Bài tập thì hiện tại đơn (Present simple tense exercises) có đáp án Bài 1: Điền dạng đúng của độn... more Bài tập thì hiện tại đơn (Present simple tense exercises) có đáp án Bài 1: Điền dạng đúng của động từ vào chỗ trống
This paper discusses the control of rat pets through highlighting its population growth, ecosyste... more This paper discusses the control of rat pets through highlighting its population growth, ecosystem, types and possible mechanism to use. During extended periods of fallow, rice field rats tend to congregate in escape places (refuge regions) such as bushes, yards, or rice warehouses. Rice plants suffered damage equivalent to five times their feeding requirements when rats were present. Rats damage plants from the tiller stage to the maximal tiller stages by devouring the growth point and the soft base of the stem while leaving the other portions of the plant unharmed. Without intensive control efforts (since the start of MT1), the rat population density on MT2 is confirmed to be higher and poses a serious threat to the success of MT2 harvesting. In one rice growing season, there is one population peak so in the rice-paddy-fallow cropping pattern there are two (2) population peaks.
Based on the study of Kaminsky and Reinhart (1999), this paper studies and applies early warning ... more Based on the study of Kaminsky and Reinhart (1999), this paper studies and applies early warning systems of currency crises to the case of Vietnam from 1996 to 2014. Its results show that the currency crisis is signaled six times during the observed period. Several principal indicators of the currency crisis in Vietnam include increased import, decreased export, excess real M1 balances, low international reserves and deposit growth, high interest rate and credit growth, high domestic-foreign rate differential, and decreased real output. Hence, the Government and the State Bank of Vietnam should grant appropriate policies not only to control the money supply and interest rate, but also to stimulate the ability of capital mobilization of Vietnam's banking system and to facilitate export activities in the coming years.
The aim of this study was to evaluate if and how the previous land use (here: agriculture versus ... more The aim of this study was to evaluate if and how the previous land use (here: agriculture versus forest) has influenced the floristic composition now observed in the understory of jack pine plantations of Abitibi-Temiscamingue (North-Eastern Canada). Floristic inventories were conducted in jack pine plantations which had been established on forest sites after logging and on sites previously utilized for agriculture. These were compared to one another and to inventories conducted in natural forests and on agricultural sites which had not (not yet) been planted with trees (old fields). The vegetation community composition of the sites is analysed using several multivariate techniques. Results show that the flora of plantations on old agricultural fields is markedly different than that of plantations established on sites which were previously forested and that the two types of plantation are unlikely to become floristically the same before the anticipated harvest time. Comparing old and young plantations and old fields in light of natural forests sites, we show that the previous land-use is a key determinant of future compositional differences in plantations. This must be considered when we evaluate the impact of establishing plantations on sites with different land-use histories.
The nonvascular and vascular plant composition of the early regenerating vegetation present follo... more The nonvascular and vascular plant composition of the early regenerating vegetation present following wildfires and clear-cut logging has been compared separately in three areas of the black spruce (Picea mariana (Mill.) BSP) - feathermoss (Pleurozium schreberi (Brid.) Mitt.)) forest of western and central Quebec. In each area, a detrended correspondence analysis successfully differentiated the burned and logged stands along the first ordination axis. This separation mainly resulted from the greater abundance of pioneer species or lichens after fire and the greater abundance of residual species after clear-cutting. Spearman's correlation coefficients were calculated to relate variables characterizing physical disturbance of the forest floor and general site conditions to the two first differentiating axes. Variables characterizing forest floor disturbance severity were strongly associated with the first ordination axis in two of the study areas but not in the third one. The inte...
Forest management in the boreal forests of Canada has evolved with changes in resource availabili... more Forest management in the boreal forests of Canada has evolved with changes in resource availability, in forest harvesting and information technology, in markets for forest products, in social values, and in our basic understanding of the boreal ecosystem. The proverbial ...
Bài tập thì hiện tại đơn (Present simple tense exercises) có đáp án Bài 1: Điền dạng đúng của độn... more Bài tập thì hiện tại đơn (Present simple tense exercises) có đáp án Bài 1: Điền dạng đúng của động từ vào chỗ trống
This paper discusses the control of rat pets through highlighting its population growth, ecosyste... more This paper discusses the control of rat pets through highlighting its population growth, ecosystem, types and possible mechanism to use. During extended periods of fallow, rice field rats tend to congregate in escape places (refuge regions) such as bushes, yards, or rice warehouses. Rice plants suffered damage equivalent to five times their feeding requirements when rats were present. Rats damage plants from the tiller stage to the maximal tiller stages by devouring the growth point and the soft base of the stem while leaving the other portions of the plant unharmed. Without intensive control efforts (since the start of MT1), the rat population density on MT2 is confirmed to be higher and poses a serious threat to the success of MT2 harvesting. In one rice growing season, there is one population peak so in the rice-paddy-fallow cropping pattern there are two (2) population peaks.
Based on the study of Kaminsky and Reinhart (1999), this paper studies and applies early warning ... more Based on the study of Kaminsky and Reinhart (1999), this paper studies and applies early warning systems of currency crises to the case of Vietnam from 1996 to 2014. Its results show that the currency crisis is signaled six times during the observed period. Several principal indicators of the currency crisis in Vietnam include increased import, decreased export, excess real M1 balances, low international reserves and deposit growth, high interest rate and credit growth, high domestic-foreign rate differential, and decreased real output. Hence, the Government and the State Bank of Vietnam should grant appropriate policies not only to control the money supply and interest rate, but also to stimulate the ability of capital mobilization of Vietnam's banking system and to facilitate export activities in the coming years.
The aim of this study was to evaluate if and how the previous land use (here: agriculture versus ... more The aim of this study was to evaluate if and how the previous land use (here: agriculture versus forest) has influenced the floristic composition now observed in the understory of jack pine plantations of Abitibi-Temiscamingue (North-Eastern Canada). Floristic inventories were conducted in jack pine plantations which had been established on forest sites after logging and on sites previously utilized for agriculture. These were compared to one another and to inventories conducted in natural forests and on agricultural sites which had not (not yet) been planted with trees (old fields). The vegetation community composition of the sites is analysed using several multivariate techniques. Results show that the flora of plantations on old agricultural fields is markedly different than that of plantations established on sites which were previously forested and that the two types of plantation are unlikely to become floristically the same before the anticipated harvest time. Comparing old and young plantations and old fields in light of natural forests sites, we show that the previous land-use is a key determinant of future compositional differences in plantations. This must be considered when we evaluate the impact of establishing plantations on sites with different land-use histories.
The nonvascular and vascular plant composition of the early regenerating vegetation present follo... more The nonvascular and vascular plant composition of the early regenerating vegetation present following wildfires and clear-cut logging has been compared separately in three areas of the black spruce (Picea mariana (Mill.) BSP) - feathermoss (Pleurozium schreberi (Brid.) Mitt.)) forest of western and central Quebec. In each area, a detrended correspondence analysis successfully differentiated the burned and logged stands along the first ordination axis. This separation mainly resulted from the greater abundance of pioneer species or lichens after fire and the greater abundance of residual species after clear-cutting. Spearman's correlation coefficients were calculated to relate variables characterizing physical disturbance of the forest floor and general site conditions to the two first differentiating axes. Variables characterizing forest floor disturbance severity were strongly associated with the first ordination axis in two of the study areas but not in the third one. The inte...
Forest management in the boreal forests of Canada has evolved with changes in resource availabili... more Forest management in the boreal forests of Canada has evolved with changes in resource availability, in forest harvesting and information technology, in markets for forest products, in social values, and in our basic understanding of the boreal ecosystem. The proverbial ...
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