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A clean and hi-tech agricultural production zone

Agricultural production that is oriented to be clean and using advanced technology is one of targets of the sector all over the world and in Vietnam. This article mentions agricultural content in the near future. In addition, factors influencing a clean and hi-tech agricultural production are also referred therein.

A trange insect damaging Eucalypts has occured in our country

Eucalypts have been planted over large areas in Vietnam for pulp wood production. Recently in Ho Chi Minh City and Southeast region of South Vietnam a strange insect species was found in the new plantations and nurseries of Eucalypts. Seedlings and young plants may be attacked by this insect species that causes the knobs for leaf ribs and young branches,of Eucalypts seriously damaged. The results of an enquiry recently effectuated at Binh Phuoc state owned Forestry Enterprise in the plantations with Eu. Camaldulensis showed that the density of this parasite insect was quite high. It has been identified by the Forest Protection Laboratory of FSIV as Leptocybe invasa Fischer & La Salle belonging to Eulophidae famlily Hymenoptera order.

Analysis of the effects of bank credit for the shrimp farming households at Phu Vang district, Thua Thien-Hue province

The paper is dealing with an economic analysis conducted to figure out the effects of bank credit for shrming farming households at Phu Vang district, Thua Thien-Hue province with regards to shrimp hatching. The input factors including expenditure for food energy, disease control and salary etc... were analyzed as independent variables in the multiple logistic fariming households and were correlated to some of those input factors, on which the bank loans have impacts.

Biochemical composition of some new tea varieties cultivated at Phu Ho, Phu Tho province

This research was conducted on eight Shan tea varieties and nine exotic varieties. According to research findings, Shan varieties which came from mountainous areas and were transplanted in low land areas, not only were of high quality but also had high nutritional contents such as tannin, glucose, protein and dissolvent. China and Taiwan's exotic varieties have a lower content of tannin but a higher content of glucose, amino-acid and aroma than that of the central areas of Vietnam.

Constructing the analytic math model for the structure of seirpus compressor

Constructing the analystic math model of seirpus compressing process permits to investigate the effect of main parameters as composition and kinetics of axis towards material layer. By digital method of the model, we can define pressure and obstructing momentum that allows to choise the structure of the most proper working part.

Economic aspect of the 3 farming systems (Tripple rice; Double rice + 1 upland crop; Tripple rice + fish) in the 2 ecological areas of Vung Liem district, Vinh Long province

Rice production is the major income in Vung Liem district Vinh Long province where the rice production pattern includes 3 farming systems (tripple rice; double rice + once upland crop; tripple rice + once fish). To investigate the economic aspect of the 3 above farming systems, an experiment was carried out on the 2 ecological areas of Vung Liem district in 3 cropping seasons Dong Xuan, He Thu and Thu Dong. The results showed that the farming system tripple rice + fish gave the highest profit and required more labor compared with tripple rice. The farming system double rice + once upland crop gave also high profit So, in the first ecological area the farming system double rice + once upland crop can be applied; in the second ecological area the farming systems tripple rice + once fish can be applied.

Economic efficiency of cultivated land use for household economy models in Tu Liem district, Hanoi

Tu Liem is an out-of-town district of Hanoi. In recent years, its agricultural economy has been changed significantly toward commercial production. Many households' economy models have efficiently used cultivated land. These models are presented specifically therein.

Effect of the organic biofertilizer "Fitohoocmon" on rubber trees cultivated by the Rubber Company Chu Se at period II (2000-2003)

Since the year 2000, the Fitohoocmon has been manufactured by adding to organic fertilizers in N-P-K proportions according to the "Nutritional diagnostic method”. By using the Fitohoocmon with the N-P-K proportion of 3:1:8, the latex productivity of rubber trees in an area of 3.000 ha increased by 22% in comparison with the norm of the Viet Nam Rubber Corporation and by 5% in comparison with that of of the formule 5:2:6. By using the Fitohoocmon "3-3-8" the growth of the pre-exploitation rubber trees was equivalent to the norm of the corporation or greater. In addition, after 3 years of use, the Fitohoocmon with N-P-K proportions increased the humus as well as the assimilable N, P content of the soil in comparison with those of the stage 1995-2000.

Effects of activities for participatory technology development at Hoa Binh

Participatory technology development (PTD) is a new approach to transferring of knowledge to farmers that has been applied at Hoa Binh since 1999 by Center for Social Forestry Training (Xuan Mai Forestry University) in co-operation with Hoa Binh Agriculture and Forestry Extension Center and Institute of Agricultural Olemistry and Soil. This paper pointed out some strong points and weaknesses of this approach as compared with the ordinary extension demonstration method.

Fixed cultivation and settlement in the innovation period (1990-2002)

Fixed cultivation and settlement for ethic minorities plays a vital role in the national economy- politics and security. From 1992 to 2002, the State and the Party invested in 771 projects with a total capital of VND 1,189 billion. The initial aims of the fixed cultivation and settlement for ethic minorities are to help them in focus on commercial agricultural production restrain forest destroying and reduce poverty. In this article, the obstacles and solutions were investigated to improve the fixed cultivation and settlement for ethic minorities in the coming years.

Growth of erythrophloeum fordid provenances and families in conservation stand established in Cau Hai, Phu Tho

Two hundred seeds of ten provenances, each contained 10 mother trees, of Erythrophloeum fordid Olivo have been collected for establishment of conservation stand in Cau Hai, Phu Tho province. After 5 years the growth potential of the provenances and families was promising with mean annual increment of about 1 cm per year for diameter and 0.8 cm per year for height. The difference in growth between families was significant (F pr < 0.001). Five families ranked first in both diameter and height are BT6, QN5, HB3, TH7 and TD11.

Hereditary attributes of the lean portion of three pig stocks, namely Duroc, Landrace, Yorkshire and some their hybrids in the North Vietnam

Out of three hereditary attributes, the value of directly aggregated heredity (Ad) of Landrace, Yorkshire and Duroc accounts for 42%, 38% and 28% respectively. The aggregated heredity value of sire (Ad) of Duroc/ Landrace and Yorkshine represents by 4%, 3% and -1% respectively. The aggregated heredity value of maternal zoid (Am) of Duroc reaches the highest rate (6%) and that of the other pig stocks is between -4% and -2%.

Identification of the nutritional needs of HF cross-bred calves from six months old mating age, under the protein-origimated energy system and digestion via the the small intestine

During the weaning stage (6-12 months old), the diet of HF cross-bred calves reaches 115% against the energy needs (UFL) and protein (pDI) compared to France's standards, which help calves further absorb nutrients, grow quickly and narrow the duration of estruation and first mating (17.2 months). At 13 months, calves need a diet of 152% when being mated (ensuring 100% needs).

Identification of the winter-spring crop of F1 hybrid rice of 838 secondary optimal complex in Quang Nam province

In Quang Nam province the climate is suitable for produce the seed of hybrid-rice "3 line". For the combination of Nhi Uu 838 the rice plant should be eared from 10/3 to 14/4. Sowing the mother and father line in the same day, these rice plants were eared simultaneously. In order to sufficient pollen for mother line, the father line should be sowed in two times: the first time is sowing the same day with the mother line and the second is 3 day after the mother line.

Impacts on the embryonic ratio of CV2000 ducks

The ratio of embryonated eggs of a flock of CV2000 ducks is low (83%). Regardless of whether they are male or female, their capacity to create embryo is different. Different drakes have various concentration and quantity of spermatozoa (on average, 0.726-0.078 million/ml and 0.419+/-0.033ml/ejaculation).

Integrated impacts of growth and trade of Vietnam rice sector during the integration process

This article presents a summary of the integrated impacts of growth and trade liberalization in the rice sector of Vietnam. Trade liberalization has many positive impacts on the economy- food security and on poverty alleviation, but mainly negative impacts on environment. In fact., rice expansion and intensification have negative environmental impacts such as soil degradation, water pollution and loss of agro biodiversity, loss of aquatic habitant, fresh water and human physical health, forest an wetlands limitation and the replacement of traditional rice varieties with modern ones. These impacts make increasing costs for water purification, soil rehabilitation, health care ... Solutions to reduse these environmental impacts was also be investigated herein.

Introduction of the KOD.WQPS program for culculation of flood event and and is alluvial sedimentation

Based on the improved formula of calculating flood events (lD*) and its alluvial sedimentation developed by Do Tien Lanh, Nguyen An Nien and the improved diagram of substance transmission designed by Bui Viet Hung and Nguyen An Nien, the formula combined by KOD-WQPS software program used for calculating hydraulic power is developed with the aim to resolve the lD* problem related to alluvial sedimentation and components of water sources (salt content, pollution etc). The program is called KOD.WQPS, version 1.0. It shall be trailed on an assumed diagram and put into practice in Long Xu yen Quadrangle.

Major irrigation solutions for 2004/05 winter-spring crops in the Southern provinces

The winter-spring crops play a vital role in agricultural production in terms of area, yield and output. Therefore, it is necessary to prepare favorable conditions for these crops, in particular, irrigation solutions for the 2004/05 winter-spring crops. This article presents the characteristics of weather and water resources up to October 2004 as well as a detailed irrigation plan in certain areas such as the Mekong Delta, Southeast region, Ninh Thuan, Binh Thuan, Central Coastal Area and the Central Highlands. Some recommendations to the departments of agriculture and rural development are also presented therein.

Meat performances of F1 hybrid goat (between Bach Thao and local goat) rearing in Dak Lak province

The results of the research showed that: - Slaughtered body weight of P1 hybrid goats between Bach Thao (DT) and local goat (Co) at the age of 6,8 and 10 months in Dak Lak province was 18.85kg, 24.18kg and 27.50kg respectively. Slaughtered body weight of males is higher than females from 1.56kg to 3.93kg per head. – At the age herein before, carcass and dressing carcass meat ratio are 42.12%, 45.62%, 46.89% and 30.64%, 32.57%, 33.58% respectively. The quality of goat meat is good with 22.78%-5.44% dry matter and 21.01%-23.22% protein. It is good to slaughter goat at 8 months old to have high quality carcass and medium lipid ratio.

Optimal use and management of farmer households labour force in Dinh Hoa commune, Thai Nguyen province

The principles of farm management are not different from those of complex business activities. Production planning depends very much on the farmers resources and attitudes. With the holistic approach, a farmer has multiple objectives in his farming. Therefore, Multiple Goal Linear Program (MGLP) is strong analytical tool for efficient farm management. From predicted scenarios, it allows farme rs to have more alternatives to choose optimum solutions, fitting to their objectives, resources, and their internal conditions as well as external factors.

Pierce-ground-radar and multi-polar electricity usage in dike and dam defects identification

It has quite difference in soil covering material for gravity dike homogenous dike and concrete dike which are usually excavated at right the spot. Through the progress of usage improvement batterment it shows that there are many hidden dangers which may cause to break down the dikes and dams, it can not be discovered soon to be treated at once. In the article author describes the testing results and proposes two geophysic measures. They are ground penetrating radar and multipolar electricity.

Preliminary results of forest restoration models in the semi-flooding areas of Hoa Binh lake

Some models of forest restoration were established in semi-flooding land. They are: Homogeneous plantation with melaleuca leucadendra, Long Xuyen province; Heterogeneous plantation: melaleuca leucadendra mixed with other species, forest restoration is combined oriented protection. Tthe paper also presented out the strong points and weaknesses of these models.

Preliminary study on fruits species diversity in Thua Thien-Hue province

The diversificalion of climatic and edaphic conditions in Thua Thien-Hue province has contributed to the wealth of fruits diversity. We have collected and identified 92 species, 1 variety, 1 form of fruits belonging to 35 families, which include 56 genera. The family that contains the largest number of species is the Rutaceae. In species diversity, there are 77, 67, 61, 53, 51 species distributed in inland area, hilly area, coastal area, Nam Dong Valley, A Luoi mountainous area (above 500 m at elevation), respectively. In species constancy, 1, 7, 84 species were at high (c>50%), medium (c=25-50%), low (c<25%) level respeclively. Four species Thanh Tra pummelo (Citrus grandis), Huong Can mandarin (Citrus reliculata), dau Tien rambai (Baccaurea ramiflora), and Hue fig (Ficus auranculata) are the specialties of Thua Thien-Hue. There are the endemic species of Indo-Chinese region, Diospyros decandra; of Vietnam Artocarpus tonkinensis and Baccaurea silvestris. The rarely distributed species are Garcinia shefferi, Citrus depressa, Musa balbisiana, Musa chiliocarpa. We should pay attention to in-situ conservation of these species.

Present status of overtopping structures and challenging problems

Safety of the reservoir headworks are very important, nowadays many measures can be used to make their safety including construction of the overtopping structures. In Vietnam, during recent years many overtopping structures of the reservoirs have been constructed, but there is still lack of studies in this problem. Basing on the practical investigations of the typical reservoirs, this study mentioned the present status assessment of the overtopping structures in Vietnam and pointed out the challenging problems that should be studied in detail.

Production figures on five generations of CV2000 ducks at Vigola duck farm

This study was conducted on 17 families of five generations from 1999 to 2003 and showed that ducks laid their eggs at the age of 145-8-156,5 days, the average eggs production of each female per year ranged from 224,6 to 232,9 eggs. Egg production per female in the first period ranged from 224,6-232,9 eggs. The average production failure age was around 26,33 days and gradually increased. The time for production pause was 1,84 days with 2. 61kg of food for each 10 eggs.

Progress of multiplication of CN01 standard chrysanthenum variety in vitro

CNO1 standard chrysanthemum is a valuable variety of flower. But now its production is facing up to main difficulty that is the lack of seedling with adequate quality. Our purpose is producing seedlings which are free of disease and identical heredity. So we have developed multiplication procedure of standard chrysanthemum variety by in vitro techniques. There are our sevsral results: The best method for decontaminate is using HgCl2 with of concentration of 0,1 % in 5 min. The best medium for shoot multiplication is MS + 0,5 mg/l BAP + 15% CW. The best medium for rooting is MS + 15% CW. The seedlings are planted in the best place which consist of soil and semi-rice husk ash or sandy soil and semi rice husk ash.

Research on diseases of peanut and methodologies to prevent these diseases in Quang Binh

This paper presents a research on diseases of peanut and some research results of preventive methods in Quang Binh. It is a poor province in Central region. There are a lot of difficult conditions in agriculture production, the diseases of peanut occurred very often. This objective of paper is to describe diseases of peanut and some research results of preventive methods. The research has evaluated diseases of some peanut varieties such as DT2 , MD7, L14 and DL10. The research has applied IPM methods of peanut. The research has defined peanut varieties MD7, DT2 that get yield higher than that of local peanut variety. In addition, IPM methods for peanut are effective.

Return flow in the hydraulic system

At present the water resources can meet water demand, but it has been forewarned that the water balance may be broken down in the few next decades in Vietnam, especially in the upland areas. Therefore, water return mentioning as a component in the water balance equation has great significance in managing and developing effectively the water resources.

Seedling multiplication of casheww tree by grafting

Application of ordinary grafting technique to seedling multiplication of Cashew tree was not succeeded. This study is aiming to work out the treatment skill to increase survival rate of grafted seedlings. For this purpose three issues should be taken into consideration: Impacts of treatment method, effect of grafting techniques and influence of the age of stocks on the survival rate of grafted seedlings. It was revealed that grafting techniques had strong impacts on the success of seedling multiplication of Cashew.

Shift from specializing in rice cultivation to bare land aquaculture in Gia Binh district (Bac Ninh province)

Gia Binh, Bac Ninh is a district where farmers specialize in rice cultivation. In spite of years of intensive farming, the productivity is still low. The main reasons for this are the large cultivation surface, one crop paddy and unstable yield and productivity. In order to shift the crop and animal structure, Gia Binh has transferred to aquaculture. Newly adopted combining models between rice cultivation and greenclawed crayfish raising, and fish rising... have helped farmers to increase their income.