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Showing items 1 through 9 of 141.
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Library Resource
China has a large area of inland saline-alkali land, equivalent to 40% of the total cultivated land in the country. The principal features of these lands are high salt content, high pH, and poor soil structure with low water infiltration and poor drainage. These conditions effectively prevent the exploitation of such land for agriculture. In this study, we have compared 17 soil conditioning agents for their abilities to promote seed germination and growth under both laboratory and field conditions.
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Library Resource
China, India, Philippines, Asia
Rice, a staple food for over 70% of Asians, is also the single biggest user of water, requiring 2-3 times more input (irrigation plus rain) water per unit of grain produced than crops such as wheat and maize. With growing populations, increased urbanisation and environmental degradation, the supply of fresh water is depleting. Recognising the water constraints to rice yield, the aim of the project entitled ‘Developing a System of Temperate and Tropical Aerobic Rice (STAR) in Asia’ was to develop water-efficient aerobic rice technologies.
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Library Resource
Conference Papers & Reports
Chinas’ successfully increased food production during the last 30 years has causedsignificant negative external impacts and subsequent escalating environmental costs (Ashand Edmonds, 1998). This dilemma has recently become a popular issue and thegovernment attaches great importance towards a more sustainable agricultural production(UNDP, 2006).
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Library Resource
This Amendment to the Farmland Readjustment Act revises the provisions for the announcement and implementation or modification of Farmland Readjustment Plan (art.7) , and compensation (art. 31-32).
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Library Resource
Decreasing the damage rate of residual trees during selective cutting operations is quite important for forest landowners to reduce wood production waste and to use forest resources sustainably. In this article we analyze the impacts of chain saw selective felling operations on the damage rate of residual trees during winter in a mixed conifer-road-leaved forest. A case study was conducted in Dongfanghong Forest Farm located in northeast China.
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Library Resource
In recent years, in line with China’s Going Out strategy announced in 2000, China’s overseas investment activities have increased greatly and at increasing rates. By the end of 2009, the total value of China’s outward foreign direct investment had reached US$5.6 billion. Policies have played strong supporting roles in bringing about this trend by facilitating and encouraging Chinese companies to make overseas investments. This working paper summarises these policies based on an analysis of policy changes over time and identifies the main drivers of these changes.
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Library Resource
This study aims to assess CO₂ levels in China, based on the dry air column-averaged mixing ratios of CO₂ measured by the Scanning Imaging Absorption spectrometer for Atmospheric CartograpHY (SCIAMACHY) instrument on board ENVISAT and emission inventories. A land cover and statistical data set, the Regional emission inventory in Asia (REAS), was also used in this study. The results show that the spatial variations of the CO₂ concentration in the whole of China are obvious, and with clear seasonal fluctuation during 2003–2005.
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Library Resource
According to the viewpoints of predecessors, we define the signification of development right of agricultural land and connotation of the price of development right of agricultural land as follows, the development right of agricultural land is to change the former use nature of agricultural land, so as to become the right of construction Use land; the price of development right of agricultural land refers to the price that is difference between the price of construction use land, and summation of the price of former agricultural land.
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Library Resource
Land is the fundamental income sources for farmers. However, farmers stay in disadvantaged state in the political, economic and social aspects. Their land is exploited and occupied, which facilitates the rapid development of economy, as well as brings the gap between the poor and the rich and the inharmonious disputes.
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Library Resource
This article applies a nonlinear machine learning method, support vector regression (SVR), to construct empirical models retrieving water quality variables using remote sensing images. Based on in situ measurements and high-resolution multispectral SPOT-5 (Satellite Pour l'Observation de la Terre) data, a fittest nonlinear function between input and output was obtained from this method, and SVR model parameters were selected automatically using a genetic algorithm (GA).
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