Research@Lincoln

Research@Lincoln is an open access institutional repository collecting the research produced by Lincoln University staff and students. You may also be interested in Data@Lincoln or Lincoln University Living Heritage.

Students wishing to submit a thesis or dissertation should see the Depositing theses and dissertations guide.

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    Adoption of minimum tillage and mid-season drainage in rice production and their impacts on farm and economic performance
    (John Wiley & Sons, 2025) Zheng, H; Ma, Wanglin
    This paper investigates the effects of two greenhouse gas (GHG) mitigation practices—minimum tillage and mid-season drainage—on rice farmers' farm performance (e.g., crop yield and risk) and economic outcomes (e.g., income and vulnerability). Minimum tillage reduces carbon dioxide emissions by preserving soil carbon and lowering machinery energy use, while mid-season drainage reduces methane emissions by interrupting anaerobic conditions in rice paddies. We employ a multinomial endogenous switching regression model to analyse survey data collected from rice farmers in China. The results show that adopting mid-season drainage alone significantly increases rice yield, while adopting minimum tillage—alone or combined with mid-season drainage—reduces yield variance. In addition, adoption of either practice or both, substantially improves yield skewness, raises household income and reduces vulnerability to poverty. The findings highlight that promoting GHG mitigation practices like minimum tillage and mid-season drainage requires emphasising their benefits in reducing production risks and poverty vulnerability, alongside their environmental impact, to encourage broader adoption among farmers.
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    The geopolitical ecology of New Caledonia: Territorial re-ordering, mining, and Indigenous economic development
    (University of Arizona Libraries, 2020-01-01) Batterbury, SPJ; Kowasch, M; Bouard, Severine
    In the French Pacific territory of New Caledonia, conflict and difference between Indigenous Kanak people and European settlers has existed at least since the 1850s. We interrogate the geopolitical ecology of these islands, which is deeply wedded to natural resource extraction, is instrumentalized in political debate, power struggles, conflict, and the mining sector. Territoriality, including changes to political borders and access to land, has promoted the interests of the key actors in shaping the future of the islands. Violence in the 1980s was followed by the Matignon Accords (1988) and three provinces were established (North, South, Loyalty Islands). The South Province is governed by a party loyal to France, and the others are in the hands of the Indigenous Kanak independence movement seeking full decolonization and independence. The strengthened regional autonomy that emerged from the creation of provinces has permitted the Kanak-dominated ones to control certain political competencies as well as to guide economic development much more strongly than in other settler states, notably through a large nickel mining project in the North Province. Provincialization has not diminished ethnic divisions as French interests hoped, as signaled by voting in the close-run but unsuccessful 2018 referendum on independence from France. We explore the ironies of these efforts at territorial re-ordering, which are layered on significant spatial and racial disparities. Re-bordering has enabled resurgence of Kanak power in ways unanticipated by the architects of the Accords, but without a guarantee of eventual success.
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    Informal and non-market operations in activity systems
    (Wageningen University and Research, 2023-02-28) Bouard, Severine; Apithy, Leïla; Guyard, Stephane; Passouant, Michel; Sourisseau, Jean-Michel; Belières, Jean-François
    Measuring informal and non-market activities: a representative survey of Kanak households in the indigenous villages of New Caledonia. In 2011, a survey was conducted to examine the role of agricultural activities (agriculture, breeding, fishing and hunting) in the economies of Kanak households living in such villages in New Caledonia. In total, 1429 domestic groups have been interviewed. The survey focused on the activities performed during 2010 and was representative of the indigenous population at national level as well as in 10 areas within the 3 provinces of New Caledonia. In order to allow people to use them for further analysis, this paper describes the conceptual framework, the nature and the quality of the data. A copy of the data collected is available via the following link: https://dataverse.cirad.fr (doi:10.18167/DVN1/VWWVXU). In order to allow people to use them for further analysis, this paper describes the conceptual framework, the nature and the quality of the data.
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    Fire-fallow agriculture as a sustainable cropping system for maintaining organic carbon in Maré Loyalty Island (New Caledonia, southwest Pacific)
    (Springer Science and Business Media Deutschland GmbH, 2021-10-12) Leopold, A; Drouin, J; Drohnu, E; Kaplan, H; Wamejonengo, J; Bouard, Severine
    The Loyalty Islands are part of the French archipelago of New Caledonia in the Southwest Pacific. In these islands, Gibbsic Ferralsols (Humic) are traditionally used for fire-fallow cultivation (FFC) by the Kanak people, but the planting of perennial orchards has been encouraged over the past two decades. The impacts of this policy on soil organic carbon (SOC) are nevertheless unknown, especially in these clay-free soils in which organic matter is the main contributor to soil fertility. SOC and permanganate oxidizable organic carbon (POXC) were studied in the soils of avocado orchards, FFC, and secondary and native forests. Mean SOC stocks are particularly high, ranging between 71.9 and 194.4 MgC ha‾¹ in an equivalent soil mass of 2000 Mg ha‾¹, but they are significantly impacted by land use. Avocado farming reduced SOC stocks by about 30% compared to forest soils, even if fields were established on secondary forests that had already experienced SOC losses. In contrast, FFC did not impact them. The POXC content decreased as the degree of soil anthropization increased; however, it was less sensitive than SOC in highlighting the impacts of land use. SOC storage can be achieved through changes in agricultural practices in avocado farming, with support for farmers in transitioning from family farming to perennial cultivation and the policy management of secondary forests designed to enhance the recovery of native forests.
  • ItemOpen Access
    A review of renewable energy in New Zealand with emphasis on wind-power utilization
    (Lincoln College : Department of Agricultural Engineering, 1976) Chilcott, R. E.
    Paper presented to the Expert Working Group on the Use of Solar and Wind Energy, United Nations Economic and Social Commission for Asia and the Pacific (ESCAP), Bangkok, 2 - 9 March 1976.
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