? Which factors determine the level of job satisfaction in dairy farming? Do these factors vary on AMS farms compared to CMS farms? The empirical data is based on a survey to a sample of dairy farmers with AMS and CMS. The results show that the most important factors which influence job satisfaction positively are common for AMS and CMS; Increased income, new cowshed, there is a successor present, farmer wants to continue farming. Contrary, higher education and being a male reduces job satisfaction. Further, the results show that AMS farmers are more satisfied with their working day, their occupational safety and their working environment. Other factors which influence job satisfaction for dairy farmers are; Less paper work, working together, considering technological competence less important, being appreciated, considering economic competence less important, increasing milk quota, loneliness and health worries. However, these factors can to a varying degree be explained from an AMS/CMS perspective, even though they differ between the two technologies.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100328"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100328","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78907775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Care-farming as a catalyst for healthy and sustainable lifestyle choices in those affected by traumatic grief","authors":"Richard Gorman ,&nbsp;Joanne Cacciatore","doi":"10.1016/j.njas.2020.100339","DOIUrl":"10.1016/j.njas.2020.100339","url":null,"abstract":"<div><p>Care-farms are increasingly utilized as a means of providing care, support, and therapy for a wide range of different populations, enabling people to cultivate social, physical, mental, and emotional well-being. This study explores the impacts of a care-farm intervention for traumatically bereaved individuals, a population at high-risk of poor physical and psychological outcomes. The study examines how a care-farming model can enable and encourage participants to cultivate healthy and sustainable lifestyles. Following their participation in a care-farming intervention, bereaved parents, siblings, and spouses described significant pivots toward healthier eating, improved sleep outcomes, and increased physical activity. Our results indicate that care-farming may have potential to influence positive changes to health and health behaviors that last beyond the intervention period.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100339"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100339","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77577714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change resilience and adaption of ethnic minority communities in the upland area in Thừa Thiên-Huế province, Vietnam","authors":"Le Thi Hoa Sen ,&nbsp;Jennifer Bond ,&nbsp;Alexandra Winkels ,&nbsp;Nguyen Hoang Khanh Linh ,&nbsp;Nguyen Tien Dung","doi":"10.1016/j.njas.2020.100324","DOIUrl":"10.1016/j.njas.2020.100324","url":null,"abstract":"<div><p>Changing climate patterns and increases in climate extremes pose new challenges to livelihoods of ethnic communities in the upland area in Thừa Thiên-Huế (TTH) province. Unpredictability and extreme events have had adverse effects on both farming and income of many ethnic minority households who are already more likely to be vulnerable due to socio-economic and cultural marginalization. Promoting household resilience to climate extremes has emerged as a key development priority for those living in this area. Using data from a household survey conducted in two upland districts of TTH province (Nam Đông and A Lưới), this study employed FAO’s resilience framework to measure household climate change resilience of different ethnic groups and a Poison regression model to identify determinants of household adaptation. Results showed that ethnic minority households had relatively low resilience to climate change and variability with the resilience index only 0.428. Due to geographic isolation, agriculture-dependent ethnic minority households in A Lưới were least resilient to climate change. Results suggest that interventions aimed at promoting climate resilience for ethnic minority households should focus on increasing people’s knowledge of climate change and associated impacts and risks; and improving household income, savings and strengthen household asset base. Almost all households in the study areas have adopted adaptation measures, such as adjusting the seasonal calendar for crop production; using local crop varieties; practicing mixed cropping; and mulching. Education level, climate change awareness and risk perception of the household head, household income source and ability to access credit were key elements of households’ choice of adaptation strategies.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100324"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2020.100324","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90496129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of the name “genomics” on emerging attitudes in the Netherlands and Ukraine","authors":"Reginald Boersma,&nbsp;Bart Gremmen","doi":"10.1016/j.njas.2019.100319","DOIUrl":"10.1016/j.njas.2019.100319","url":null,"abstract":"<div><p>Public opinion is important for the success of a plant breeding practice. Currently, the relatively new practice of genomics-accelerated breeding is under development. From initial findings in research on consumer acceptance, it appears that people experience a strong link between genetic manipulation (GM) and genomics-accelerated breeding after hearing the name “genomics,” leading to an unfavourable evaluation of genomics-accelerated breeding. There are indications that when genomics is presented with the purpose of enhancing food production, the negative link with GM is perceived more readily than when it is presented for other purposes. In the current article, we conduct experiments with the purpose of studying the transference of unfavourable attitudes from GM to genomics-accelerated breeding. The main focus is to investigate if this transfer is influenced by the presented purpose of plant breeding, resp. enhancing food or biofuel production. The results show that universally respondents use their attitudes towards GM to evaluate genomics. In a culture where GM is perceived as controversial (Ukraine), more favourable attitudes towards both practices result when presenting GM in relation to biofuel rather than to food.</p></div>","PeriodicalId":49751,"journal":{"name":"Njas-Wageningen Journal of Life Sciences","volume":"92 ","pages":"Article 100319"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.njas.2019.100319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78118096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}