Soil erosion central vietnam

It had been a long time since I was back in the Central Southern Coast where I spent considerable time in during the Vietnam War. Thus when a friend asked me to fly to Cam Ranh Bay to see some potential investment projects in Ninh Thuan, I jumped at the chance.

Soil erosion central vietnam

General Statistical Office Cassava production has not been stable, as indicated by the decline in planted area from ha in to only ha in Figure 4.

Soil erosion central vietnam

This decline occurred throughout the country, but particularly in the southern part of South Viet Nam, where cassava had to compete with more valuable crops.

Cassava is grown mainly by small farmers, but there are several state-farms of over a thousand hectares in the country. The yield of cassava in Viet Nam has been increasing slightly, but is still very low. Yields gradually increased from 7.

Cassava land preparation methods vary among agro-ecological regions. On the sloping soils of the mountainous regions of both North and South Viet Nam, most cassava fields are plowed once, while in the Red River Delta and the North and South Central Coastal Regions they are plowed twice.

Especially in some cassava areas under intensive cultivation, such as in Son La, Hoa Binh and Quang Binh provinces, many farmers plow their cassava fields up to three times.

Cultivation of the land is an important process to make land arable by loosening and tilling (breaking up) of the soil.. Arable land area. Vietnam has a long history of affiliating with a dominant civilization and adapting that civilization’s ideas, institutions, and technology to Vietnamese purposes. This pattern of affiliating and adapting was already evident in Vietnam’s historical relations with China, and it reappeared as descendants of mandarins responded to the challenge of the West by rejecting tradition and becoming. VIETNAM. STATUS OF CASSAVA IN VIET NAM: IMPLICATIONS FOR FUTURE RESEARCH AND DEVELOPMENT. Hoang Kim ♦, Pham Van Bien and R.H. Howeler ♦ Director, Hung Loc Agricultural Research Center (HARC); Leader of National Program of Cassava Breeding and Dissemination; Secretary of National Root Crops Program. Director, Institute of Agricultural Science of South Viet Nam .

After plowing, most of the farmers harrow their land once in the south, once or twice in the north, but three to four times in Son La, Hoa Binh and Quang Binh provinces. However, more than half of all farmers in both North and South Viet Nam do not harrow their fields at all, but plant directly after plowing or manual land preparation.

Nearly all tillage for cassava is done by hand or with animals. According to cultural traditions of each region, farmers plant cassava on ridges or on the flat. However, in production and experimental plots the two different cassava planting methods did not show any significant difference in yield.

The ridge planting seems to be more suitable in heavy soils or on light grey and sandy soils which are poor in nutrients. On relatively good soils, flat planting may produce higher yields due to better land use.

Cassava area, production and yield in Viet Nam from to The planting time is variable, depending on local climatic conditions and cropping patterns Figure 5. Generally, farmers plant cassava either at the beginning first or second semester or at the end 4th semester of the rainy season.


In the provinces of the North Mountainous Region and Red River Delta, the planting is done from February to April, when soil moisture increases due to spring rains. However, the low temperature in February is a limiting factor, so in many areas cassava planted in March produces better growth and higher yields.

In the North Central Coastal Region, planting usually starts at the end of the year November—Decemberwhile in the South Central Coast and the Central Highlands cassava planting is generally done in the first semester; the harvest takes place from August to October before the height of the rainy season, which may cause flooding.

In the Southeastern Region, cassava is generally planted in the second semester, at the beginning of the rainy season April—Maybut in Tay Ninh province most cassava is planted at the end of the rainy season October. Stake preparation and storage: Almost in every region farmers use their own cassava stems for planting.

Only a few buy their stakes, mainly the medium- and large-scale farmers of Tay Ninh and Khanh Hoa provinces. Stake quality also influences cassava growth and yield. At the cassava harvest, long stems of 10 to month old plants, free of diseases and insects, are selected to cut stakes.

In the provinces of the North Mountainous Region and the Central Coastal Regions many farmers plant stakes taken from cassava stems harvested during the previous month.

But in parts of the North Mountainous Region, in the Red River Delta, in the Central Highlands and the Southeastern Region cassava stakes are normally stored 5—12 weeks before planting. If it is necessary to store stakes for a long time, most farmers place stems, tied in bundles, in a vertical position in a shaded area under trees, or cover the stems with leaves to keep them fresh and viable.

Under conditions of reduced sunlight and low temperature of the north, some farmers store stems horizontally in an open field and still maintain good quality.Get the latest science news and technology news, read tech reviews and more at ABC News.

The Xining Flood and Watershed Management Project (), supported by the World Bank, enhanced flood protection for , people, prevented nearly 5 million tons of urban wastewater from being directly discharged into rivers each year, and reduced soil erosion by more than 1 million tons.

Soil erosion central vietnam

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Vietnam: Vietnam, country occupying the eastern portion of mainland Southeast Asia. Vietnam (UK: / ˌ v j ɛ t ˈ n æ m, -ˈ n ɑː m /, US: / ˌ v iː ə t-/ (listen); Vietnamese: Việt Nam pronounced [vîət nāːm] (listen)), officially the Socialist Republic of Viet Nam (Vietnamese: Cộng hòa xã hội chủ nghĩa Việt Nam), is the easternmost country on the Indochina an estimated million inhabitants as of , it is the world's 15th-most.

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