Agricultural History Research Articles

The evolution of cropping structure in prehistoric Xizang

The origin and spread of agriculture facilitated a decline in human mobility and eventually led to a predominantly sedentary lifestyle globally, including on the Tibetan Plateau. Previous studies have proposed an evolution of prehistoric agriculture, from millet-based to barley-based farming. However, details regarding the process are vague. Here, we present diachronic changes in cropping structure from Xizang on the basis of a quantitative analysis of archaeobotanical remains from 12 sites located in southeastern Xizang. The advent of agriculture in Xizang began in the southeastern region around 4800 cal a BP and resulted in a quick spread of millet agriculture from the Hengduan Mountains to the Yarlung Zangbo River region. Subsequently, the introduction of barley and wheat in Xizang led to the transformation of millet-based farming into mixed farming after 3600 cal a BP. Eventually, around 3000 cal a BP, barley and wheat dominated across the entire Xizang with declining occurrences of millet. It took more than 600 years for barley and wheat to dominate in the Tibetan cropping system, which may reflect the time required for these exotic species to adapt physiologically to their new niche. In addition to the diachronic changes in crop farming, the ratio of barley to wheat and foxtail millet to broomcorn millet also varied at different elevations possibly due to local environmental variations and the crops’ physiological requirements.

Early Holocene exploitation of taro and yam among southern East Asian hunter-gatherers

Increases in population size are associated with the adoption of Neolithic agricultural practices in many areas of the world, but rapid population growth within the Dingsishan cultural group of southern China pre-dated the arrival of rice and millet farming in this area. In this article, the authors identify starch grains from taros (Colocasia) and yams (Dioscorea) in dental calculus and on food-processing tools from the Dingsishan sites of Huiyaotian and Liyupo (c. 9030–6741 BP). They conclude that the harvesting and processing of these dietary staples supported an Early Holocene population increase in southern East Asia, before the spread of rice and millet farming.

From fragments to system: a research on the mesoscale structure of vernacular landscapes in the Hang-Jia-Hu area, China

ABSTRACT Vernacular landscape incorporates spatial structures intimately associated with regional environments, agricultural production, and rural life. Analyzing and understanding these structures can help reveal spatial patterns and intrinsic mechanisms of vernacular landscapes and provide reference for contemporary rural construction. This paper aims to analyze the mesoscale structure of vernacular landscapes in the Hang-Jia-Hu area by discussing spatial relationships between four main elemental patches: water systems, farmlands, settlements and hills. Special attention is given to the correlations between landscape structure and local agriculture. Initially adopting a grid sampling approach, the paper extracts 31 fragment samples of vernacular landscape images (each 2 × 2 km) from the satellite imagery of the Hang-Jia-Hu area. Subsequently, via semantic segmentation, the four elements are identified and differentiated. Integrating related knowledge from environmental history, agricultural history, human geography, and other disciplines, the paper carries out a typological analysis on the vernacular fragment samples, deriving the latent structural types, which consist of concepts and abstract schemas. Based on the association between these structural types, establishes a structural system, as the primary integrated conclusion of this research, and looking forward to offering framework reference for contemporary rural construction.

‘The rules of nature are changing; every year is unpredictable’: perceptions of climate change by beekeepers of Liguria, NW Italy

Beekeeping activity is a privileged lens for looking at the impacts of climate change since this human activity is profoundly and intimately embedded in the local ecology with particular reference to the flora. Therefore, we conducted 47 semi-structured interviews to identify the local perceptions of climate change impacts and their drivers among beekeepers of Liguria, a mountainous region of NW Italy. We found that beekeepers especially noticed changes in bee productivity and behaviour and melliferous flora productivity. Moreover, drought is a significant driver of changes in beekeeping as it affects both bees and melliferous plants. However, other drivers, namely alien species, pesticide spread, and abandonment of small-scale agriculture, also concur synergistically. We conclude that landscape planning sensitive to the needs and requests of beekeepers can further contribute to their adaptation to the impacts of climate change and reduce other detrimental phenomena on honeybee wellbeing by supporting small-scale agriculture to maintain a diverse landscape that provides fodder for pollinators.

The Contribution of Subsistence Agriculture to the Livelihoods of the Smallholder Farmers in South Kivu Province, Democratic Republic of Congo

Subsistence agriculture in most cases is practiced on a limited space of land by farmers and it is dependent on human power that results into production of food consumed at household level, with little or no surplus for sale. A study about the contribution of subsistence agriculture to the livelihoods of the smallholder farmers in south Kivu province was carried out. A total of 303 smallholder farmers were randomly selected and interviewed to examine the effects of practicing subsistence agriculture on the socioeconomic status of the farmers. How the socioeconomic status attained by the farmers influenced their sustainable livelihoods was also assessed. Data were analyzed using means, frequency distribution, correlation, ANOVA and Chi square test. Thematic analysis was done on qualitative data. The farmers practiced shifting and primitive agriculture, intensive subsistence, and nomadic herding. There was a significant difference in the yields of crops grown (F = 0.0088; P = 0.05), while education and income status significantly affected the farmer’s socioeconomic status by practicing subsistence agriculture (P < 0.05). An average mean value of 3.12 for the components of the farmers’ livelihoods were exhibited, with the human capital mean value being highest (4.16) compared to natural, social and financial capital. The socioeconomic status attained had a significant effect on sustainable livelihoods of the farmers at P < 0.05. This implies that the smallholder farmers need to be trained by the agricultural extension workers better and sustainable methods of farming for higher crop yields. In addition, the Central Government though the Ministry of Agriculture, should avail improved seed inputs to the local community for better crop yields. All these will enable the smallholder farmers improve their socioeconomic status and at the same time attain higher sustainable livelihoods.

Physical properties and organic carbon in no-tilled agricultural systems in silty Pampas soils of Argentina

Context Under continuous long-term no-till farming, many silty soils develop platey and massive compacted structures in topsoil, ascribed to low crop diversification and intense agricultural traffic. Aims We hypothesise that agricultural scenarios of greater diversification and cropping intensity should increase carbon (C) inputs and total and particulate organic C, resulting in the disappearance of these platey and massive compacted structures and soil compaction. Methods The hypothesis was tested in 55 selected production fields (lots or macro-plots of trials with a cultivated area greater than 15 ha) and five non-cultivated sites across the Rolling Pampas of Argentina. The whole area was covered by fine, illitic, thermal, silty loams (Typic Argiudolls, US Soil Taxonomy; Typic Phaeozems, FAO Soil Map). Based on estimations of the crop intensity index (CII; proportion of days in the year with active crop growth) and recent agricultural history of crop sequences, sampled fields were grouped into five categories: soybean (Glycine max) monoculture (CII < 0.45; mean CII = 0.39); low intensity cropping sequence (CII = 0.45–0.60; mean CII = 0.50); high intensity cropping sequence (CII = 0.60–0.80; mean CII = 0.66); pastures for hay bale production (CII = 1.0); and quasi-pristine situations (areas with non-implanted and non-grazed grass vegetation or with negligible stocking rate, CII = 1.0). Key results Total C inputs to soil varied within ~1400–7800 kg C ha−1 year−1 and were significantly and positively related to crop intensity index (P < 0.0001, r = 0.83). The highest (P < 0.05) soil organic C levels were observed in the first 0.05 m of soil and quasi-pristine conditions (even higher than under pasture), and the lowest (P < 0.05) under soybean monoculture. In the 0.05–0.20 m soil layer, quasi-pristine conditions had significantly (P < 0.05) higher soil organic C levels; the other situations did not differ. Soil organic C and particulate organic C levels (0–0.05 m layer) were related to both CII and annual C input. Platey structures and clods >0.1 m (0–0.2 m layer) were negatively related to CII (r = −0.59 and −0.45, respectively; P < 0.0001) and C inputs from crops (r = −0.60 and −0.29, respectively; P < 0.01). Nevertheless, this did not result in soil compaction alleviation, as shown by soil bulk density, maximum penetration resistance and water infiltration variations. About 92% of the samples with soil bulk density above the threshold (1.35 Mg m−3), and about 32% of the total records, presented levels of maximum penetration resistance, aeration porosity and/or water infiltration beyond the values suggested as critical. Conclusions Although soil organic C in topsoil varied as hypothesised, the studied soil physical properties did not. This partially rejects our hypothesis. Implications This study underscores the intricate interplay between crop intensity, SOC enhancement, soil structure improvement and the persistent challenge of subsoil compaction.

Preoperative MRSA screening using a simple questionnaire prior elective total joint replacement.

The purpose of this study was to evaluate the management and results of our standarized protocol for preoperative identification of MRSA colonisation in patients undergoing primary total hip and knee replacement procedures. Following hospital protocol, between January 2016 and June 2019 37,745 patients awaiting elective joint replacement underwent a standardized questionnaire to assess the risk of MRSA infection, identifying patients requiring preoperative MRSA screening. An evaluation of the questionnaire identified effective questions for identifying infected patients. Furthermore, an analysis evaluated the impact of comorbidities or Charlson Comorbidity Index scores on positive MRSA colonization. Additionally, we evaluated the cost savings of targeted testing compared to testing all surgery patients. Of the 37,745 patients, 8.057 (21.3%) were swabbed, with a total of 65 (0.81%) positive tests. From this group 27 (36.48%) who were treated were negative before surgery. Some of the questionnaire results were consistently associated with a higher chance of colonization, including hospitalization during the past year (47,7%), previous history of MRSA (44,6%), and agriculture or cattle farming related work (15,4%). By selectively testing high-risk patients identified through the questionnaire, we achieved a 79% reduction in costs compared to universal MRSA screening. Our results suggest that the simple and standardized questionnaire is a valuable tool for preoperative screening, effectively identifying high-risk patients prone to MRSA colonisation. The risk of periprosthetic joint infection (PJI) and its associated sequelae may be reduced by this approach.

Lynchet-Type Terraces, Loess, and Agricultural Resilience on Chalk Landscapes in the UK and Belgium

Lynchets, often the defining component of historic agricultural landscapes in northern Europe, are generally associated with soft-limestone geologies and are particularly well developed on loess-mantled landscapes. To understand their formation and chronology, the authors present their geoarchaeological analyses of lynchet soils and loess deposits at Blick Mead and Charlton Forest in southern England, and Sint Martens-Voeren in Belgium. The lynchets date from the late prehistoric to the medieval periods and were constructed by plough action at the English sites, and by both cut-and-fill and ploughing in Belgium. This has resulted in the preservation of highly fertile loessic soils across chalk slopes, lost elsewhere. Although each example is associated with local/regional agricultural histories, the lynchets’ effective soil-retention capacities allowed them to survive as important heritage features with environmental benefits over millennia.

Postglacial vegetation and climate change in the Lake Onega region of eastern Fennoscandia derived from a radiocarbon-dated pollen record

With its numerous environmental archives stored in lake and peat sediments and relatively low human pressure, the Lake Onega region in eastern Fennoscandia is regarded as a particularly promising area for studying past changes in vegetation and climate since the Lateglacial period. The 885-cm-long sediment core RZ19 (62°27′53″N, 34°26′4″E) was collected from Razlomnoe Peat on the northern shore of Lake Onega in 2019, radiocarbon-dated and analysed for pollen and cryptogam spores. The age-depth model suggests continuous sedimentation since ca. 11,800 a BP (all ages given in years (a) or kiloyears (ka) before present (BP) with BP referring to 1950 CE). The results of pollen analysis and pollen-based biome reconstruction show rapid afforestation of the area in the Early Holocene, although the scores of the tundra biome remain relatively high prior to ca. 11,450 a BP, suggesting that the vegetation was likely more open than today. Between 8300 and 8000 a BP, Betula sect. Albae shows a marked increase in pollen percentage, while Pinus sylvestris experiences a marked decrease. These changes coinciding with the 8.2 ka BP cooling event indicate less favourable conditions for Scots pine while being beneficial for fast-growing birch. The transition from the Early to Middle Holocene (i.e. from Greenlandian to Northgrippian) is marked by an increase in pollen productivity, spread of Picea and further afforestation of the area. The decrease in arboreal and Picea pollen percentages and the abrupt increase in landscape openness after ca. 4000 a BP mark the onset of the Late Holocene (i.e. Northgrippian-Meghalayan transition) and likely reflect the combined effect of insolation-induced temperature decrease and associated paludification and forest retreat rather than a decrease in atmospheric precipitation and/or spread of Late Neolithic agriculture.

The Contribution of Subsistence Agriculture to the Livelihoods of the Smallholder Farmers in South Kivu Province, Democratic Republic of Congo

Subsistence agriculture is practiced in most parts of the world on a limited space of land by farmers. It is mainly dependent on human power that results into production of food consumed at household level, with little or no surplus for sale. A study about the contribution of subsistence agriculture to the livelihoods of the smallholder farmers in south Kivu province was carried out. A total of 303 smallholder farmers were randomly selected and interviewed to examine the effects of practicing subsistence agriculture on the socioeconomic status of the farmers. How the socioeconomic status attained by the farmers influenced their sustainable livelihoods was also assessed. Data were analyzed using means, frequency distribution, correlation, ANOVA and Chi square test. Thematic analysis was done on qualitative data. The farmers practiced shifting and primitive agriculture, intensive subsistence, and nomadic herding. There was a significant difference in the yields of crops grown (F = 0.0088; P = 0.05), while education and income status significantly affected the farmer’s socioeconomic status by practicing subsistence agriculture (P < 0.05). An average mean value of 3.12 for the components of the farmers’ livelihoods were exhibited, with the human capital mean value being highest (4.16) compared to natural, social and financial capital. The socioeconomic status attained had a significant effect on sustainable livelihoods of the farmers at P < 0.05. This implies that the smallholder farmers need to be trained by the agricultural extension workers better and sustainable methods of farming for higher crop yields. In addition, the Central Government though the Ministry of Agriculture, should avail improved seed inputs to the local community for better crop yields. All these will enable the smallholder farmers improve their socioeconomic status and at the same time attain higher sustainable livelihoods.

Vertical Farming: Revolutionizing Sustainable Agriculture in the 21st Century

Vertical farming has emerged as a revolutionary approach to sustainable agriculture in the 21st century, addressing the challenges of population growth, urbanization, and climate change. This article provides a comprehensive overview of vertical farming technologies, strategies for soil and water conservation, and the potential benefits and limitations of this innovative agricultural system. The article explores the history and development of vertical farming, the various types of vertical farming systems, and the key components and technologies involved. It also discusses the environmental, economic, and social implications of vertical farming, including its potential to reduce land use, water consumption, and carbon emissions, while increasing crop yields and food security. The article presents case studies of successful vertical farming projects around the world and identifies future research and development needs to further advance this field. The potential of vertical farming to transform the agricultural landscape and contribute to sustainable urban development is highlighted, along with the challenges and opportunities for widespread adoption. The article concludes with recommendations for policymakers, researchers, and practitioners to support the growth and development of vertical farming as a sustainable solution for meeting the food demands of a growing global population.

Water, Wealth, and Engineering Wisdom: Shaping Tucumán's Agricultural Future, 1890-1910.

Focusing on Argentina's sugarcane province of Tucumán from 1870 to 1910, this article examines the processes of engineering professionalization in Argentina and its application to pressing environmental problems. Engineers were central to the processes through which elites in Latin America sought to attract foreign investment in agriculture, integrate their countries into the global economy, and provide expertise that enabled states to advance a techno-scientific imaginary based on liberal economic progress. Progressive bureaucrats and engineers, such as civil engineer Carlos Wauters, believed that they could use hydraulic infrastructure to transform Tucumán from an agricultural monoculture to a polyculture; others believed that infrastructure should be used to support a sugar monoculture. In exploring this issue, this article bridges the fields of engineering history, agricultural history, and environmental history. It also incorporates Latin America into global scholarship on the emergence and evolution of professional engineering.

CHARACTERISTICS OF THE LAND FUND OF NAKHCHIVAN AUTONOMOUS REPUBLIC

The article deals with the spread of agriculture and animal husbandry over vast territories, the transformation of natural landscapes, the formation of new economic areas with the development of productive forces, and the further multiplication of environmental impacts. We are talking about anthropogenic landscapes formed as a result of human economic activity, and about a number of dangers of these landscapes for life. We are talking about an increase in the area of the geographical environment, a continuous change in the natural land fund in an anthropogenic direction and that this change is due to an increase in the population and the share of the economy. It is about growing crops and ensuring the food needs of animals, as well as the need to meet the needs of people in agricultural and food products, and the importance of human land use in the field of agriculture. They talk about the rational and irrational use of nature by man and that, with rational use, the balance with nature is not disturbed. And with inefficient use, it is said that a person has taken away material goods and does not take any measures to maintain balance, as a result of which natural landscapes are transformed, the connection between natural complexes is disrupted. Based on the article, it can be said that agricultural activities and natural landscapes on the territory of Sharur, Babek, Kangerlinsky and Julfa districts have undergone a greater transformation.

Figurative Representations in the North European Neolithic—Are They There?

This article offers a comprehensive survey of figurative finds from Neolithic northern Europe. The survey shows that the immediate absence of figurative representation in the region is real and that the almost complete lack of figuration stands out from the previous Mesolithic and the contemporary northern and northeastern European Neolithic hunter-gatherer groups. Furthermore, the absence of figurative representations contrasts strongly with the thousands of clay figurines that characterize the southeastern European and Anatolian Neolithic. The survey provides a well-documented basis for discussing the significant differences between a figurative southeastern European Neolithic and an imageless northwestern European Neolithic. We suggest that the absence of figurative representations indicates that severe socio-cultural and religious/ideological changes took place within the Neolithic communities as agriculture spread from southeastern Europe via central Europe to northern and western Europe.

Seasonal nitrate variations, risks, and sources in groundwater under different land use types in a thousand-year-cultivated region, northwestern China

The global public health concern of nitrate (NO3−) contamination in groundwater is particularly pronounced in irrigated agricultural regions. This paper aims to analyze the spatial distribution of groundwater NO3−, assess potential health risks for local residents, and quantitatively identify nitrate sources during different seasons and land use types in the Jinghuiqu Irrigation District, a region in northwestern China with a longstanding agricultural history. The investigation utilizes hydrochemical parameters, dual isotopic data, and the Bayesian stable isotope mixing model (MixSIAR). The findings underscore significant seasonal variations in the average concentrations of NO3−, with values of 87.72 mg/L and 101.87 mg/L during the wet and dry seasons, respectively. Furthermore, distinct fluctuations in nitrate concentration were observed across different land use types, whereby vegetable lands manifested the maximum concentration. Prolonged exposure to elevated nitrate concentrations may pose potential health risks to residents, especially in the dry season when the non-carcinogenic groundwater nitrate risk surges past its wet season counterpart. The MixSIAR analysis revealed that chemical fertilizers accounted for the majority of nitrate pollution in vegetable lands, both during the dry season (49.6%) and wet season (41.2%). In contrast, manure and sewage contributed significantly to NO3−concentrations in residential land during the wet (74.9%) and dry seasons (67.6%). For croplands, soil nitrogen emerged as a dominant source during the wet season (42.2%), while chemical fertilizers prevailed in the dry season (38.7%). In addition to source variations, the nitrate concentration of groundwater is further affected by hydrogeological conditions, with more permeable aquifers tending to display higher nitrate concentrations. Thus, targeted measures were proposed to modify or impede the nitrogen migration pathway, taking into consideration hydrogeological conditions and incorporating domestic sewage, organic fertilizer, and agricultural management practices.

Cultural versus demic diffusion in agricultural expansions according to three definitions of dispersal distances

Mathematical models of agricultural spread use distances between birthplaces of parents and their children (often called “birthplace distances”). However, the difficulty to find those distances for pre-industrial farmers has often led to the use of other kinds of distances. One example is the distance between the birthplace and the place of residence of each individual (“residence distances”). Another example is the separation between the birthplaces of parents (“mating distances”). It is poorly known to what extent the latter two distances are valid approximations to birthplace distances. In order to address this question, we have prepared a database with the three distances for a specific pre-industrial agricultural population (the Yanomamö). For the spread of the Neolithic in Europe, all three kinds of distances yield spread rates consistent with the archaeological data, as well as cultural effects below 50% (so demic diffusion was more important than cultural diffusion). The three kinds of distances also yield estimations for the percentage of early farmers who interbred with hunter-gatherers that are consistent with the corresponding estimation from genetics. There is wide agreement for the cultural and demic effects in other expansions of agriculture and/or herding (the spread of the Neolithic in Asia, Bantu, and Khoikhoi expansions; the spread of rice in Asia, etc.) and using distances measured for other populations. We conclude that estimates are largely insensitive to the kind of distances used. This implies that the conclusions drawn so far in the literature using these three kinds of distances are robust.

A British Military Engineer, the Ganga and the Spectre of Control in Colonial Northern India (1839–1854)

Much has been written about environmental and agrarian history in South Asia. These documented histories provide a fascinating overview of structural changes brought about through infrastructural development and modes of colonial governance. However, specific and advanced forms of intervention were introduced in the nineteenth century, which was defined by the accelerated scale of exploitation of the environment. This article offers an account of the Ganga Canal, constructed in mid-nineteenth century colonial India, under British engineer Proby Cautley, by drawing water from the river Ganga. The paper revisits his motivations and challenges and the scope of his plan to make two arguments. First, it argues that the engineering model of Cautley reflects his deeper entanglement with the ideals of colonial modernity, such as controlling the natural world. Second, the colossal scale of hydrological experimentation through the processes of canal construction, in turn, transformed the imagination of the river into an object.

An overview of ethnographic sources for the study of agriculture in medieval Novgorod

The subject of this article is a set of ethnographic sources related to agricultural activities. This complex includes items from the expositions of ethnographic museums, photographs from the collections of local historians and the Internet, as well as the autobiography of the peasant I.S. Karpov. The use of ethnographic sources for the study of agricultural activities in the Middle Ages is extremely important due to the fact that archaeological material does not always reach our days in complete preservation. For example, such complex devices as ploughing implements in archaeological collections only have iron tips of their working parts, therefore, it is necessary to refer to ethnographic materials to restore their appearance. The same can be said about the technology of cultivating the land. To select the necessary material for this study, the works of Russian ethnographers and archaeologists devoted to the history of agriculture and folklore were studied. A selection of photographic materials from the collections of local historians and publicly available photographs from the Internet was also carried out. The article presents an overview of various types of ethnographic materials and the experience of their application for the reconstruction of agricultural activities of the inhabitants of medieval Novgorod according to archaeological data. The main contribution of the author to the research of the topic is the expansion of the range of ethnographic sources, which are most often involved in this kind of research. In this work, the experience of using not only physical material and photographs from the collections of ethnographic museums, but also folklore, was demonstrated for the reconstruction of agricultural processes that cannot be interpreted according to archaeological data. Traditional economic activities such as farming, hunting or various crafts are rooted in the deep past and retain their characteristics for a long time. This feature allows researchers to fully reconstruct certain processes about which only archaeological evidence has been preserved, which do not always reach our days in full.

Fields of contestation and contamination: Maize seeds, agroecology and the (de)coloniality of agriculture in Malawi and South Africa

Farmer-managed seed systems and the conservation of agrobiodiversity are increasingly recognized as important components of food and seed sovereignty. In contrast, hybrid, genetically modified (GM), and, increasingly, gene-edited crops continue to be promoted by Green Revolution proponents as a “climate smart” package that includes fertilizers, pesticides, purchased seeds, and links to global markets. Influencing seed laws and policies to support the uptake of modern crop varieties has been a key entry point in many countries, facilitated by networks of foreign donors, philanthropists, governments, and multinational companies. Using the case of South Africa, where GM crops have been grown for several decades, we provide insights on implications for Malawi, which passed a Seed Act in 2022, implicitly supporting GM crops. Both countries have histories of colonial agriculture with strong policy support for modern, hybrid varieties of maize, and the replacement (and displacement) of local, open-pollinated maize varieties. In South Africa, several studies have revealed the contamination of smallholder fields and seed systems. Through a political ecology lens, we explore how maize and its cotechnologies were commodified in South Africa and Malawi, and what South African experiences of GM crop adoption in smallholder farming systems can tell us about the challenges to be faced by smallholder Malawian farmers. We reveal how colonial histories and ongoing colonialities of power, knowledge, being, and nature continue to shape the character and form of agriculture in both countries, running counter to the needs of agroecological smallholder farmers and their ways of knowing and being. We conclude by envisioning what reimagined, transformed and decolonial approaches for food and agriculture might look like on the African continent, and how they might contribute toward the attainment of food and seed sovereignty and an agroecological future.

중국 동북지역 한인 入籍(國籍) 문제의 通時的 고찰

2022 marks the 70th anniversary of Yanbian Korean Autonomous Region. This means that the history of Korean-Chinese who settled in the country without returning to their homeland after the defeat of Japanese imperialism has been more than half a century. It also means that historical research on Korean-Chinese history has also gone through a long period of time.
 Research on Korean-Chinese history began in the 1950s and 1960s after the founding of the People's Republic of China and has been actively developed since the 1980s. In particular, in the late 1990s and early 2000s, the first generation of Korean-Chinese history researchers who were trained through a systematic degree curriculum produced the results of the study continuously. These studies range from each country's policy history toward the Korean- Chinese to economic history, including the formation of Korean-Chinese society, rice farming, land systems, and Japanese invasion history.
 Based on these research results, this paper attempted to grasp the intrinsic implications contained in it by presenting data that give a glimpse of China's perception of the Manchurian region, and also looked at the implications of the concept of 'dual nationality', which is used in different meanings in various cases, for each period. The tentative opinion thrown in this paper should be further specified through my research work in the future.