Present status of Dark green bulrush [Scirpus atrovirens (Wild.)] cultivation at Tala Upazila of Satkhira District

Cotton productivity continues to be disputed, despite rapid advancements and widespread technologies. These uncertainties remain to be critically addressed in a broad spectrum focusing on domains at the global level. Therefore, this systematic review provides an overview of the existing advancements in knowledge, skills, and technologies for sustainable cotton production on small landholdings. Specifically, the areas of the cotton chain examined are threefold: - (1) Explore disguised agronomic practices to be endowed for sustainable cotton production on small landholdings; (2) Explore socioeconomic settings based on their disparities in contributing to sustainable cotton production on small landholdings; and (3) Explore existing and feasible institutional policies to be enforced for sustainable cotton production on small landholdings. This review shows that worldwide cotton production involves conventional and organic systems, at the expense of the traditional system. Heavy uses of nitrogenous fertilizers and pesticides are the common practices in conventional systems, with some adoptions of precision agriculture practices, and genetically modified varieties. Rotation and intercropping with early-maturing food crops are also identified viable options to improve farmers’ attitudes toward adopting cotton-producing technologies. In socioeconomics, farmers’ livelihoods are improved by income generation from sales of cotton and labour in the cotton industry. Gender equity in the cotton industry prioritizes females over males, as females display a group with a higher level of technology adoption. Generally, clear institutional policies governing the cotton industry are globally paucity. Furthermore, efforts to sensitize sustainable cotton production are still highly questionable and challenged by the superseding climate changes.

BackgroundThe popularity of ketamine for recreational use has been increasing in Asia, including Taiwan. Still, little known about the pattern of ketamine expectancies and whether such patterns are related to ketamine use. This study aimed to examine whether the positive and negative ketamine expectancies are differentially associated with ketamine-using behavior, and whether such relationship may differ by early-onset use of tobacco or alcohol.MethodsParticipants were recruited using respondent-driven sampling (RDS) among regular tobacco and alcohol users, aged 18 to 50, residing in Taipei from 2007 to 2010. Totally 1115 participants (with an age distribution skewed to the right, median = 26; interquartile range: 22–32) had information on substance use and completed a 12-item ketamine expectancies questionnaire (with 6 positive and 6 negative statements). Using two axes of High and Low expectancies, the four combinations of binary positive and binary negative ketamine expectancies were created. Each participant’s drug-using experience was categorized into illicit drug naïve, exclusive ketamine use, polydrug ketamine use, or other illicit drug use. Using the weights in the network output by RDS Analysis Tool, multivariable logistic regression analysis was then conducted.ResultsThe weighted prevalence was 2.4% for exclusive ketamine use, 9.0% for polydrug ketamine use, and 9.1% for the other illicit drug use. Ketamine users (11.4%) had greater positive expectancies and lower negative expectancies, particularly the combination of High Positive with Low Negative, as compared to the illicit drug-naïve or other illicit drug users. After adjustment for early-onset tobacco (or alcohol) use and sociodemographic characteristics, High Positive, Low Negative, and their combination of High Positive-Low Negative expectancies remained strongly associated with ketamine uses, without evidence of moderation from early-onset use of tobacco or alcohol.ConclusionsPositive and negative ketamine expectancies were associated in opposite directions with ketamine use, independent of early-onset use of tobacco or alcohol. Our results indicate ketamine expectancies as possible targets for future intervention and prevention of ketamine use, with a less confrontational feedback on decreasing an individual’s positive expectancies is essential in preventing young people from the initiation of ketamine use.

As a vast degraded land ecosystem, the karst region of southwest China is currently experiencing serious conflicts between restoration of degraded vegetation communities and agricultural activities. Furthermore, it is not clear what land use pattern suits local farmers best. To evaluate the sustainability of the degraded agricultural ecosystems in the region, methods for emergy analysis were used to compare the ecological and economic benefits from seven typical agroforestry planting patterns in the Yunnan province. The eco-efficiencies of the apple pattern (AP), pear pattern (PP), pomegranate pattern (PRP) were all lower than that of the traditional corn pattern (CP), although the economic benefit was higher than that of CP. Ecological benefits of the apple-soybean pattern (ASP) and the pear-pumpkin pattern (PPP) were not significantly improved, while ecological and economic benefits of the pomegranate-grass-sheep pattern (PGSP) was improved significantly. Intercropping pumpkin in PP increased the economic efficiency by 28.3%, which was superior to that of the intercropping of soybeans (4.6%) in AP. These data implied that interplanting crops in AP and PP might result in higher economic benefit than the existing interplanting pattern. The multistory agroforestry planting pattern and raising in PGSP could optimize the relationship among tree-grass-sheep and improve ecological and economic benefits. Additionally, scenario analysis showed that local farmers might enjoy better ecological and economic benefits at a large scale by optimizing current agricultural production patterns. Our results suggest that together, both the local government and farmers can adjust the structure of agroforestry ecosystems to foster the sustainable development of the ecological industry in the karst region of China.

Multicriteria assessment of alternative cropping systems at farm level. A case with maize on family farms of South East Asia

Maize is one of the main crops in the world and in Brazilian agriculture; however Brazilian average actual yields are usually low and far from attainable yields. Yield gap (Yg) quantifies the differences between potential, attainable and actual yields, wherein climate variability represents an important role as also directly influences on crop management of rainfed systems. Yield gap studies are numerous worldwide, but are still scarce in Brazil. A study based on a simulation approach was carried out using the crop simulation model CSM CERES-Maize, part of the Decision Suport System for Agro-Technology Transfer (DSSAT). The model was utilized to assess climate-induced variability and yield gap of rainfed maize for the crop's yearly two growing seasons, during a period of 10-30 years, in six regions with economic importance on crop productionin Central-Southern Brazil. The model was calibrated using local hybrid trials (Ybf) for an early maturing hybrid. Reference yield levels, namely potential (Yp) and water-limited (Yw) yields were simulated for 30 growing seasons (1983-2013) using daily historical weather data and average crop management information. Using local farmers' average yields (Ya) from series of 10 to 20 years and reference yield levels, yield gaps (water-related yield gap -Cyg; and management yield gap -MYg were determined).The simulated experiments provided average Yp of 11.4-21.0 t ha -1 for 1 st season; 9.2-12.6 t ha -1 for 2 nd season and Yw of 10.7-18.6 t ha -1 for 1 st season; 7.7-9.9 t ha -1 for 2 nd season. Average yield gap due to water deficit (CYg) varied between3-51 % of total (0.2-4.9 t ha -1 ) for 1 st season and between 9-42 % of total (0.4-2.6 t ha -1 ) for 2 nd growing season. Average yield gap due to management (MYg) varied between49-94% of total (4.5-7.9 t ha -1 ) for 1 st season and between 58-91 % of total (2.0-3.8 t ha -1 ) for 2 nd growing season. These results indicate the importance of crop management to increase yields toward the maximum attainable in all studied regions. There is opportunity for increasing yields in almost all scenarios (regions vs. season). Opportunities for increasing yields to its biophysical limit imply that crop management performed with proper weather forecast will be indispensable for closing yield gaps.

Heavy rainfalls, between 25 and 100 mm·h–1, were simulated on Pliocene/Quaternary sediments. To reproduce the heterogeneity of natural environments, 231 small plots of various sizes (between 2.5 and 3.5 m2; mean: about 3 m2) were used. The duration of all simulations was 1 h. We used water that had been collected during natural rainfall. The concentration of clay particles in the sheet wash depended upon the concentration of dissolved sodium in the wash (for about 42%) and of the sheet wash quantity (for about 37%). Under natural water conditions colloidal matter, like clay minerals, is charged negatively and therefore is destabilized by metal cations such as in the case of Na+. Results suggest that relatively higher concentrations of montmorrillonite were related to higher concentrations of sodium as opposed to illite and kaolinite. Microflakes of up to 25 μ were observed to vary between face-to-edge and face-to-face modes (competition between protons and other cations). The concentration of dissolved sodium (Na+) in the runoff water depends on water and sodium balances such as atmospheric input, infiltration, evaporation and surface water runoff. The reduction of vegetation cover increases the amount of salt and amorphous matter in/on the topsoil between heavy rainfall generations. The best predictor to explain montmorillonite, illite and kaolinite in % of mineral clay-sized matter in the surface water runoff (sheet wash) is the percentage of each clay mineral in the topsoil. As opposed to illite and kaolinite, more sheet wash indicate for montmorillonite relatively higher concentrations in the wash. The results of model simulations were confirmed on different field plots of about 1 ha and small catchments during natural heavy rainfall events. Models can also be used to understand and to better simulate sheet, rill and gully erosion, micropedimentation; and pedimentation.

The local farmers have long implemented agroforestry systems, and many challenges are found in agroforestry practices. This study analyzed the plant species composition and local farmers' perceptions of agroforestry practices in Aceh and Java, Indonesia. We interviewed the local farmers and observed the species composition in the field. Most local farmers are in the 46-55-year-old age group (42%) with an elementary school education background (39%). Local farmers reported acquiring their agroforestry skills through self-experimentation. Most local farmers possess 2-5 years of experience. Only 29% of the farmers have participated in such groups or communities. Approximately 88% of local farmers have agrisilviculture as their preferred approach. They perceive their planted species' growth performance as in good condition (58%). The dominant tree species favored by local farmers are Tectona grandis, Falcataria falcata, Swietenia macrophylla, and Durio zibethinus. While in the realm of crops, the dominants are Manihot esculenta, Ipomoea batatas, Musa paradisiaca, and Capsicum annum. The main challenges faced by the local farmers are pest/disease attacks (43,9%), limited human resources availability (31,7%), and limited market (24,4%). The most needed in agroforestry practices are species selection (29,3%), cultivation techniques (24,4%), and irrigation systems (19,5%).

Agricultural development in Kinmen region has long suffered from the absence of a corresponding management unit responsible for irrigation planning and infrastructure maintenance, resulting in the majority of local farmlands relying on natural rainfall for cultivation. Unfortunately, this method is highly susceptible to the impacts of climate change. To address this pressing issue, the government plans to utilize reclaimed water from domestic sources as a supplementary irrigation resource. Within this context, this study aims to devise an irrigation water allocation model to optimally harness the limited water resources.In this study, we simulate the crop rotation of local sorghum and wheat, considering soil, crop, and historical meteorological data. We calculate the variations in crop yield under different irrigation schemes. Additionally, we use historical meteorological data from Kinmen to calculate various simulated climates, testing the benefits of this irrigation plan under more extreme weather conditions. In conclusion, guided by the simulation outcomes and considerations of factors like cost and government procurement prices, we undertake a comparative analysis of the economic benefits under various scenarios and irrigation plans. This analysis aims to pinpoint the optimal irrigation water allocation plan that can be feasibly implemented by local farmers.For this study, we have chosen a 100-hectare demonstration area located in Jinsha Town, Kinmen, as our study area. We will utilize 750 tons of reclaimed water provided daily by the Ronghu Water Resources Recycling Center as the irrigation water source, and the government has already established six agricultural ponds in the area to store water. Following this, our study will proceed with the implementation of the irrigation water allocation plan in the designated demonstration area. Our ultimate aim is for this initiative to serve as a starting point, enabling the systematic expansion of the irrigation water allocation plan to other regions in Kinmen, thereby enhancing the overall irrigation quality.Keywords: Irrigation Water Allocation Model; Reclaimed Water; Rotation Irrigation; Kinmen; Sorghum

Background. Saltwater intrusion poses a significant threat to agricultural productivity in coastal regions, particularly in Tovuni Kiungoni, Zanzibar, where Saro Rice Farming is a vital economic activity. This study investigated the effects of increasing salinity on rice cultivation, focusing on changes in soil salinity, crop yield, and farmer adaptations.  Methodology. Through field surveys, soil sampling, and interviews with local farmers, the research identifies key contributors to escalating salinity in irrigation water, including rising sea levels and unsustainable water management practices.  Results 34% of the respondents were aged 60 years and above, and Females dominated the study at 62%. The findings reveal that elevated levels of sodium (Na⁺) and chloride (Cl⁻) ions exceed thresholds for optimal rice production, causing osmotic stress, reduced germination, stunted plant growth, and lower yields. Additionally, soil sodicity degrades soil structure, reduces infiltration, and exacerbates these challenges. Farmers have adopted strategies such as salt-tolerant rice varieties, improved irrigation techniques, and leaching practices, but their effectiveness is hindered by limited resources and knowledge.  Conclusion. Elevated levels of sodium and chloride in irrigation water not only reduce the osmotic potential, making it difficult for crops to absorb water but also lead to soil degradation through sodicity. These effects ultimately compromise crop yields and agricultural sustainability in the region.  Recommendation. There is an urgent need for integrated water resource management, sustainable agricultural practices, research on resilient crop varieties, and enhanced support systems to bolster farmer resilience. Collaborative efforts among stakeholders are essential to safeguard Saro Rice Farming, ensure food security, and address the growing impacts of climate change and environmental degradation in the region.

Plants and humans cannot easily acquire iron from their nutrient sources although it is abundant in nature. Thus, iron deficiency is one of the major limiting factors affecting crop yields, food quality and human nutrition. Therefore, approaches need to be developed to increase Fe uptake by roots, transfer to edible plant portions and absorption by humans from plant food sources. Integrated strategies for soil and crop management are attractive not only for improving growing conditions for crops but also for exploiting a plant’s potential for Fe mobilization and utilization. Recent research progress in soil and crop management has provided the means to resolve complex plant Fe nutritional problems through manipulating the rhizosphere (e.g., rhizosphere fertilization and water regulation), and crop management (includes managing cropping systems and screening for Fe efficient species and varieties). Some simple and effective soil management practices, termed ‘rhizosphere fertilization’ (such as root feeding and bag fertilization) have been developed and widely used by local farmers in China to improve the Fe nutrition of fruit plants. Production practices for rice cultivation are shifting from paddy-rice to aerobic rice to make more efficient use of irrigation water. This shift has brought about increases in Fe deficiency in rice, a new challenge depressing iron availability in rice and reducing Fe supplies to humans. Current crop management strategies addressing Fe deficiency include Fe foliar application, trunk injection, plant breeding for enriched Fe crop species and varieties, and selection of cropping systems. Managing cropping systems, such as intercropping strategies may have numerous advantages in terms of increasing Fe availability to plants. Studies of intercropping systems on peanut/maize, wheat/chickpea and guava/sorghum or -maize increased Fe content of crops and their seed, which suggests that a reasonable intercropping system of iron-efficient species could prevent or mitigate Fe deficiency in Fe-inefficient plants. This review provides a comprehensive comparison of the strategies that have been developed to address Fe deficiency and discusses the most recent advance in soil and crop management to improve the Fe nutrition of crops. These proofs of concept studies will serve as the basis for future Fe research and for integrated and optimized management strategies to alleviate Fe deficiency in farmers’ fields.

Integrated crop management practices can improve rice (Oryza sativa L.) grain yield, but the effects of such practices on dry matter accumulation and photosynthetic productivity are inconsistent and not well understood. The primary objective of this study was to investigate the effects of integrated crop management practices on dry matter accumulation and redistribution, photosynthetic production, and yield of rice in northeast China. Medium‐ and high‐yielding potential japonica rice cultivars were grown using four crop management practices, including no N application (N0), local farmers’ cultivation practice (FP), high‐yield cultivation practice (HYP), and super‐high‐yield cultivation practice (SHYP). The increases in average yield with the HYP and SHYP treatments were 16.87 and 36.70%, respectively, in 2017 and 14.70 and 31.05%, respectively, in 2018, compared with FP. Increases in effective panicle number and spikelet number per panicle were the main reason for the increase in yield under the integrated crop management treatments. Compared with FP, the HYP and SHYP treatments significantly increased the population dry matter by 26.40 and 56.64%, respectively, before the heading stage. Relative to N0 and FP, HYP and SHYP significantly increased the dry matter export, export rate, and translocation rate in the leaves, stems, and sheaths and significantly increased the photosynthetic potential throughout the growth stage and the net assimilation rate after the tillering stage. These increases were critical for improving the quality of rice and achieving higher yields. Our study provides a theoretical basis for the development of high‐yield cultivation methods for rice in northeast China.

This study applied the Analytic Hierarchy Process (AHP) to determine the priority criteria for sustainable tourism development in Peștera Village, focusing on six essential areas: Environmental Sustainability, Economic Benefits, Cultural and Social Preservation, Infrastructure and Accessibility, Tourism Experience and Satisfaction, and Policy and Regulation Compliance. The AHP analysis demonstrated that Environmental Sustainability emerged as the top priority, emphasizing the need for tourism practices that preserve the village’s natural environment and ecosystems. Economic Benefits closely followed, highlighting the community’s recognition of tourism as a crucial driver for local economic growth, job creation, and income generation. The combination of these two criteria indicates a clear alignment between ecological preservation and the village’s economic aspirations, which are both fundamental to achieving long-term sustainable development. This research contributes to an improved understanding of sustainable practices in mountain tourism, offering insights applicable to similar tourism regions. By aligning environmental, economic, and cultural priorities, this study supports the development of comprehensive policies aimed at fostering resilience and sustainability in mountain tourism destinations worldwide.

Loss of nitrogen and phosphorus from farmland runoff and the interception effect of an ecological drainage ditch in the North China Plain—A field study in a modern agricultural park

With the growing global awareness of the requirement for sustainable development, economic development is no longer the sole objective of business activities. The need to find a balance between environmental impacts and economic benefits is especially the case for airport operations in or around cities. This study measured the environmental costs and economic benefits and of an airport for a period of 10 years, using Taipei Songshan Airport for the empirical analysis, to examine whether the environmental costs could outweigh the economic benefits. Of all the environmental negative side effects, aircraft engine emissions and noise nuisance are considered the main sources of environmental impacts. The dose-response method and the hedonic price method, respectively, were used for estimating the social costs of these. Income generation from both direct and secondary employment is measured as economic benefits by applying the Garin-Lowry model, originally developed in 1966, for estimation of the employment multiplier. The results show that, in general, the operation of Taipei Songshan Airport brought more economic benefits than environmental costs. The sensitivity analysis of emissions and noise social cost parameters shows that the environmental costs might have exceeded the economic benefits in 2008 and 2009 in certain high emissions and noise social cost cases.

The trial was conducted over a period of 10 years (1993/94 to 2002/03) on a medium-textured soil in a Chardonnay/99 Richter vineyard near Stellenbosch (33°55’S, 18°52’E), which is situated in the Coastal wine grape region of the Western Cape, South Africa. Sixteen treatments, consisting of three cereals and five legumes, managed according to two cover crop management practices, were included. These treatments were compared to a control, in which no cover crop was sown and the weeds were controlled mechanically in the work row and chemically in the vine row from bud break to harvest (approximately the first week of February). A treatment in which no cover crop was sown and full-surface post-emergence chemical weed control was applied from before bud break to harvest (BB) (weedchem) was also included. After five seasons, the soil organic matter (SOM) content in the 0 to 300 mm soil layer increased in all the cover crop management treatments. In weedchem and in the control, SOM remained unchanged and decreased by 16% respectively. The SOM content in the 0 to 150 mm soil layer of the cover crop treatments was, with the exception of Vicia dasycarpa Ten. (grazing vetch), significantly higher than that of the mechanically-cultivated control after a period of 10 years. The SOM content in the 0 to 300 mm soil layer of Secale cereale L. v. Henog and the treatments in which the N-fixing cover crops were sown (with the exception of grazing vetch) was significantly higher than that of weedchem. The total inorganic N (TIN) concentration of the 0 to 150 mm soil layer in the BB treatments of the two Medicago species and Trifolium subterraneum L. v. Woogenellup, as measured for the 1996/97 season during full bloom of the grapevines, was significantly higher than that of the control, weedchem, and the treatments in which full-surface chemical control was applied after bud break (AB). The TIN concentration of the 0 to 600 mm soil layer in the AB treatment of a species, measured after harvest in 2002/03, tended to be higher than that of the BB treatment of that species. The applied treatments had no significant effect on the exchangeable K, Ca and Mg.