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Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper is based on the reconstruction project of south section of National Highway No.310 (Xingyang Qiaolou-Cuimiao section) in Zhengzhou of National Highway No.234, which involves the construction of an overpass for National Highway No.234 to cross over Zhengzhou- Xi'an High-speed Railway. The main focus of this paper is to analyze the key and difficult points in the design of the foreign object intrusion monitoring system for the project and propose solutions. This project is the first foreign object intrusion monitoring system design for the operating high-speed railway overpass within the jurisdiction of Zhengzhou Bureau, providing reference and experience for the design and construction of similar projects in Henan and even throughout the whole country of China in the future. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The paper used the location entropy index, spatial gini coefficient and barycenter model to analyze the temporal and spatial changes of Chinese animal husbandry industry agglomeration from 2002 to 2021. On this basis, the fixedeffects model was constructed to explore the influencing factors of the animal husbandry industry agglomeration. The results showed that from 2002 to 2021, the agglomeration degree of Chinese animal husbandry industry exhibited a continuous upward trend. The focus of the animal husbandry industry agglomeration had been concentrated in Henan and Sichuan for a long time. The animal husbandry industry gradually gathered from the eastern to the central region. The technology input, industry correlation, economic development level and policy environment all had a positive impact on the animal husbandry industry agglomeration, while the number of labor force had no significant impact on the animal husbandry industry agglomeration. Therefore, the paper puts forward some suggestions to accelerate the clustered development of animal husbandry industry, stimulate the shift of high-qualitanimal husbandry industry elements to the centralregion, and strengthen the policy support for the animal husbandry industry agglomeration, so as to provide a reference for promoting the high-quality development of animal husbandry industry. [ABSTRACT FROM AUTHOR]

[Objective] Soil organic carbon (SOC) is not only an indicator of soil health but also plays a crucial role in feedback interaction between global warming and carbon stock in terrestrial ecosystems. Its dynamics is modulated by a multitude of interactive abiotic and biotic factors. In this paper, we analyze the spatial distribution of SOC in the plough layer and its correlation with soil texture and other geochemical properties in the region of Zhengzhou in Henan province. [Method] Soil samples were taken from a grid network in the region. SOC, bulk density, soil texture and other geochemical properties in each soil sample were measured. The correlation between SOC and soil nutrients, including nitrogen, phosphorus, potassium and micronutrients in the soil, was analyzed using the GeoChemStudio software. [Result] The calcareous skeletol soil in the region has the highest SOC, reaching 2.307%. The SOC content varied from 0.1%-11.6% across the region, and was normally distributed with a mean of 1.134%. The SOC was positively correlated with N, P2O5, Fe, Mn, Zn, Cu, Mo and B, and their associated correlation coefficients were 0.804 5, 0.223 0, 0.156 3, 0.119 1, 0.223 8, 0.263 4, 0.162 8 and 0.191 1, respectively. Negative correlations were found between SOC and K2O and pH, and their associated correlation coefficients were -0.088 8 and -0.195 7, respectively. The average SOC content in the plough layer in the region was 1.09%. Spatially, SOC was rich in Xinmi, Dengfeng and Gongyi in the southwest of the region. In terms of soil texture, SOC is higher in skeletol soil and calcareous cinnamon soil than in other soils. SOC stored in the topsoil in the whole region was 1 012.87x104 t, with 523.13x104 t stored in the cinnamon soils and calcareous cinnamon soils, accounting for 51.64% of the total topsoil SOC in the region. [ABSTRACT FROM AUTHOR]

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] Soil salinization due to shallow groundwater table is a main abiotic stress facing agricultural production in eastern Henan province. In this paper we analyze the migration of salt in the plough layer and its relationship with geochemistry of both surface water and groundwater at different seasons. [Method]The experiment was conducted in areas adjacent to the National Agro-ecological System Observation and Research Station of Shangqiu. We measured salt content, depth of groundwater table, as well as surface water runoff from 2010 to 2020. The relationship between salt content and these environmental factors was calculated using the descriptive statistics and Piper figure analysis method.[Result]The increased salt content in the top 0~20 cm soil layer was mainly induced by the increased precipitation. The maximum electric conductivity of the topsoil layer occurred between October and November, but it is linearly correlated to precipitation in August (y=0.794 3x+126.65, R2=0.631 3, P<0.05). The content of Ca2+, Mg2+, Na+, HCO3 -, SO4 2-, Cl- and electric conductivity of water in the topsoil layer and the 0~100 cm soil layer, as well as depth of the shallow groundwater table in 2020 was significantly higher than those in 2015 (P<0.05). We also found that the leachate from the topsoil was geochemically similar to that of the shallow groundwater and the surface runoff in 2020, indicating that the soluble salt in the topsoil was related to both surface water and subsurface water.[Conclusion]The electric conductivity of water in the topsoil layer and the 0~100 cm-depth soil layer in October was both positively correlated to precipitation and the depth of the groundwater table, suggesting that salt in the topsoil was hydraulically connected to soluble salt in the surface water and the subsurface water. [ABSTRACT FROM AUTHOR]

The Yangtze River to Huai River Diversion Project spans two major river basins, the Yangtze River and the Huai River. It is a major cross basin water transfer project that alleviates local water resource shortages, improves project benefits, and supplies water to the Henan section. In the case of unknown water supply and demand sides in the Yangtze River to Huaihe River Diversion Project, the water volume at the head of the channel is reversely optimized by using the regulation and storage capacity of Caizi Lake, Chaohu Lake, and Wabu Lake, and the water intake process at the diversion outlet is forward optimized. A simulation model and a bidirectional optimization model are layered and coupled, and a medium and long-term water volume scheduling model for the Yangtze River to Huaihe River Diversion Project is constructed based on the principle of water balance. A typical annual scheduling scenario set is constructed based on the water inflow situation and water demand. Based on the water inflow forecast results of various lakes in different level years, the water demand process at the entrance and engineering constraints, a differential evolution algorithm with adaptive parameter correction mechanism and a stepwise optimization algorithm are used to solve the problem, in order to formulate the annual water volume scheduling plan for the Yangtze River to Huaihe River Diversion Project. This paper takes the 2030 planning level year of abundant water as an example to compare and analyze the layered coupling water scheduling model and the conventional optimization scheduling model. Due to the layered coupling water scheduling model optimizing the lake regulation and storage process and constraining the lake water level, the model has better effects in terms of river diversion water volume, water shortage in water receiving areas, and lake utilization. The results show that on the basis of meeting the water use plan of the diversion gate, the model reduces the lake' s abandoned water volume, and the deviation value of the lake' s end water level is small. The daily water level variation is guaranteed to be within 0.1 m, and the lake is in a high water level operation state. The annual water volume scheduling plan obtained from this model can effectively utilize local water resources, improve water resource utilization efficiency, and provide technical support for the operation scheduling and scheduling plan preparation of the Yangtze River Diversion to Huaihe River Project . [ABSTRACT FROM AUTHOR]

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Farmers' green production transformation can ensure the quality and security of agricultural products to a certain extent and alleviate the pressure of the agricultural environment. It is essential to understand the impact of socialized agricultural services on the degree of farmers' green production transformation. Based on 1018 survey responses of farmers in Henan, Shandong, and Shanxi provinces, this paper used the finite mixture model to calculate the degree of farmers' green production transformation and used the propensity score matching (PSM) model to construct the counterfactual hypothesis to estimate the average processing effect and heterogeneity of socialized agricultural services on the degree of farmers' green production transformation. The results showed that: 1 The production mode of wheat growers could be divided into traditional production mode and green production mode. The proportion of wheat growers engaged in green production accounted for 20.33%; their fertilizer application was reduced by 363.35 kg/hm², and their pesticide cost was reduced by 418.73 yuan/hm². 2 Fertilization services and plant protection services could significantly promote the wheat growers' green production transformation, and their average treatment effects were 0.109 and 0.152, respectively. Compared with fertilization services, plant protection services promoted wheat growers' green production transformation to a greater extent. After farmers purchased fertilization services and plant protection services, the corresponding chemical input costs per hectare were reduced by 204.06 yuan and 284.56 yuan, respectively. 3 The impact of socialized agricultural services on farmers' green production transformation was significantly heterogeneous. The average treatment effect on green production transformation was more significant for part-time farmers and farmers trained in agricultural technology who purchased the services. Therefore, we should vigorously cultivate the socialized agricultural service market, strengthen the support for such services in different sectors, guide farmers with different endowments to reasonably purchase such services, and promote farmers' green production transformation. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The traditional design flood estimation method assumes that the flood peak and the flood volume are at the same frequency, without considering the correlation between the two flood characteristics. Furthermore, when the design flood region composition under a specific return period is estimated, although the traditional method is from the most unfavorable point of view, it is impossible to quantitatively describe the correlation between the floods in each subarea. Therefore, in this paper, Copula function is used to deduce the design flood peak and flood volume at different frequencies which consider the combined effects of flood peak and flood volume, and then obtains the design flood process at different frequencies. The marginal distribution of flood components in each area is established and the most suitable Copula function between components in each area and design section is preferred which consider the spatial correlation between each flood zone and Huayuankou section, and then explore the most likely design flood region composition. It shows that the design results obtained by considering the correlation between flood elements in this study are slightly higher than those deduced by traditional methods under the same return period. The method in this paper can qualitatively and quantitatively describe the design flood region composition in the study area so as to obtain the design flood results that consider both the correlation of flood characteristics and spatial correlation at the same time, which are more objective and more consistent with the actual situation of design flood region composition in the basin. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Yangtze Normal University is the property of Journal of Yangtze Normal University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Yangtze Normal University is the property of Journal of Yangtze Normal University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Test & Measurement Technology is the property of Publishing Center of North University of China and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Natural Resources / Ziran Ziyuan Xuebao is the property of Journal of Natural Resources and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Fly Ash Comprehensive Utilization is the property of Hebei Fly Ash Comprehensive Utilization Magazine Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] The present paper aimed to explore the grain production pattern and influencing factors in the major production areas, provided a certain basis for stabilizing the overall situation of national food security and formulating differentiated grain policies. [Method] By means of concentration degree, gini coefficient, logarithmic mean divisia index and cultivated land pressure index, quantitatively analyzed the factors influencing the increase of grain production in major grain producing areas from 2000 to 2020, such as the change of grain production center, variety structure, contribution to increase production, resource bearing capacity and production cost. [ Result] ( i) From the change of grain production center, more than 95 % of the grain increment came from the major grain producing areas, and the major producing areas in the north contributed more to the increase, especially Shandong, Henan and Heilongjiang, which occupied the top three areas of grain output and sown area for a long time. (ii) In terms of the production centers of different food crops, the production centers of wheat, com and beans were stable in the major grain producing areas in the north for a long time, while the production centers of rice and potato were mainly concentrated in the major grain producing areas in the south, but the production centers of rice gradually showed a trend of northward deviation. (iii) From the perspective of contributing factors, the grain increase in the major grain producing areas mainly depended on the increase of yield per unit area, and the contribution rate of yield per unit area to grain increase reached 61. 16%. The grain increase in the major grain producing areas in the north was due to the combined effect of cultivated land area, multiple cropping index, grain crop proportion and yield per unit area. Due to the decrease of cultivated land area in the major grain producing areas in the south had a negative effect on grain increase, the grain yield increase was more dependent on unit yield increase and multiple cropping index. (iv) From the perspective of resource carrying capacity of grain production, the dilemma of uneven distribution of water and soil resources has not been improved for a long time. The constraints of water resources in the major grain producing areas in the north were increasingly strengthened, while the pressure of cultivated land resources in the major grain producing areas in the south was continuously high. ( v) From the change and structure of grain production cost, the average grain production cost in the major grain producing areas was rising continuously. The land cost in the major grain producing areas in the north was higher, and the labor cost in the major grain producing areas in the south was higher. The grain production cost in the major grain producing areas in the north was higher than the whole country and the major grain producing areas in the south for a long time, and the rising rate was slightly faster than that in the major grain producing areas in the south. [Conclusion] Establishing the food security responsibility mechanism shared by the producing and marketing areas, constructing the differentiated compensation mechanism; Strictly observing the grain sown area, adjusting the structure of regional grain varieties; Consolidating scientific and technological support for grain increase, promoting coordinated development of water and soil resources and grain production; Taking multiple measures to improve grain production efficiency, and enhancing the enthusiasm of various subjects to grow grain. [ABSTRACT FROM AUTHOR]

:Drought has been a major natural disaster for mankind since ancient times. Even today, with the development of science and technology, the disastrous consequences caused by droughts are still everywhere. In this paper, the evolution characteristics of the drought and its correlation with circulation in Henan Province from 1970 to 2019 are analyzed by using the methods of standardized precipitation evapotrans- piration index (SPEI), Mann Kendall test and cross wavelet analysis. The results show that based on SPEI value, the climate in Henan Province has gradually become arid in recent 50 years. In terms of spatial variation, the drought in spring, summer and winter is significant in the northwest and relatively humid in the southeast. From the circulation correlation, the North Atlantic Oscillation (NAO), Arctic Oscillation (AO) and Southern Oscillation (SOI) have a strong correlation with droughts in spring, summer and autumn in Henan Province, and the Pacific Decadal Oscillation (PDO) and SOI have a strong inter-annual correlation with droughts in Henan Province. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Population Resources & Environment is the property of Shandong Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Population Resources & Environment is the property of Shandong Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to solve the picture fuzzy multi-attribute decision making problem with unknown attribute weights, this paper proposed a new picture fuzzy entropy and picture fuzzy weighted symmetric cross entropy for multi-attribute decision making method. Firstly, based on the cosine function, this paper proposed a new picture fuzzy entropy and verified that the entropy va-lue met the axiomatic definition of picture fuzzy entropy. Secondly, according to the picture fuzzy decision matrix after stan-dardization, this paper used the picture fuzzy entropy to determine the weight of each attribute, based on this, determined the positive and negative ideal alternatives at the same time. Thirdly, it calculated the picture fuzzy weighted symmetric cross entropy of each alternative with positive and negative ideal alternatives respectively. According to the decision maker’s subjective evaluation tendency, the ranking results of each alternative could be obtained by fuzzy compromise ratio. Finally, the selection of innovative projects in Zhengzhou area of Henan Pilot Free Trade Zone could illustrate the proposed method, and by using comparative analysis to verify effectiveness and rationality of the decision-making method. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

ICESat ‐2’s laser data has the highest elevation accuracy up to date, and its observation range covers the global land, which can be used as basic data for the high ‐ precision global ground elevation reference. Based on ICESat‐2 /ATLAS global laser data product ATL08, this paper obtained ICESat‐2 la‐ ser points on the global land, and studied the method of extracting global elevation control points based on elevation reference and attribute parameters, and used reference elevation data to verify their accuracy. The obtained laser points were verified by airborne laser data in Shandong experimental field and Henan experi‐ mental field in China. And the root mean square error (RMSE) were 1.11 m and 1.39 m respectively before filtering. After filtering with elevation reference and slope constraints, the mean RMSE were 0.69 m and 0.57 m respectively, and the corresponding data retention rates were 61.38% and 60.00%, which proved that the proposed method in this paper could effectively improve the elevation accuracy while ensuring the data retention rate. The airborne laser data from the western, central and eastern United States experimen‐ tal fields were used to verify the elevation control points. The RMSE of each experimental field was less than 0.9 m, which proved that the extraction method proposed in this paper could be used to extract eleva‐ tion control points worldwide. This method can automatically extract global elevation control points with high density and high precision, providing support for the stereo mapping of domestic high‐resolution satel‐ lites without or with few ground control points, and assistance in evaluating the quality of DEM/DSM products. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to scientifically quantify the development level of digital countryside, effectively promote the comprehensive and organic integration of modern information technology and rural areas, and help rural revitalization.【Method】Based on the latest research results and practical research, and the panel data of 18 prefectures and cities in Henan Province during 2014-2021, 20 indicators were selected from four dimensions: rural digital information basis, new business forms of rural digital economy, agricultural digital transformation, and digitalized rural life, to construct an evaluation index system for the development level of digital countryside. Methods such as entropy weight method, TOPSIS method, Kernel density estimation, Theil index and Moran’s I were comprehensively used to measure the development level of digital countryside in Henan province, and analyze its regional differences and spatial-temporal evolution.【Result】(i) From the perspective of development level, during the investigation period, the development level of digital countryside in Henan province showed an increasing trend year by year. Although the overall development level was not high, the sustainable development momentum was strong.(ii) From the perspective of regional differences, the overall difference of the development level of Henan digital countryside showed a trend of steady decline. Among them, the regional differences contributed the most to the overall differences, and the differences between Central Plains urban agglomeration and Huang-Huai region were the most obvious. The intra-regional differences showed a decreasing trend of Central Plains urban agglomeration, western Henan southwestern Henan, northern Henan and Huang-Huai region.(iii)From the perspective of spatial-temporal evolution, there was an obvious and stable positive correlation among the four economic zones. The Central Plains urban agglomeration was mostly high agglomeration, while the Huang-Huai area was basically low agglomeration. 【Conclusion】The development of digital countryside in Henan province should be combined with provincial conditions and regional characteristics to lay out comprehensively, promote overally, develop stably, bridge the gap, and improve rapidly. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Central China Normal University is the property of Huazhong Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

(Objective) Bioavailable water and nutrients to crops depend not only on root architecture but also on how water and nitrogen fertilizer are applied. In this paper, we investigated the effects of irrigation and fertilization on water and nitrogen dynamics in soil of a winter wheat field under border irrigation.(Method) The experiment was conducted in a wheat field in Henan province, where changes in water and nitrogen in soil under border irrigation were measured. These data were used to validate the HYDRUS-1D model, and the validated model was then used to elucidate how a change in irrigation and fertilization modulates water and nitrogen dynamics in the root zone of wheat under border irrigation. (Result) The HYDRUS-1D model simulated water and nitrogen dynamics in the root zone well. The coefficient of determination (R2) between the simulated and measured data was greater than 0.84, with its associated RMSE and MAE less than 0.807 and 0.695, respectively. Increasing the low critical soil water content for resuming irrigation moved nitrate in the top 0~20 cm soil layer to 20~100 cm soil layer 1~2 days after the irrigation, but it did not show significant effects on ammonium dynamics in the soil. Increasing nitrogen fertilization increased nitrate and ammonium nitrogen in the 0~60 cm soil layer significantly, especially in the 0~40 cm soil, but reduced water content in the 0~40 cm soil layer. (Conclusion) The HYDRUS-1D model is able to simulate water and nitrogen movement in soil under border irrigation, and the simulated results can help to improve irrigation and fertilization management for wheat production in the studied and similar areas. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)