Plantation Development Research Articles

Insights into the dwarfing mechanism of pear (Pyrus betulaefolia) based on anatomical and structural analysis using X-ray scanning

The lack of a suitable rootstock to control scion growth has limited the development of high-density plantations in pear production, which is partly attributed to poor understanding of the dwarfing mechanism. In the present study, the rootstock of the dwarf-type pear (Pyrus betulaefolia) ‘PY-9’ was identified and used as the material for anatomical analysis. ‘PY-9’ grew to half the tree height of the normal cultivar ‘Zhengdu’, along with fewer internodes and shorter length. Significant differences in growth rate between ‘PY-9’ and ‘Zhengdu’ were detected at approximately 30 days after full bloom, which corresponded with the time of the greatest difference in water potential between the dwarf and normal cultivar. ‘PY-9’ showed a higher photosynthetic rate than ‘Zhengdu’. Anatomical analysis showed that ‘PY-9’ had higher area ratios of both phloem and xylem and more developed vascular tissues than ‘Zhengdu’. The three-dimensional reconstructed skeleton of the xylem from X-ray computed tomography scanning revealed greater intervessel connectivity in ‘Zhengdu’ than in ‘PY-9’, which could contribute to the more vigorous growth of ‘Zhengdu’. This study thus provides the first comparison of the microstructural properties of xylem elements between a dwarfing-type and vigorous-type pear rootstock, providing new insights into the dwarfing mechanism in pear and facilitating breeding of dwarf pear rootstocks to increase crop productivity.

Powers of exclusion: A case study of state-led large scale rubber development in Vietnam’s north-western region

ABSTRACT Cash crop development has been instrumental for economic growth in many countries. However, this intervention has negatively affected many local communities. The global rubber boom in the early 2000s prompted the state-owned Vietnam Rubber Group (VRG) to scramble for land to expand their rubber plantations. This paper examines the mechanisms and processes associated with state-led large scale rubber development in Vietnam’s north-western region. The development of large-scale rubber plantation in the region was established on villager’s devolved crop lands. Using the powers of exclusion framework developed by Hall et al. (2011), the paper asks how government regulations, legitimation and force are used to enroll villager’s land into rubber development. Particularly, I unearth how these powers were used to force villagers to engage in contract farming – dubbed as a ‘joint venture’ by VRG. In addition, I examine how government and VRG continued to use these powers to stamp out local resistance and retain land. The unfolding contestation has important implications for state-society relations.

The Impact of Small-Scale Oil Palm Plantation Development on the Economy Multiplier Effect and Rural Communities Welfare

The Impact of Small-Scale Oil Palm Plantation Development on the Economy Multiplier Effect and Rural Communities Welfare

Insights into the Distribution of Soil Organic Carbon in the Maoershan Mountains, Guangxi Province, China: The Role of Environmental Factors

The forest ecosystem is the largest carbon reservoir in the terrestrial ecosystem, with soil organic carbon (SOC) being its most important component. How does the distribution of forest SOC distribution change under the influence of regional location, forest succession, human activities, and soil depth? It is the basis for understanding and evaluating the value of forest SOC reservoirs and improving the function of forest soil carbon sinks. In this paper, soil organic carbon concentrations (SOCCs) and environmental factors were measured by setting 14 experimental plots and 42 soil sampling sites in different forest communities and different elevations in the Maoershan Mountains. The redundancy analysis (RDA) method was used to study the relationship between SOC distribution and external factors. The results show that SOC distribution was sensitive to elevation, forest community, and soil layer. It had obvious surface aggregation characteristics and increased significantly with the increase in elevation. Among them, SOCCs increase by 1.80 g/kg with every 100 m increase in elevation, and that decreased by 5.43 g/kg with every 10 cm increase in soil depth. The SOC distribution in natural forests is greater than that in plantations, and the spatial variation in SOC distribution in plantations is higher due to the effect of cutting and utilization. SOC distribution is the result of many environmental factors. The response of SOC distribution to the forest community indicates that the development of plantations into natural forests will increase SOC, and excessive interference with forests will aggravate SOC emissions. Therefore, strengthening the protection of natural forests, restoring secondary forests, and implementing scientific and reasonable plantation management are important measures for improving the SOC reservoir’s function.

Leaf litter chemistry and its effects on soil microorganisms in different ages of Zanthoxylum planispinum var. Dintanensis

BackgroundLeaf litter is the products of metabolism during the growth and development of plantation, and it is also an important component of nutrient cycling in plantation ecosystems. However, leaf litter chemistry and its effects on soil microorganisms in different ages, as well as the interactions between chemical components in leaf litter have been rarely reported. Based on this, this paper took Zanthoxylum planispinum var. dintanensis (hereafter Z. planispinum) plantations of 5–7, 10–12, 20–22, and 28–32 years old as the objects. By using one-way ANOVA, Pearson correlation analysis and redundancy analysis, we investigated leaf litter chemistry and its effects on soil microorganisms in different ages, and to reveal internal correlation of various chemical components in leaf litter, which can provide a scientific basis for the regulation of soil microbial activity in plantations.ResultsThe variation of organic carbon with plantation age was more stable compared to total nitrogen and phosphorus of leaf litter. Nitrogen resorption was stronger than phosphorus resorption efficiency in Z. planispinum, and resorption efficiencies of leaf nitrogen and phosphorus for different ages were lower than the global average. Total nitrogen was highly significantly positively correlated with lignin, and total potassium was significantly positively correlated with tannin, suggesting the increase of inorganic substances in leaf litter would promote the accumulation of secondary metabolites. The leaf litter chemical traits explained up to 72% of soil microorganisms, where lignin was positively correlated with fungi and negatively correlated with bacteria, indicating that fungi are able to decompose lower quality litter and can break down complex and stable organic compounds more rapidly than bacteria. The nutrient elements carbon and nitrogen in the leaf litter and their interrelationship also have a great impact on soil microorganisms, because carbon is not only the element that provides energy, but also the element with the largest content in the microbiota.ConclusionsThe sustained increase in inorganic nutrients of leaf litter did not favor the decomposition of secondary metabolites, but rather inhibited the degradation of leaf litter. The significant positive effect of the leaf litter chemistry on soil microorganisms indicates the important role of leaf litter in promoting nutrient cycling in Z. planispinum plantations.

Regional Development, Rural Transformation, and Land Use/Cover Changes in a Fast-Growing Oil Palm Region: The Case of Jambi Province, Indonesia

The development policies implemented in Jambi Province, Indonesia, since the New Order era, have encouraged transformations in demography, regional paradigms, growth base sectors, and growth actors. This study aims to understand how the central government’s demographic policies and plantation development program have impacted regional land cover change, rural development transformation, and economic development in Sumatra Island’s biodiversity-rich rainforest region (Jambi Province). This study explores the shifts in village typology that have occurred. Descriptive analysis and cluster analysis were applied to collect data at the provincial level that included population, poverty rate, levels of education, HDI, GRDP, Gini index, and land cover. Village Potential Data at the village level was then used to build an infrastructure index and a diversity of activities index. The results of this study indicated that macro development indicators are in a positive trend: HDI, educational levels, GRDP per capita, and the proportion of the tertiary sector in GRDP have all increased. The growth of the tertiary sector was largely driven by the trade and motorized-vehicle repair sectors. The provincial landscape has changed significantly due to the expansion of oil palm plantations. At the village level, the infrastructure index and diversity index show an increase in the number of facilities and variations in economic activity in most villages. Some shifts in rural typology are highlighted: the increase in urban villages and in villages that specialize in oil palm plantation or other industrial plantation crops.

Methodological approaches to biotechnological process management in the protection of perennial fruit plantations (codling moth as an example) based on digital technologies

In this work, we investigate the harmful effect of codling moth in industrial fruit plantations of Krasnodar Krai. An analysis of growing expenditures on protective measures is carried out in connection with the high dynamics of macroeconomic processes and sanction measures. A correlation between the distribution of codling moth and the magnitude of climate change is noted. The need to increase the efficiency of measures aimed at the development and implementation of plantation and crop protection is highlighted. According to long-term research studies into the bioecological features of the phytophage development during vegetation, its following adaptation features are established: high adaptivity to variable weather conditions; high potential of pest resurgence during one vegetation period; changes in the pest phenology; an increase in the overall number of pests in those sections of the orchard where trees grow for 15–16 years and more. A scheme for the automated control of monitoring processes, optimum regime selection, application of biorational systems of efficiency control based on digital technologies is proposed. The technology for managing biotechnological processes of fruit plantation protection is described in terms of functional components, including the formation of a system of ecological and economic parameters of implementing insecticides against harmful pests; development of multivariant models and adaptive instruments of phytosanitary stability management of apple-tree agrocenoses based on the criteria of biologicalization, ecologization, and rational nature management; monitoring of the number of pest populations; phytosanitary stability of apple-tree plantations; regulations for effective and safe use of biorational, low-toxic chemical and biological preparations of new generation in apple-tree plantations; evaluation of the action of the studied preparations on non-target organisms. The latter include fruit analysis for the presence of residual amounts of background and impact pesticides, determination of phytotoxic effects of used preparations on the protected plants, evaluation of the studied preparations action on associated pests. A comparative study of available technologies for crop protection against codling moth is carried out. The efficiency of biological methods in the field of crop protection is substantiated.

A GIS-BASED SUSTAINABILITY AND HIGHEST-BEST USE (SHBU) FOR FELDA LANDS DEVELOPMENT PLANNING DECISION-MAKING

FELDA is enforcing a new direction of sustainable FELDA development in the future. It has timely developed a Sustainability and Highest and Best-use (SHBU) framework based on a GIS-based Multicriteria Decision Analysis (MCDA) approach for optimising FELDA lands, particularly crops, and other possible developments. This paper attempts to demonstrate the application of the GIS-based SHBU for FELDA Bukit Rokan discovering its capabilities. It includes generating criterion maps and sub-criterion maps, weighting criterion maps, and creating outcomes – composite maps of cropland suitability and future-physical development. The geospatial analyses for a Bukit Rokan confirmed that the SHBU model could provide the needed information for crop and settlement area developments. The production of the composite crop and physical land development maps significantly helps FELDA management or crop plantation planners optimise lands for crop plantation and future physical development. Hence, its application provides valuable information about the areas and support attributes enhancing FELDA lands development planning decision-making.

Phenology and South American leaf blight of polyclonal seedlings population of natural rubber trees in Colombia

The phenological development of polyclonal rubber plantations has been little explored, although they present adaptive potential to specific biotic and abiotic conditions. Between 2016 and 2021, rubber tree seedlings were evaluated for leaf ontogeny, leaf area index (LAI), and reproductive phenology (flowers and fruits). The climatic conditions were correlated with the foliar and reproductive rubber phenology and the incidence and severity of the South American leaf blight (SALB). The tree phenology showed a relationship between defoliation-refoliation with the water deficit intensity and high temperatures. The development of the trees in a polyclonal plantation was heterogeneous, and the defoliation-refoliation phases were extended over time. A higher SALB severity was associated with higher relative humidity and radiation periods, reducing the leaf area (atypical defoliation) and changing flowering and fruiting seasonality. The intensity and duration of climatic factors, particularly water deficit, are important for determining phenological processes and fungal diseases such as SALB, which serves as a tool to build management strategies both in seed production and obtaining latex in scenarios of climate change.

Mixed-species plantations alleviate deep soil water depletion and facilitate hydrological niche partitioning compared to pure plantations

Understanding the effects of different silvicultural patterns on soil water reservoirs and how silvicultural species adjust their water use strategies and plant function traits is critical to guiding future silvicultural activities toward the sustainable development of plantations. We continuously monitored soil gravimetric water content (SWC), soil and plant isotopes, leaf water potentials at predawn and midday (Ψpd and Ψmd), and plant morphological traits in pure Populus simonii tree plantations (PPs), pure Amorpha fruticose shrub plantations (PAf), and mixed P. simonii-A. fruticose plantations (Msf) during the 2021 growing season. The study showed that the average SWC of the deep layer (80–200 cm) was Msf > PAf > PPs. P. simonii in the Msf increased the water use proportion of the deep layer compared to that in the PPs, especially during the vigorous growth period of June-July, and shifted the major water use from shallow (0–40 cm) to deep layers on average. A. fruticose mainly used shallow soil water during the growing season. The leaf-level water use efficiency of the same species did not change in the Msf compared to that in the PPs or PAf. Based on the slope (σ) of the linear equation of Ψpd-Ψmd, P. simonii and A. fruticose exhibited isohydric (σ < 1) and an-isohydric (σ > 1) behavior under varying soil water conditions, respectively. The wood density was higher and specific leaf area (SLA) was lower in the PPs than in the Msf for P. simonii, while the ratio of stem sapwood area to leaf area was higher and SLA was lower in the PAf than in the Msf for A. fruticose. These findings reflected that mixed tree-shrub plantations alleviate deep soil water depletion compared to pure plantations, facilitate hydrological niche segmentation of co-occurring species, and reduce carbon investment in xylem and leaves to resist water stress and possibly devote more resources to growth.

Review Literatur: DINAMIKA PENGEMBANGAN PERKEBUNAN SAGU BERKELANJUTAN BERBASIS KEARIFAN LOKAL

Sago is a native Indonesian plant that has the potential to be developed as a food and non-food source because it has several advantages, namely high starch content, resistance to climate change, being able to grow and adapt to marginal environments. Sustainability of sago plantation management must meet environmental, economic, social and institutional aspects. The purpose of this study is to identify the dynamics in the development of sago plantations and forms of local wisdom that can support the development of sustainable sago plantations. The research method used is a qualitative approach with Systematic Literature Review (SLR). The results of article review show that the development of sago plantations faces constraints of low productivity and unsustainability from social, economic, environmental culture and institutional aspects. Meanwhile in the community there are local wisdom sago management practices that have a positive effect on the five aspects of sustainability. However, previous study is still partial and does not focus on the sago plantation sector. Research questions about how to develop sustainable sago plantations based on comprehensive local wisdom is the novelty that are offered to be answered in future research.

Aspects of soil fertility and nutrition of Pinus taeda L: A review

The cultivation of the genus Pinus spp. in Brazil occupies an area of 1.7 million hectares in 2020. Pinus is considered a socioeconomic component, which helps maintain the development of the southern region of the country and the national supply chain. However, the areas destined for pine cultivation usually have acidic soils and low natural fertility, which reduces the nutrients availability, negatively influencing the crop development. However, it is not known if Pinus responds positively to mineral fertilization, nor what is the nutrient of greatest demand regarding plantation development. Thus, the objective of this review is to explore which nutrients are of greatest nutrient need and therefore most responsive to pine growth and productivity. Thus, this review aims to establish a discussion on the importance and current plantation of Pinus taeda, along with answers on fertilization and nutrition of the crop, obtaining data from articles found in scientific databases of international literature, to better inform fertilization practices for this little studied crop. We have seen that mineral fertilization aims to optimize the pine growth, seeking to meet the physiological needs of the plants and thus achieve maximum crop productivity. However, the literature shows that many times the pine does not respond expressively in growth when subjected to mineral fertilization. Thus, studies that consider the effects of nutrient application to the pine crop, over time, are required to better conclude whether the pine crop responds to the nutrient supply.

The role of healthy citrus planting materials production as a major component in the development of national citrus industry

Certified citrus seed is one of vital component on the program of good agricultural practices for the development of healthy citrus plantation. Certified seed guarantee the free systemic disease and optimum vigor planting material, thus put an impact on maximum physiological response to the agriculture inputs that being applied. Production of healthy planting material is initially started from the acquisition of free diseases protocol of seeds from breeder seeds. However, there are still many issues regarding bud-stick in Indonesia which cause the spread of systemic diseases, one of which is CVPD/Huanglongbing (HLB). Therefore, this article presents a descriptive review of the important role of healthy citrus planting materials production that meets the requirements, so that it can become a reference for the citrus nurseries. There are several factors (limited availability of citrus planting materials, technology components to produce healthy seedlings that are not fully applied, as well as the partial application of certified citrus planting materials) that could inhibit the use of technology by the citrus nurseries. A number of recommendations from literatures to overcome these problems are the use of effective dissemination and extension methods, also the provision of understanding and supervision that is carried out on an ongoing basis.

Carceral Frontiers: Prison Labour and the Making of New Zealand’s Pacific

Framed by an understanding that prisons and their work regimes mobilise as much as they confine, this paper highlights the importance of prison labour in the making of commodity and carceral frontiers in New Zealand’s Pacific empire between the 1890s and 1920s. Prison labour in the Cook Islands, Niue and Sāmoa not only appropriated “cheap nature” for the colonising work of “improvement” – roads, public works, plantation development, guano extraction and commodity production – but helped reproduce the logic of capitalist accumulation, gendered divisions of labour and the authority of the colonial nation-state. Rather than a peripheral phenomenon, prison labour operated alongside free and indentured labour and was a crucial element in shaping imperial authority and work regimes in New Zealand’s Pacific empire.

Nitrogen and phosphorous dynamics with stand development of Pinus massoniana plantations in Southeast China.

Nutrient resorption is a key mechanism to conserve nutrients and overcome nutrient limitation in perennial plants. As an important afforested tree species in subtropical regions, Pinus massoniana grows well in nutrient-poor environments, however, the age-related pattern of nutrient acquisition strategy and the underlying mechanisms in P. massoniana plantations remain unclear. In this study, concentrations of nitrogen (N) and phosphorus (P) were measured in green and senesced needles, roots and soil samples collected from P. massoniana plantations with different stand ages (9-, 17-, 26-, 34- and 43-year-old) in south China. From these samples, nutrient resorption efficiency (RE) and stoichiometry were calculated. Needle PRE significantly decreased with stand age, while there was no clear pattern of NRE along the stand development. Green needle N:P in older stands was significantly lower than in younger ones. Senesced needle C:P and N:P significantly decreased with stand age. Root and soil available P concentrations were significantly higher in older stands than in younger ones, and PRE was negatively correlated with soil available P concentration. There was a shift from "conservative consumption" to "resource spending" P-use strategy, and P limitation decreased with stand development of P. massoniana plantations. The results provide information of changes in nutrients dynamics, which is relevant for the sustainable management of subtropical forest plantations.

Patterns of Needle Nutrient Resorption and Ecological Stoichiometry Homeostasis along a Chronosequence of Pinus massoniana Plantations

Nutrient resorption and stoichiometry ratios are vital indicators to explore nutrient transfer and use efficiency for plants, particularly under the condition of nutrient limitation. However, the changing rules about nutrient resorption and ecological stoichiometry homeostasis are still unclear with the development of plantations. We determined carbon (C), nitrogen (N), and phosphorus (P) concentrations in soil and in fresh and senesced needles along a chronosequence of Pinus massoniana plantations (10, 20, 30, and 36 years old) in Guizhou Province, China. We also calculated the N and P resorption efficiency (NRE and PRE, respectively) and the homeostasis coefficient. The results showed that fresh and senesced needles’ C and N concentrations maintained an increasing trend, whereas their P concentrations decreased initially and subsequently increased as the plantations’ ages increased. Fresh needles’ N:P ratios indicated that N limitation existed before 20 years old, while P limitation appeared in the 30-year-old plantations. The NRE and PRE showed patterns of increasing initially and decreasing subsequently along the chronosequence of P. massoniana plantations, which was coupled with weak stoichiometric homeostasis to reduce nutrient deficiency. Therefore, the appropriate nutrient management measurements should be induced to promote tree growth and the sustainable development of P. massoniana plantations.

Shifts in soil nitrogen availability and associated microbial drivers during stand development of Mongolian pine plantations

AbstractAfforestation on degraded lands is an effective measure to control desertification and soil erosion, but these functions are often constrained by soil nitrogen (N) availability. Moreover, soil N availability usually shifts along plantation development, yet we have a limited understanding of factors driving this shift. Here, we examined dynamics of soil N mineralization and nitrification rates along plantation development, and explored mechanisms behind these dynamics from the perspective of N‐cycling microbes. We measured needle litter quality, N‐hydrolyzing enzyme activity, biomass and community composition of soil microbes (phospholipid fatty acid analysis) and ammonia oxidizers (real‐time quantitative PCR and high‐throughput sequencing), and net N mineralization and nitrification rates along a chronosequence of Pinus sylvestris var. mongolica stands with six age classes ranging from 15‐ to 61‐year‐old in the Three‐North region of China. Results showed that stand development increased net N mineralization rate by 54%, nitrate‐N concentration by 106%, and nitrate‐N:ammonium‐N ratio from 1.09 to 2.63. Gram‐positive:gram‐negative bacterial ratio and β‐N‐acetylglucosaminidase activity initially increased and subsequently decreased along stand development with the highest values in 40‐year‐old stands, while fungal:bacterial ratio showed the opposite pattern with the lowest value in 40‐year‐old stands. These shifts in soil microbial properties were associated with age‐related changes in needle litter C:N ratio and soil pH. Net N mineralization rate was positively related to β‐N‐acetylglucosaminidase activities, but not to soil microbial biomass and community composition. Net nitrification rate was negatively correlated with ammonia‐oxidizing archaeal abundances and positively with ammonia‐oxidizing bacterial abundances. Collectively, our results indicate that soil N availability increases and N cycling accelerates with plantation growth, and suggest that microbial N recycling driven by β‐N‐acetylglucosaminidase is tightly related to soil N dynamics along stand development.

Mixed planting improves soil aggregate stability and aggregate-associated C-N-P accumulation in subtropical China

Research on the variations in soil aggregate stability and ecological stoichiometry at aggregate scales by stand type is of great significance in investigating the distribution, limitation, balance, and cycling of organic carbon, nitrogen, and phosphorus (C-N-P). However, the effect of pure and mixed Chinese fir plantations on soil aggregate stability, organic carbon (OC), total nitrogen (TN), and total phosphorus (TP) stoichiometry characteristics at aggregate scales is still unclear. In this research, we explored the variations in soil aggregate mean weight diameter (MWD) and geometric mean diameter (GMD); soil OC, TN, and TP contents and stocks and the C:N:P ratios as affected by different stand types (mixed stands of Chinese fir and Mytilaria laosensis, mixed stands of Chinese fir and Michelia macclurei, and pure stand of Chinese fir); and aggregate size (&amp;lt;0.25, 0.25–1, 1–2, and &amp;gt;2 mm) at 0–20 and 20–40 cm depths in subtropical China. The soil OC and TN contents, as well as C:N:P ratios declined as aggregate size increased, whereas the C-N-P stocks showed the opposite tendencies, which were more distributed in &amp;gt;2 mm aggregates. Mixed stands of Chinese fir and M. laosensis with Chinese fir and M. macclurei displayed significantly higher soil aggregate stability, aggregate-associated TP content, OC and TN contents and stocks, and C:N and C:P ratios than did pure stands of Chinese fir. Soil aggregate stability was significantly positively correlated with the C-N-P contents and stocks as well as the C:N and C:P ratios, especially the C:N ratio and TN content. Overall, this work offers further information for scientific management and sustainable development of Chinese fir plantations, soil OC and nutrient cycling with ecological stoichiometry in the global terrestrial ecosystem.

Fine root dynamics and its contribution to soil organic carbon stocks with Caragana intermedia plantation development in alpine sandy land.

Shrubs are the main species in desert ecosystems. Better understanding shrubs fine root dynamics and its contribution to soil organic carbon (SOC) stocks can improve the accuracy of carbon sequestration estimation and provide basic data for the calculation of carbon sequestration potential. The ingrowth core method was used to investigate the fine root (< 1mm in diameter) dynamics of Caragana intermedia Kuang et H. C. Fu plantation with different age (4-, 6-, 11-, 17-, and 31-year-old) in Gonghe Basin of the Tibetan Plateau, and the annual fine root mortality was used for calculation the annual carbon input to SOC pool. The results showed that fine root biomass, production, and mortality first increased and then decreased as the plantation age increased. Fine root biomass peaked in 17-year-old plantation, production and mortality peaked in 6-year-old plantation, and turnover rate of 4- and 6-year-old plantations were significantly higher than other plantations. Fine root production and mortality were negative correlated with soil nutrients at depth of 0-20 and 20-40 cm. The variation range of carbon input by fine root mortality across different plantation age at 0-60 cm soil depth was 0.54-0.85 Mg ha-1 year-1, accounting for 2.40-7.54% of the SOC stocks. C. intermedia plantation has a strong carbon sequestration potential from long time scale. Fine roots regenerate faster in young stands and lower soil nutrients environment. Our results suggest that the influences of plantation age and soil depth should be taken into account when calculating the contribution of fine root to SOC stocks in desert ecosystems.

Strengthening Riau Province's Oil Palm Policy Based on Strengthening Local Institutions in Riau Province Bengkalis

Improving sustainable management of oil palm plantations, providing legal certainty, maintaining and protecting environmental sustainability, including reducing greenhouse gas emissions, and increasing the development of oil palm farmers as well as the productivity of oil palm plantations. The policy aspect of considering sustainable development is something that cannot be missed, it must be discussed in an academic text on an oil palm plantation policy. So we need a model that minimizes the complexity and contestation that often appears in the area of oil palm plantation policy. After the research is carried out, it is expected to be able to formulate policies. These findings are useful for the government as part of the implementation of oil palm plantation policies, while still prioritizing the sustainable development aspect. This policy model can later be developed with the birth of strategies and activities that are interconnected in the development of oil palm plantations in Riau Province because it needs support from many stakeholders. So far, the existing policy pattern is top-down, and the dynamics between implementor actors and target groups in the field sometimes differ from the main objectives of the public policies that have been formulated so far. This research will provide new insights into a constructive policy model with a microscope because it is about public and private goods, which provide benefits for the government and welfare for smallholder plantations to oil palm farmers.&#x0D; Keywords: palm oil policy, smallholder plantation, sustainable development