Vol. 12 No. 2 (2014)

The new rice cultivar BT7KBL was bred by backcross method (Bac thom No7/IRBB21) followed by  pedigree selection. BT7KBL is highly resistant to race 3 and 5 of bacterial leaf blight and moderately resistant to  race 14. It has agronomic characteristics similar to Bac thom No 7 (BT7), short growth duration (130-135 days in spring season, 103 – 105 day in summer season), average yield 5.0 – 5.5 tons per hectare, and good quality. BT7KBL is suitable for  late spring and early summer season in the northern provinces of Vietnam. BT7KBL was accepted by MARD for expansion in Northern provinces.

 The growth and flowering characteristics of the new peach line GL2-2 (Prunus persia (L) Batsch) were evaluated in different ecological conditions in nortern delta and midland This new peach line GL2-2  appeared superior to the popular local variety DP2 in terms of flower quality characteristics: higher petal number, larger flower diameter,  higher ratio of open flower, and longer  flower life. Pilot cultivation in the different ecological conditions of Northern delta and midland of Vietnam also confirmed these characters and brought about higher economical efficiency in Thai Nguyen Province..  

The purposes of this study were (i) to compare the characters of photosynthesis and dry matter accumulation of the new promising short growth duration rice line DCG66 and check variety Khang Dan 18 (KD18) under two nitrogen levels: 0.5 g N/pot and 1.0 g N/pot in 2013 spring season in green house of Hanoi University of Agriculture and (ii) to evaluate the grain yield of DCG66 under four nitrogen levels: 80 kg N/ha,,100 kg N/ha, 120 kg N/ha and 140 kg N/ha and three transplanting densities: 25 hill/m2, 35 hill/m2 and 45 hill/m2 in both Spring and Autumn cropping seasons in Thai Nguyen and Lao Cai provinces. The results of pot experiment showed that there was no significant difference in the maximum of tillers per hill between two cultivars but leaf area was significantly higher in DCG66 than that in KD18 under both nitrogen treatments. CO2 exchange rate (CER) was similar between two cultivars at tillering stage but significantly higher in DCG66 in the dough-ripening stage under both nitrogen levels. There were closer positive correlations between CER and stomatal conductance at tillering stage and between CER and leaf nitrogen content at dough-ripening stage in DCG66 than those in KD18. At the tillering stage, total dry matter weight (DM) was significantly greater in DCG66 than that in KD18 due to higher DM of each part such as roots, culms and leaves under both nitrogen treatments. At dough ripening stage, total DM was not significantly different between two cultivars, but DM of leaves and panicles were higher in DCG66 than those in KD18. Individual grain yield was similar between two cultivars under the lower nitrogen condition but significantly higher in DCG66 than that in KD18 under high nitrogen condition due to higher number of panicles per hill. The results of field experiments showed that the grain yield of DCG66 was the highest in treatment with 120kg N/ha and 35 hills/m2 in Thai Nguyen (6.33 tons/ha in Spring season and 7.03 tons/ha in Autumn season) and in treatment with 100 kg N/ha and 45 hills/m2 in Lao Cai (6.24 tons/ha in Spring season and 6.49 tons/ha in Autumn season).

 The aim of this reaserch was to compare urea foliar application timing on growth and yield of groundnut (Arachis hypogaea L.) grown in net house and to determine the optimal timing of nitrogen application for improving yield and harvest index. The pot experiment was conducted in completely randomized design (CRD) with foliar  application of urea at 15, 22, 29 and 36 days after sowing and control without urea application. The results showed that the length of roots, number of branches and number of seeds per pod were not affected by foliar application timing. Urea application at 36 DAS increased number of filled pods per plant (16.2 pods/plant), pod weight per plant (22.0 g/plant), seed weight per plant (17.2 g/plant) and harvest index (0.59), although these were not statistically significant.

High Performance Liquid Chromatography-Mass Spectrometry Assay was employed for the determination of phenicol residues including chloramphenicol (CAP), thiamphenicol (TAP) and florfenicol (FF) in some animal products (pork, chicken meat, shrimp and fish). In this study, the liquid-liquid extraction and solid phase were optimized and then the method accuracy parameters were evaluated by analyzing the spiked samples at three different interest levels for each standard. The results showed that, the recoveries of TAP, FF and CAP ranged from 83 to 105% and 91.2 to 103.1% and 83.0 to 99.2%, respectively, with the relative standard deviation (RSD) of triplicates lower than 4.3%. The limits of quantification (LOQ) ranged from 0.01 ng/g to 0.3 ng/g not only for CAP but also for TAP and FF, allowing the analysis of trace levels of these antibiotics in animal products. The method can be applied to the phenicol residues analysis in several animal products available in the market.

Using total station to measure directly in the field and using specialized software such as MicroStation, FAMIS, Pronet in data processing and map editor is very popular in the measuring cadastral maps. The results of the information technology applications in establishing the cadastral map by the total station method in Phuoc Loc Commune, Tuy Phuoc District, Binh Dinh Province were  the survey network with 219 height points, of which 20 basis were Cadastral control points and the complete Cadastral map with a total area of 1166.99 ha. Cadastral map of Phuoc Loc Commune consisted of 16 pieces with 1:2000 scale map and 23 pieces with 1:1000 scale map saved as digital files on the computer and paper prints. Attached with the cadastral map was the statistical tables of the land areas by each object and land use. This is the important document which helps the State Agency to manage the land correctly, conveniently and consistently.

Landslides happen frequently in moutainous region, especially in the rain season in tropical zone like Vietnam. The landslide can impact severely on land use and other human activities in the high moutains. Therefore, to determine the damage of landslide is meaningful for local land users and officials to propose the best land use types in the specific area. Based on the economic methods, the damage of landslide was analysed specifically in Maichau District, Hoabinh Province, Vietnam. The damage is very large on agriculture, forest, residential land and road, of which the damage on road is the largest. Additionally, the results also indicate that the vital periods of land use types need to have solutions to avoid or mitigate the damage of landslide. The research finding gives significant warning to land users in other moutainous districts in Vietnam in the climate change era. However, to identify different aspects of landslide damage is not easy need to do research on other fields, such as: environment, human... in the present, future and long term.  

Most mini combines do not have cleaning system or if any in the very simple form. Cleaning system used for mini combine harvesters should be compact but still ensuring machine operation features. Inertial forces that arise during the system operation are very large, causing vibrations to the whole system and reducing the quality of the work. Thus, inertial forces need to be balanced. In this paper, we proposed a balancing solution for cleaning system and calculated the basic parameters of the proposed structural balancing to meet the requirements of the installation in the limited space of the mini combine.

For the time being, the tools to which the investors choose to make decisions in Vietnam stock market still have limits, especially the tools to predict future business results of enterprises. Exponential smoothing is one of appropriate methods to forcast a timeseries data based on the past observations. Therefore, the article focused on applying this method to forcast revenue and business performance of the listed steel companies. The main purpose was to support decision making of investors and business owners. The forecasted results indicated that the revenues in the first quarter of 2013 of Hoa Sen Joint Stock Company, Lien Huu A Joint Stock Company and Viet-Y Joint Stock company were VND 2,488 billion, VND1,820 billion,and VND 1,137 billion, respectively. The article also pointed out difference between the forecates and actual revenues of the selected companies and gives recommendations for managers and investors in decision making.

Located in the central mountainous area of northern Vietnam, Phu Tho province  is considered as the bridge between the North West area with Hanoi and the Northern plain provinces. Phu Tho’s tourist striking advantage is that Phu Tho is regarded as the land origin of Vietnam, with two world heritages, 1372 relics, 260 festivals, and more than 13,000 artifacts throughout the long period of construction and development of the country. These present the precious cultural heritage and are  the pride of the ancestral land in the flow of thousand years history of the nation. However, up to now, Phu Tho cultural heritage tourism is still not the destination for many visitors. This article reflected the current situation of roots tourism development in Phu Tho and proposed a number of solutions for roots tourism development in the province.

The research purpose was to assess  the implementation of environmental criteria and to propose solutions to accomplish such criteria in new rural construction in Thach That district. The study indicated that on average of the district, 23.06% of households used unhygienic water, mostly from open wells and 24.38% of households used unsanitary latrines, the figure of the later was 38.00% in the surveyed communes. The environmental contamination by solid wastes presents serious problem that badly needs solution by local governments. Several factors, such as policy mechanism, public awareness, peoples’ consciousness, existing economic conditions of the locality and households, production and business activities affect the local environment. The present  research proposed some solutions to overcome polluted situations, enhancing clean water supply and sanitary construction works in order to improve people’s life quality.

The general objective of the study is to reveal real consumer behavior towards clothing products of GARCO 10 at Long Bien district. The research results are mainly based on the primary data collected from the survey of 120 customers in 2013. The survey indicates that the largest number of consumers buys clothing products for themselves when their cloths are old. They usually shop at company’s stores, and products that they prefer the most are shirts and khaki pants. Buying frequency of the respondents is not so high with chiefly 1-2 times per year. The satisfactory levels of consumers are relative high towards sale staff, durability, design and price of the products. The EFA analysis shows that consumer behavior is affected largely by 6 factor groups, namely price, reputation and identity, sales staff, inference group, store facilities, product quality, and physical fitness. Among the variables included in the regression model, the product quality affects the most; and male customers have higher potential of buying GARCO 10’s clothing than female customers. Finally, the study proposes some suggestions related to developing high quality clothing products, diversifying range of products, and improving price policy in order to help the company attract more customers and then increase its sales.

In the recent years, the shortage of shirmp for processing is more popular in Ca Mau province and threatens the sustainability of the shrimp farming and processing sectors. The main reason is that the shrimp yield of Ca Mau does not keep pace with the quick development of processing capacity. The scattered and spontaneous development between the stages of production-processing chain is one of the most serious reasons leading to this situation. However, in fact, the linkage establishment is facing to many difficulties. There are a variety of factors  affecting to the establishment and development of the linkages. Legal framework, planning and role of local authority are three most important  factors. Using results of resesearch in Ca Mau’s shrimp sector, this paper was focused on analyzing the key impact factors to propose resolutions for strengthening linkage between the shrimp farmers and processors in the near future.

Rural areas are considered potential markets for domestic enterprises to expand their  business operations. This study focused on analysis of changing in structure of rural household consumption in the plains of Northern Vietnam and suggested opportunities for domestic enterprises to dominate the rural markets. The analysis results showed that the structure of rural household consumption shifted toward increasing proportions of the groups of commodities satisfying the needs of development and enjoyment. The groups of commodities such as processed foods, learning facilities, transports and goods for daily activities were identified as good opportunities for domestic enterprises to conquer the rural market. On the other hand, the significant increase in proportion of rural consumers who mainly consumer domestic products was also considered as a great opportunity for domestic enterprises to dominate the rural market.

Thestudyassessesthe impacts of international trade and protection on wage premiums across Thai manufacturing industries by recognising that workers are heterogeneous in their skills.The author derives atheoretical model from Ohnsorge and Trefler (2007) that isthe equilibrium model with heterogeneous skill bundles and estimates the model using micro data from Thailand. The results show that tariffs and NTBs are indicators of protection have negatively significant effect on wage premiums.Exports and imports are indicators of international trade measurement. Exports are positively significant impacts whereas imports have negatively insignificant impacts on the wage premiums. The results are significant and consistent with the theorem that previous studies predicted.

Randomized complete block design (RCBD) is used to analyse Topcross. Balanced incomplete block design (BIBD) and the partially balanced incomplete block design (PBIBD) are used to analyse partial Topcross. Keywords: Topcross, variety, Randomized complete design, tester, block, completely randomized design, balanced incomplete block design.

Augmented design is very useful in the early stage of the selection process. In this paper we descibe the design, method to analyse data and compare the results given by softwares Excel, Irristat, Cropstat, Minitab, Statistica, SPSS and JMP.