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Background: Several coastal regions in Vietnam have been suffered from salinity intrusion as a consequence of global climate change. However, there are limited studies on saline intrusion in Vietnam. This paper aimed to investigate the salinity intrusion of water and soil samples in paddy fields along Tam Giang lagoon, Thua Thien Hue province and clarify the factors affecting the salinity level. Methods: We measured the salinity concentrations (EC, Electrical conductivity) of water and soil samples in paddy fields at different distances (400, 600, 800, 1000 and 1200 m) from Tam Giang lagoon. The multiple regression analysis was performed to figure out the factors affecting the salinity concentrations. Result: The salinity concentrations of water were assessed as 48% high saline (10-25 dS m-1), 34% moderately saline (2-10 dS m-1), 2% slightly saline (0.7-2 dS m-1) and 15% non-saline (<0.7 dS m-1). As for surface soil in paddy field, 14.3% moderately saline (4-8 dS m-1), 35.4% slightly saline (2-4 dS m-1) and 50.3% non-saline (0-2 dS m-1) were measured. A significantly positive correlation was found between salinity concentrations of water and soil (n=175, r=0.886, p<0.01). The distances from salinity sources, Tam Giang lagoon and shrimp pond, were major factors affecting the salinity concentrations. The paddy fields near Tam Giang lagoon and shrimp pond have higher salinity concentrations compared to those areas close to the residential area. The surface water in the paddy field within 1000 m from the salinity source was assessed as saline that might harm the paddy soil and rice production. The results of this study provide highly useful information for local policymakers and farmers about the status of salinity intrusion in paddy land. [ABSTRACT FROM AUTHOR]

Agriculture in the Czech Republic is one of major sectors of the economy, as it provides a substantial share of the basic food requirements of the population. An important part of agricultural companies' production consists of livestock, especially because of the effective use of crop production as a source of all kinds of animal feed. It is also proven that livestock production plays a significant role in the creation and cultivation of the landscape. Czech agriculture has shown a profit since joining the EU thanks to a significant increase in subsidies. The aim of this paper is to show the impacts of the globalization of the economy and climate change on the economic performance of agricultural companies in the Czech Republic. Serious consequences of global climate change are already evident, and their intensity will grow with the ongoing warming of the planet. [ABSTRACT FROM AUTHOR]

Endowment of fertile Gangetic alluvial soil and abundant water resources, particularly groundwater resources altogether constitute core components for development of agriculture in Bihar. Efforts have been made in this paper to analyze factors responsible for changes in land use pattern, especially increase in current fallows, shrinking net sown area and shifting of land for non-agricultural purposes in the state. A larger concentration of current fallow lands was accounted for in Gaya, Patna, Purnea, Munger, Jehanabad and Kishanganj districts. The rainfall and road length have significant impact on the level of current fallows. Erratic monsoon and labour scarcity during the study period of present century resulted in accumulation of current fallow lands. It was further observed that the non-agricultural use of land was identified as the dominant factor for changes in common lands as it affected the current fallows negatively. It is a challenging task for policy makers to maximize the income of farmers from a continuously declining in net sown area, deteriorating climatic conditions as well as labour scarce conditions, thereby resulting in aggregation of current fallows. In order to boost the production and enhance farmer's income, it is necessary to discourage the rising tendency in current fallows or to bring current fallows under cultivation. [ABSTRACT FROM AUTHOR]

At present, climate change is one of the most challenging environmental issues as it poses potential threat to different sectors of economy at global level. Agriculture being an open activity is primarily dependent on climatic factors and change in climatic conditions affects the production, quality and quantity of crop production in an area. This paper attempts to study effects of only two parameters of climate i.e. temperature and rainfall on agricultural production in northwest region of India. Northwest region comprising of Punjab, Haryana, Himachal Pradesh and Jammu Kashmir states is the greatest food bowl of India contributing to its food security. The analysis of mean monthly rainfall and maximum and minimum temperatures (1901-2006) shows no significant change in temperature and rainfall conditions from 1901 to 1960; but afterward the change is more pronounced. On the whole any significant change in climatic conditions will not only challenge the food production of the region but also challenge the country's food security situation. [ABSTRACT FROM AUTHOR]

The study examined perceptions and adaptations to climate variability and change in subsistence agriculture. A multi-stage random sampling technique was employed to elicit information from 90 respondents. Data were collected through a well-structured questionnaire. Data analysis involved the use of descriptive statistics and Ordinary Least Squares techniques. Perception of farmers on long-term changes in temperature revealed that 24.62 percent of the perceived temperature to be on the increase while 18.10 percent perceived rainfall to be on the increase. The number of farmers who have not noticed changes in temperature and precipitation were few 3.04 per cent and 4.89 per cent respectively. In specific terms, 11.74 per cent of the respondents adopted the use of different varieties in response to changes in climate while the use of irrigation (3.12 per cent) was the least adopted strategy. The regression result showed that farming experience and access to credit were the significant variables determining adaptation. [ABSTRACT FROM AUTHOR]

Agriculture in Bundelkhand region is highly vulnerable to risks and uncertainties. Marginal and small farmers among all farm groups are most vulnerable to the effects of climatic variability. The impact of extreme weather events and natural resources on which farmers are dependent aggravates their vulnerability. The present study uses field surveyed data and IPCC- vulnerability approach, to assess the livelihood vulnerability status of two districts of Bundelkhand region, India. Data was collected using a multistage sampling technique including 200 households. The study concluded that 90% of farmers perceived (exposed) that Kharif season remained hotter and frequencies of droughts have increased over the last five years. Sample households were also highly sensitive due to lack of basic amenities. The lower adaptive capacity due to agriculture as a sole income source, lack of non-farm employment opportunities, monoculture and income diversification and illiteracy are responsible for livelihood vulnerability in the region. From the policy perspective, water conservation through rainwater harvesting, construction of new ponds and check dams would be a possible solution to the present water crisis in the region. [ABSTRACT FROM AUTHOR]

This study is conducted to determine the appropriate irrigation water amount for three main cropping seasons (TMCS) of rice in the Long Xuyen Quadrangle, Vietnam (LXQ). In the work, the Cropwat crop model was used to calculate irrigation water amount for winter-spring (WS), summer-autumn (SA) and autumn-winter (AW) crops based on meteorological data collected in period from 1998 to 2017. Simulation results carried out that WS crop was needed more irrigation water than SA and AW crops. The highest irrigation water requirement (IWR) of WS, SA and AW crops occurred on development stage with approximately values 207.1 mm, 205.8 mm and 102.3 mm respectively. The results showed that the proposed model is successfully applied to define crop water requirement (CWR) and irrigation requirement in the context of climate change leading to irrigation water scarcity. [ABSTRACT FROM AUTHOR]