Intensified sweetpotato production in Papua New Guinea drives plant nutrient decline over the last decade

Fujinuma, Ryosuke; Kirchhof, G.; Ramakrishna, Akkinapally; Sirabis, William; Jeffery, Yapo; Woruba, Deane N; Gurr, Geoff M.; Menzies, Neal W.

doi:10.1016/j.agee.2017.11.012

Cited by 11 publications

(8 citation statements)

References 25 publications

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“…Poor soil health likely stems from decreased fallowing opportunities and a lack of nutrientrich soil amendments. Similar observations in declining soil health have been made in the Melanesian Highlands of Papua New Guinea (Fujinuma et al, 2018).…”

Section: Food System Outlookssupporting

confidence: 78%

Dietary agrobiodiversity for improved nutrition and health outcomes within a transitioning indigenous Solomon Island food system

et al. 2021

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Indigenous food systems of Pacific Small Island Developing Countries contain vast biological and cultural diversity. However, a nutrition transition is underway, characterized by shifts away from traditional diets in favour of imported and modern foods, contributing to some of the highest rates of obesity and Diabetes Type 2 Mellitus in the world. Using a mixed method approach, this study aimed to assess dietary agrobiodiversity’s relationship with nutrition indicators related to diet quality and anthropometrics within the context of the rural and Indigenous food system of Baniata village, located in the Western Province of Solomon Islands (Melanesia). A secondary aim was to evaluate the contribution of agrobiodiversity from the local food system to diet quality. A comprehensive nutrition survey was administered to the women primarily responsible for cooking of randomly selected households (n = 30). Additionally, 14 participatory focus group discussions captured the historical narrative of food system transitions, were hosted over a period of seven days, and included men, women and youth. Dietary intakes of the participants were reported below the estimated average requirement (EAR) for several essential nutrients, including protein (53%), calcium (96.6%), vitamin B1 (86.6%), vitamin B2 (80%), vitamin A (80%), zinc (40%) and fibre (77%). Focus group participants built a timeline of key historical and climatic transitions perceived to be drivers of dietary shifts away from traditional foods and towards imported and processed foods. Participants identified 221 species and varieties of agrobiodiverse foods available for cultivation or wild collection. Based on 24 h diet recalls, 87 were found to be utilised. Participants who consumed foods of a wider diversity of species richness had a higher probability of achieving recommended nutrition intakes and a lower body fat percentage (r2 = 0.205; p = 0.012). Our results suggest a nutrition transition is underway, and strategies harnessing traditional knowledge of nutrient-dense, agrobiodiverse foods can help improve food and nutrition security.

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Section: Food System Outlookssupporting

confidence: 78%

Dietary agrobiodiversity for improved nutrition and health outcomes within a transitioning indigenous Solomon Island food system

et al. 2021

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“…Sweet potato is the seventh most important food crop in the world (Flores et al 2016) and even it becomes a staple food in some areas of Asian countries, e.g. PNG (Fujinuma et al 2018). In addition, sweet potato is one of the main sources of starch, sugar, alcohol, flour and other industrial products (Lee et al 2006;Adenuga 2010).…”

Section: Introductionmentioning

confidence: 99%

Soil Potassium Nutrient, Temperature and Rainfall Required to Generate ‘Honey Taste’ of Cilembu Sweet Potato

Anda¹,

Suryani²,

Widaningrum³

et al. 2018

Indones. J. Agric. Sci.

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<p>Indonesia produces normal and “honey taste sweet potatoes” (HTSP), but soil properties and climate factors that govern the unique honey taste and its sugar content have not yet comprehensively evaluated. The objective of the study was to assess and evaluate the soil nutrients and climate factors generating honey taste of Cilembu Rancing cultivar. Soils and plant tissues were sampled at different elevations for various macro- and micro-nutrient analyses and that tubers for sugar analysis. Results showed that the most suitable climate to produce the highest vine and tuber weight, and total tuber sugar of the HTSP was monthly temperature of 21–22oC occurring at 870–917 m soil elevation with monthly rainfall of 96-199 mm. The K nutrient was responsible in part to the high production and total sugar as revealed by significantly positive correlation between soil available K against K content of leaves and tubers, fresh weight of vines and tubers, and total sugar of tubers. The honey taste was driven by type of dominant sugar: fructose > sucrose > glucose. The balance of N, P, K, Ca and Mg to support generation of HTSP for Rancing cultivar was 2,067, 25, 304, 1,824 and 260 mg kg-1 soil, respectively. Further, the content of Fe, Mn, Cu and Zn micronutrient was 29, 177, 4 and 2 mg kg-1, respectively. Findings of climate factors and soil nutrients required by HTSP in this study could be used as a guidance to select the new areas for massive development of honey-taste sweet potato.</p>

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“…Larger-scale production has expanded in some areas, particularly near Mt. Hagen and Goroka (Chang et al, 2014;Fujinuma et al, 2018), and these more commercial producers are best placed to benefit, but environmental and social limits constrain this option for some people. Producers with poorer access to land, including rural migrants with insecure access, and those unable to secure additional labour will find it more difficult to increase production-of course, some may become resellers themselves.…”

Section: Beyond the Marketplace: Changes In Rural-urban And Gender Relationsmentioning

confidence: 99%

Intermediary trading and the transformation of marketplaces in Papua New Guinea

Sharp

2021

Journal of Agrarian Change

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Trade in marketplaces is central to the domestic distribution of food and other goods throughout the developing world. The commodity networks involved are often complex with numerous intermediate transactions between producer and consumer. By contrast, in the Pacific nation of Papua New Guinea (PNG), marketplace trade has historically occurred through very short commodity networks. This article examines the appearance and growing significance of intermediary trading in PNG's marketplaces and associated trade networks. Reselling is supporting urban livelihoods at a time when making a living in town is increasingly precarious, but the transformation of marketplaces, I argue, also threatens to reduce the agency of rural producers and erode the incomes of certain producers. Growing intermediation may also see men increasingly involved in an economic domain where women have been central. The emergence of intermediaries is globally an important historical development, and this article provides a rare study of this process within the contemporary era. K E Y W O R D S commodity networks, intermediaries and middlemen, marketplace, Papua New Guinea, rural-urban relations, trade 1 | INTRODUCTION Trade in marketplaces is central to the domestic distribution of food and other goods throughout the developing world. The commodity networks involved are often complex with numerous intermediate transactions between producer and consumer. By contrast, in the independent Pacific nation of Papua New Guinea

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Intensified sweetpotato production in Papua New Guinea drives plant nutrient decline over the last decade

Cited by 11 publications

References 25 publications

Dietary agrobiodiversity for improved nutrition and health outcomes within a transitioning indigenous Solomon Island food system

Dietary agrobiodiversity for improved nutrition and health outcomes within a transitioning indigenous Solomon Island food system

Soil Potassium Nutrient, Temperature and Rainfall Required to Generate ‘Honey Taste’ of Cilembu Sweet Potato

Intermediary trading and the transformation of marketplaces in Papua New Guinea

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