Trade of Heilongjiang Province (China) with Russia

Local trade between the Far East region of the USSR and the Northeast region of the People’s Republic of China started in 1957, arranged by the public trade organizations in the respective borderlands. Heilongjiang Province of China has been the main actor in trade with the Far East region of the USSR, and more recently, Russia. After 1957, Heilongjiang Province’s trade with the Russian Far East developed rapidly until 1993, except a period of interruption (1967-1982). Thereafter, the Heilongjiang Province’s trade with the Russian Far East underwent a stagnation period (1994-1998), a recovery period (1999-2001), a rapid development period (2002-2007) and a period of change of tendencies and radical decrease (2008-2009). Heilongjiang Province’s trade with the Russian Far East consists of three main forms: general trade, Chinese-style border trade (Bianjing Trade which includes Bianjing Small Trade and trade between private persons (Hushi Trade)) and Travel Trade. The rapid increase of Heilongjiang Province’s trade with the Russian Far East from 2002 to 2007 is mainly attributable to the increase in the export of ordinary consumer goods, especially textile clothing and footwear, and to Bianjing Small Trade.

Development of land rental market and its effect on household farming in rural China : an empirical study in Zhejiang Province

This paper investigates the impact of land rental market development on the efficiency of labor allocation and land utilization in rural China. To test the hypothesis that the shadow wage of a rent-in household with limited off-farm opportunities will increase with the development of a land rental market for households, a statistical comparison between the shadow wage and the estimated market wage was conducted. The results showed that the shadow wage for both rent-in households and non-rent-in households was significantly lower than the market wage, but that the wage for the rent-in households was statistically higher than that for non-rent-in households in Fenghua and Deqing, the two counties surveyed in this study. In addition, the estimated marginal product of farmland for rent-in households was statistically higher than the actual land rent that those households paid, while a null hypothesis that the actual rental fee accepted by rent-out households is equivalent to the marginal product of farmland for those households was not rejected in Fenghua county where land transactions by mutual agreement were more prevalent. These results indicate that the development of the land rental market facilitates the efficiency of labor allocation and farmland utilization in rural China.

Effects on the shallow aquifers by CO2 leakages in a tertiary basin (province of Murcia, Spain)

Geological storage of CO2 is nowadays internationally considered as the most effective method for greenhouse gas emission mitigation, in order to minimize its effects on the global climatology. One of the main options is to store CO2 in deep saline aquifers at more than 800m depth, because it reaches its supercritical state. Study of the CO2 natural accumulations as natural analogues of an artificial CO2 storage is very useful in order to understand the CO2 long term behaviour and thus to predict its possible impact on the surficial environment and life. Therefore the main objective of this work is to detect the affection of the CO2 leakages from a deep saline aquifer on the shallow aquifers, all of them located in the Gañuelas-Mazarrón Tertiary basin (Province of Murcia, Spain). This CO2 storage and leakage natural system can be analogous to an artificial CO2 storage with leakage phenomena. In order to reach these objectives, groundwaters from different aquifers in the site have been sampled and analysed for major elements, free and dissolved gases and stable isotopes, particularly ∂ 13 C and 3 He/ 4 He. The results obtained allow to conclude that this natural system is an interesting example of natural analogue for an artificial CO2 storage affected by leakage processes because the shallow fresh aquifers in the site are polluted by CO2 from the deep saline aquifer as a consequence of an intensive over-exploitation of these freshwater aquifers