Rice Farmers Research Articles

Vegetative Index Intercalibration Between PlanetScope and Sentinel-2 Through a SkySat Classification in the Context of “Riserva San Massimo” Rice Farm in Northern Italy

Rice farming in Italy accounts for about 50% of the EU’s rice area and production. Precision agriculture has entered the scene to enhance sustainability, cut pollution, and ensure food security. Various studies have used remote sensing tools like satellites and drones for multispectral imaging. While Sentinel-2 is highly regarded for precision agriculture, it falls short for specific applications, like at the “Riserva San Massimo” (Gropello Cairoli, Lombardia, Northern Italy) rice farm, where irregularly shaped crops need higher resolution and frequent revisits to deal with cloud cover. A prior study that compared Sentinel-2 and the higher-resolution PlanetScope constellation for vegetative indices found a seasonal miscalibration in the Normalized Difference Vegetation Index (NDVI) and in the Normalized Difference Red Edge Index (NDRE). Dr. Agr. G.N. Rognoni, a seasoned agronomist working with this farm, stresses the importance of studying the radiometric intercalibration between the PlanetScope and Sentinel-2 vegetative indices to leverage the knowledge gained from Sentinel-2 for him to apply variable rate application (VRA). A high-resolution SkySat image, taken almost simultaneously with a pair of Sentinel-2 and PlanetScope images, offered a chance to examine if the irregular distribution of vegetation and barren land within rice fields might be a factor in the observed miscalibration. Using an unsupervised pixel-based image classification technique on SkySat imagery, it is feasible to split rice into two subclasses and intercalibrate them separately. The results indicated that combining histograms and agronomists’ expertise could confirm SkySat classification. Moreover, the uneven spatial distribution of rice does not affect the seasonal miscalibration object of past studies, which can be adjusted using the methods described here, even with images taken four days apart: the first method emphasizes accuracy using linear regression, histogram shifting, and histogram matching; whereas the second method is faster and utilizes only histogram matching.

Agent-Based Geosimulation of Yayoi Period Population Dynamics in Kyushu, Japan

Current scholarship in Japanese archaeology recognizes the people and culture of the Yayoi period as being descended from both continental migrants (Toraijin) and the native inhabitants (Jomon people). However, the number of migrants that came to Japan and the degree to which they were directly responsible for the development of Yayoi culture is a topic of debate. Using northern Kyushu as a case study, the author employs an agent-based simulation based on geospatial data to model the spread of population, rice agriculture, and continental genetics during the Early Yayoi period. Multiple simulations are performed with varying parameters related to migrant population size, marriage customs, and the ratio of men to women amongst migrants to test their effect on the demographics of the Yayoi period. Simulation results were compared to population estimates and the distribution of mitochondrial DNA in order to determine their validity. Experiment 1 showed that the average number of continental migrants was likely in the order of magnitude of 10s of people per year (approx. 40 to 50) during the first 500 years of the Yayoi period. Experiment 2 demonstrated that polygyny can lead to increased population growth and aids in the spread of continental genetics, but without more rigorous evaluation criteria it is difficult to conclude whether it was practiced during the period. The methods used in this study demonstrate how agent-based simulations can model realistically sized populations moving through geographic space by basing simulation inputs on geospatial data and population estimates.

An experimental approach to farmer valuation of African rice genetic resources

AbstractGenebanks serve as both providers of valuable traits for breeding programs and repositories of diverse crop genetic material representing society's agricultural heritage. In this study, we use a Becker‐DeGroot‐Marschak mechanism to elicit the willingness‐to‐pay of rice farmers in Côte d'Ivoire for small amounts of African rice (Oryza glaberrima) landraces held by the genebank of the Rice Biodiversity Center for Africa, and for seed of newly developed ARICA rice varieties bred using genebank materials. Using a field experiment, we additionally investigate how randomized exposure to and experimentation with small amounts of African rice landrace seed or seed of advanced rice varieties developed by AfricaRice affect how smallholder rice farmers value these novel genetic resources. Surprisingly, we find that farmers generally value having access to African rice landraces at approximately the same level as for advanced rice varieties (and far above market rates for improved seed), and that those farmers who grew landrace seed in the offseason were willing to pay more than those who did not. Our results demonstrate the additional value provided by the conservation of African rice landrace varieties (apart from their use in breeding) and highlight the importance of experimentation in the adoption process.

Empowering farmer community with technology modernisation to improve rice farming performance through demonstration farms in East Java, Indonesia

Purpose Rice is a strategic commodity and staple food; thus, rice productivity should grow faster than the population. A public agricultural agency launched technology modernisation to improve rice farm performance. This study aims to assess the impact of technology modernisation on rice farming performance and evaluate farmer acceptance of such technology. Design/methodology/approach This study was conducted in 2023-2024, based on selected demonstration farms (demfarm) carried out during 2021-2022 in East Java, Indonesia, one of the rice bowls. Microeconomic theory of production and the double-differences approach were used as fundamental analyses. Farmers were purposively selected to participate in the demfarm. For comparison, farmers with existing technology adjacent to the demfarm were chosen accordingly. Rice production is considered an economic performance indicator, and factors related to socio-demographic and technical aspects were conceptualised using innovation and diffusion theory. Findings The results of demfarm were apparent. Technology modernisation improved rice farming’s economic performance. Farmer acceptance of such technology was relatively high at the first stage. There was no conflict between technology and local culture and norms. The technological package will likely be disseminated to farmers after adequate socialisation. Research limitations/implications This study engaged farmer innovators and early adopters in the demonstration farm. This needs more actions from farmers who are not categorised as innovators and early adopters, which dominate the farmer population. Practical implications Extension officials need field guidance to ensure continual technology adoption because of technology complexity. Originality/value The originality of the study is based on a field experiment and direct observation throughout a crop cycle, and the analysis is established using a solid theory and analytical framework.

A preliminary report of integrating sheep farming in combination with adopting biogas technology in organic rice farming systems in upland areas in Indonesia

This study aims to understand the preliminary results of integrating sheep farming in combination with adopting biogas technology in organic rice farming (ORF) systems in upland areas. The research was conducted in upland areas in Grabag Subdistrict Magelang Regency, Central Java Province (UPL1) and Kertasari Subdistrict, Tasikmalaya Regency, West Java Province (UPL2), Indonesia. At each upland area, a demo plot with a 17 m3 digester has been established, and 120 sheep were introduced. A combination of sheep and beef cattle manure was used as a biogas substrate. The soil sample of one and three-year conversion of ORF was collected, and macro and micro minerals were analyzed. The biogas quality was analyzed, including dry matter (DM), nitrogen (N), carbon (C) and nitrogen-ammonia (N-NH3). The greenhouse (GHG) emissions, including methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O), were measured. The results indicated that C-organic content at three-year conversions of ORF in UPL1 was much lower (P<0.05) than the one-year conversion. The average CH4, CO2, and N2O contents in UPL1 were 661, 477.3, and 0.16 mg/m2/day, respectively. The average CH4, CO2, and N2O contents in UPL2 were 3328, 3038 and 2.42 mg/m2/day, respectively. In UPL1, the proportion of CH4 was 52.5 %, CO2 was 47.4 %, and N2O was 0.01 % while the proportion of CH4 was 57.9 %, CO2 was 42.0 %, and N2O was 0.01 % in UPL2. To conclude, integrating sheep farming in combination with adopting biogas technology in the ORF system improves manure management and provides organic fertilizer, which subsequently reduces the use of artificial fertilizer and avoids GHG emissions.v

Factors Influencing the Use and Choice of Formal Agriculture Credit Sources among Rice Farmers in Chitwan District, Nepal

Agriculture credit is important to sustain and further improve farming practices among rice farmers in developing countries like Nepal. Agriculture credit from formal sources safeguard farmers from fraud and misconduct which are common in informal sources. An investigation was carried out in Chitwan district of Nepal during January, 2023 to identify the factors influencing the use of formal agriculture credit among rice farmers. Further, factors influencing choice of sources among formal agriculture credit users was also assessed. Using random sampling, 59 formal agriculture credit users and 46 informal agriculture credit users were used for the study. Descriptive statistics and logit model were used to interpret the findings. Results revealed that use of formal agriculture credit increases with availability of off-farm income source and membership to agricultural cooperatives among farm household. Efforts should be made to promote participation in agricultural cooperatives to increase usage of formal agriculture credit among farm household. Similarly, choice of cooperatives over bank and microfinance increases with less formal education of the household head and non-availability of off-farm income source among farm household. Likely, choice of bank increases with no participation in agricultural cooperatives and choice of microfinance increases with higher contact with extension workers. Agriculture cooperatives should be further strengthened to provide timely and adequate credit, as it seems to support formal credit users characterized by lower formal education and no off-farm income source.

Penentuan Harga Pokok Beras di Kelurahan Imandi Kecamatan Dumoga Timur Kabupaten Bolaang Mongondow

This study aims to calculate the cost of production of rice in Imandi Village and compare the cost of rice with market prices and prices set by the government. This research uses a quantitative descriptive approach method, data collection is primary and secondary by conducting interviews with rice farmers. This study shows that the results of the calculation of the cost of goods sold, the total cost of the total respondents is Rp270,095,155. and the amount of rice production produced is 39,452 kg so that the cost of goods sold of rice in Imandi Village is Rp6,846/kg.

EFISIENSI TEKNIS DAN FAKTOR YANG MEMPENGARUHI PRODUKSI PADI LOKAL SIGUPAI DI KABUPATEN ACEH BARAT DAYA (Technical Efficiency and Factors Affecting the Production of Local Sigupai Rice in Aceh Barat Daya Regency)

Sigupai rice is highly sought after and has significant economic value. Despite its popularity, the production of Sigupai rice remains relatively low. This study aims to identify the factors influencing the production, technical efficiency, and sources of inefficiency in Sigupai rice farming in West Aceh District. Data was collected from all 31 Sigupai rice farmers in the region and analyzed using the stochastic frontier Cobb-Douglas production function. The results indicate that Sigupai rice farming has achieved a technical efficiency level of 0.80. Land area, seed quantity, and fertilizer were found to significantly influence rice production. However, farmers' age, experience in cultivating Sigupai rice, and education did not have a significant impact on technical inefficiency.To improve the efficiency of Sigupai rice farming, it is recommended to optimize input utilization, including proper land planning and soil management. Additionally, the use of certified Sigupai rice seeds and efficient fertilization techniques can contribute to increased productivity.

Climate Risk Management in Thai Rice Farming: Farmers’ Perceptions, Meteorological Trends, and Determinants of Adaptation Strategies

Climate Risk Management in Thai Rice Farming: Farmers’ Perceptions, Meteorological Trends, and Determinants of Adaptation Strategies

PERSEPSI PETANI TENTANG PENGARUH KINERJA PENYULUH TERHADAP KOMPETENSI PETANI PADI DI KABUPATEN ACEH BARAT (Rice Farmers Perceptions Of The Influence Of Extension Workers' Performance On The Competence Of Rice Farmers In West Aceh Regency)

This study aims to assess how farmers perceive the impact of agricultural extension performance on rice farmers' ability in Alue Tampak Village, Kaway XVI Sub-district, West Aceh District. With a total population of 176 rice farmers, the study adopted a quantitative approach through a survey method. The sample was selected using the Slovin formula, resulting in 64 rice farmer respondents. Data were collected through questionnaires and analyzed using simple linear regression as well as hypothesis testing with the help of SPSS 20. The research findings indicated that farmers' perceptions of agricultural extension workers' performance positively affected their competence in rice farming. The R² value of 0.554 indicates that the performance of agricultural extension workers can explain 55.4% of the variation in farmers' competence, while factors beyond the scope of this study influence the remaining 44.6%. The regression test results yielded the equation Y = 2.599 + 0.631X + e, where the positive coefficient of 0.631 confirms the existence of a positive influence between agricultural extension performance and farmers' competencies.

The Role of Agricultural Technology in Attaining Food Security among Small Farmers in Char Area in Mymensingh District

Farmers in the char areas of Bangladesh are frequently affected by food insecurity due to their low engagement in modern agriculture such as less use of modern agricultural technology. This study evaluates the socio-demographic characteristics of the sample farmers to assess their nutritional status and the factors influencing char dwellers' dietary diversity. Survey data were collected from 70 households, and focus group discussions were conducted using a semi-structured questionnaire from Nilokhiya char under the Mymensingh District of Bangladesh. An OLS regression model was used to estimate the influence of socioeconomic characteristics of sample households on the decision on factors influencing dietary diversity. The farming type of the farmers is another concern of this study where results show that 90% of farmers in the char areas rely on rice and vegetable farming, whereas more than 60% of the farmers are also involved in livestock and poultry farming at the same time. The nutritional status of char farmers shows that their diet includes a variety of foods but is deficient insufficient protein and healthy fats, which could have an impact on their overall nutrition. Cereals are a staple in the diet, as indicated by the high consumption rate (97.1%) and the substantial average intake (2.30 kg/day). Every household consumes fruits, though in smaller quantities (0.28 kg/day). Eggs are less frequently consumed (57.1%) despite a higher intake (2.64 kg/day). Dietary diversity has a strong positive correlation with supply (.913) at a 1 % significant level which means that efficient supply chains minimize delays, reduce spoilage, and ensure a continuous flow of food to markets to ensure food security. A positive correlation with total income (.373) leads to a higher total income also supports greater dietary diversity. Credit was significant at a 5% level (.267) indicating that a 1 % increase in credit leads to an increase in dietary diversity by 267%. On the contrary, Experience has a negative relationship with dietary diversity which means that experience does not influence food security. Lack of transport and communication, environmental hazards, and natural disasters are the most significant problems faced by the farmers in the char area.

Effects of Social Capital on the Adoption of Green Production Technologies by Rice Farmers: Moderation Effects Based on Risk Preferences

In the context of global climate change and energy and resource scarcity, understanding the factors that influence the adoption of green production technology by rice farmers and promoting a transformation in agricultural practices towards low-carbon and environmentally friendly methods represent a crucial step towards achieving sustainable development. This study employs an ordered logit model to comprehensively explore the influence mechanism of social capital and risk preference within the adoption of green production technology by rice farmers. Research indicates that social capital can significantly and positively affect rice farmers’ uptake of green production technology. Among various dimensions, it can be seen that the role of social participation emerges as a particularly salient factor. The analysis of risk preference demonstrates that it exerts a negative moderating influence. The heterogeneity analysis results indicate that new-generation and part-time rice farmers prefer adopting new technologies if they possess higher social capital. In light of the findings above, it is recommended that the organizational support of cooperatives and collective action be reinforced; the use of digital technologies in agriculture should be increased; the livelihood changes of rice farmers be considered to meet their heterogeneous needs accurately; and the integration of carbon emission reduction policies and green production technologies be strengthened to promote the widespread adoption of green technologies among rice farmers.

Does Adoption of Improved Variety Encourage Farmers to Invest in Modern Inputs and Use Good Practices? Evidence from Rice Farmers in Guinea

Abstract Iron toxicity is one of the constraints limiting rice production in Africa. This study used a randomized controlled trial to assess the impact of an iron toxicity-tolerant variety, named ARICA 6, on different outcomes and investment in modern inputs by smallholder farmers. Two rounds of data were collected from 520 rice-farming households in Guinea. Results showed that the use of ARICA 6 increased rice yield by 330 kg ha−1 and net income by US$ 120 ha−1. However, adoption of improved variety may not be enough to crowd in investment in modern inputs because farmers face other constraints.

Economic and Environmental Effects of Farmers’ Green Production Behaviors: Evidence from Major Rice-Producing Areas in Jiangxi Province, China

This study examines the economic and environmental impacts of green production practices among farmers. It aims to contribute to sustainable agricultural development, mitigate agricultural non-point source (NPS) pollution, and align environmental protection with economic growth. This paper utilizes survey data from 1345 farm households in the main rice production areas of Jiangxi Province, China, using the example of reduced fertilizer application (RFA) among rice farmers. This study constructs a slack-based measure data envelopment analysis (DEA—SBM) model with undesirable outputs to measure environmental effects and applies an endogenous switching regression model (ESRM) to test the economic and environmental effects of farmers’ adoption of green production technologies. We found the following: (1) The RFA behavior of farmers has a significant positive impact on their net profit per hectare (NPH), helping farmers increase their income, with the increase ranging from 2.05% to 6.54%. (2) Farmers’ RFA behavior has a significant positive impact on agricultural green productivity (AGP), contributing to the improvement of the environment, ranging from 44.09% to 45.35%. (3) A heterogeneity analysis found inconsistencies in the income-enhancing and environmental-enhancing effects at different quantiles of NPH and AGP. Therefore, attention should be placed on improving the agricultural product quality supervision system under the market circulation mechanism, creating land scale conditions conducive to the promotion and application of fertilizer reduction technologies and promoting the implementation of externality internalization compensation systems.

Human activities, early farming and natural environment in the north-western Kanto Plain (Central Japan) during the Final Jomon–Early Kofun period (990 cal BCE–330 cal CE) inferred from palynological and archaeobotanical records

The emergence, spread and intensification of agriculture, the impact of early agriculture on the natural environment and the possible role of climate on subsistence economies and population dynamics are important research questions in Japanese geoarchaeology. New directly dated archaeobotanical records of the Middle Yayoi (390–200 cal BCE, 1σ error) and Early Kofun (210–330 cal CE) periods from the Ikegami archaeological site and a 1300-year palynological record from the nearby Morinji Marsh help address these questions in the Kanto Plain of Central Japan. The pollen record suggests that management of chestnut and horse-chestnut by Final Jomon people in the study region declined around 750 cal BCE. The microcharcoal record indicates that human-induced fire activity decreased after 990 cal BCE and reached a minimum 500 years later, which coincides with the hemispheric-scale Iron Age Cold Epoch and late Bond event 2. Increasing use of fire from ca. 500 cal BCE is contemporaneous with the earliest evidence of millet-rice cultivation from south-western Kanto and the Central Highlands. This and pollen-based indicators of crop cultivation around Morinji Marsh ca. 200 cal BCE are consistent with the 14C-dated arrival of the first full-scale rice farmers at Ikegami. Their food economy still had a noticeable wild plant component (e.g. beans, walnut, horse-chestnut and acorn), however, the archaeobotanical assemblages from the Early Kofun period show a higher focus on rice cultivation and no evidence of a wild plant component. Variations in the charcoal concentrations and archaeobotanical data from the study region help postulate three phases of farming intensification related to cultural diffusion and/or migration. These phases, dated to ca. 500–300, 300–100 cal BCE and 100 cal BCE–250 cal CE, correspond to the pottery typologically defined late Early–early Middle Yayoi, middle–late Middle Yayoi and Late Yayoi periods, respectively.

Spatial variation in physicochemical water quality parameters associated with Rice farming in the Dakalt Branch Canal, Kafrelsheikh governorate, Egypt

AbstractThe inappropriate use of chemical fertilizers and pesticides in rice farming has been identified as a significant source of pollution in the aquatic environments. The declining water quality has been a cause of concern for the riparian communities owing to ill health associated with the usage of contaminated water from lotic systems draining such rice‐growing areas and its potential to cause lethal and sublethal effects on aquatic organisms. The spatial variation of selected water quality parameters was assessed using multivariate techniques. Data from three sampling stations, collected in triplicates, were analyzed to understand the effects of rice farming practices on the Dakalt Branch Canal's water quality. Eleven physicochemical parameters were measured in situ with a portable multimeter, while nutrients and other chemical parameters were determined following the standard procedures outlined in the American Public Health Association using the UV/Visible spectrophotometer. One‐way ANOVA was used to establish whether or not there were significant differences among means of various parameters. The findings revealed considerable spatial variability in the means for nearly all water quality parameters (p < 0.05). The Water Quality Index revealed that all the sampling stations were polluted with indices of more than 100. We conclude that poor rice management practices are responsible for the observed pollution of the River Nile and potentially lethal and sublethal effects on aquatic organisms and human health. We therefore recommend regular monitoring of the water quality of the Dakalt Branch Canal and that the relevant stakeholders, including farmers, embrace Best Management Practices, especially when applying pesticides and fertilizers.

Awareness and Implications of the Rice Tariffication Law (Republic Act 11203) among Irrigation Association Members in Dipolog City, Philippines

The Rice Tariffication Law, enacted in the Philippines in 2019, aimed to reduce rice prices for consumers while supporting rice growers through various assistance measures. This study assessed the awareness and implications of the Rice Tariffication Law (Republic Act 11203) among irrigated rice farmers in selected barangays of Dipolog City, Philippines. Interviews with 82 farmers revealed that although 71% were aware of the law, their understanding of its objectives (71%) and key provisions (70%-77%) was limited. Nevertheless, all participants received government assistance in the form of farm mechanization, fertilizers, financial aid, and seeds. Farmers unanimously acknowledged both the positive and negative effects of the law. Statistical analysis showed a significant difference in the average income per hectare of rice farmers before and after the law's implementation. The study recommends educational initiatives, particularly through institutions like Jose Rizal Memorial State University, to enhance farmers' understanding and dissemination of the law's objectives and key provisions.

Prealighting and Postalighting Volatile Organic Compounds Emitted by Rice Influence the Behavior of Scirpophaga incertulas.

Yellow stem borer (YSB), Scirpophaga incertulas, is a major rice pest causing significant yield losses worldwide. We investigated how volatile organic compounds (VOCs) released by the rice variety TN1, both before and after infestation, as well as by its companion weeds, Echinochloa colona and Echinochloa crus-galli, influence the behavior of YSB in host selection, recognition, and establishment. Olfactometry bioassays showed that uninfested TN1 plant VOCs attracted YSB more than those from YSB-infested rice plants and weeds. Changes in the VOC profile of TN1 during 24-48 h post-YSB infestation revealed that these postalighting compounds may deter YSB oviposition. Xylene, cymene, 1,2,3,4-tetrahydro naphthalene, dodecanol, and tetradecanol could be possible YSB attractants based on metabolomics, olfactometry, and GC-EAD studies. This work illuminates rice plant-YSB chemical interactions and VOCs dynamic function in attraction and defense processes. These findings provide a foundation for developing VOC-based pest management strategies to mitigate yield losses in rice farming.

How Do Greenhouse Gases and Other Factors Affect Rice Production in Bangladesh? An Insight from Autoregressive Distributed Lag Approach

Purpose: The study aims to elucidate the impact of greenhouse gases and other factors on rice production in Bangladesh. By considering the influences of greenhouse gases, technological factors, and industrial activities, the research unveils significant insights into the long-term and short-term effects on rice production. Methodology: This research employs the Autoregressive Distributed Lag (ARDL) approach to investigate the impact of carbon dioxide, nitrous oxide, agricultural land, agriculture as percentage share of GDP, and industry on rice production in Bangladesh through EViews-12 Software. Findings: Our findings suggest that CO2 emissions, industrial and agricultural share as percentage of GDP exhibit a negative impact, decreasing rice production, while N2O and agricultural land have a notable positive effect. Technical factors such as the area under rice cultivation, agriculture and industry are identified as pivotal contributors to rice production. Practical Implications: Finally, the study concludes with policy implications and recommendations based on our findings for sustainable agricultural practices, technological advancements, and policy interventions tailored to enhance rice production and secure food sustainability in the unique agricultural landscape of Bangladesh. Originality/Value: As per as our knowledge, no research has been carried out in Bangladesh to investigate the impact of greenhouse gases and selected factors on rice production. Research Limitations: Due to difficulties in data collection procedure, we could not include all variables of greenhouse gases. We expect in future, there will be more data sources which would help many researchers to contribute to rice production related researches.

Traditional Self-Governing Institution of the Co Ho Sre People in Lam Dong in Current Social Life

The Co Ho Sre people, the largest local group within the Co Ho ethnic group, had a long-standing culture, highlighted by developed wet rice farming and stable settlements in their villages. The village of the Co Ho served as a traditional social organization with essential functions in organizing, managing, and operating the community regarding economy, society, culture, and ethnic consciousness in a context of low development. The traditional self-governing institution of the Co Ho village relied on customary laws and the prestige of the village chief to govern all activities within the village. Although there have been many changes in social management, the self-governing institution of the Co Ho Sre still retained many positive elements, playing an essential role in building the Co Ho Sre community in particular and minority ethnic communities in Lam Dong in general. The article applied synthesis and analysis methods along with survey and interview methods to reconstruct the traditional self-governing institution and evaluate its role in the current life of this ethnic group.