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Vegetable production in Vietnam is a high growth industry of agriculture sector. According to statistics, in 1999 the national vegetable growing area reached 430,360 hectares, yielding 142.6 kg/ha, and producing 6.13 million tons. By 2009 the index was above 735,335 ha (increased by 70%), 161.6 kg/ha (increased by 13%) and 11.88 million ton...

4 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 2076 | Lượt tải: 2

t is only the DNA or RNA fragment, it may be single or double strains with the coat protein. DNA or RNA may be free from coat protein and self replication using the genetic material from the host (virus infected tree). It can move from one cell to another through plasmodemata and become systemic infection through phloem tissues and the ...

35 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1992 | Lượt tải: 0

A major problemwith intensified pond-based aquaculture production systems has been managing water quality and discharge quotas dueto the accumulation of waste nutrients. This isexacerbated inthe currentCARD project which demonstrated the very high production capabilityofin-pond raceways inexcess of 35 ton/ha of combined mulloway and whiting...

43 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1774 | Lượt tải: 1

Establishment of an orchard is a long term investment and hence needs the complete planning. Any mistake committed during selection of site, plant density, choice of varieties, quality of seedling… reflects greatly on the orchard performance. For got management and sustained yields, it is very important to select a good site for orchard

42 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1882 | Lượt tải: 0

In the last decade, the fishery sector has achieved significant achievements through increasing its production, export value and ensuring food security for Vietnamese people. However, each sub-sector has achieved it own results. For example, aquaculture sub-sector has increased its production four fold from 600,000 tons in 1999 to 2,4 milli...

9 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1900 | Lượt tải: 0

The average population growth rate in Vietnam in the early 1990’s was 3.5%, but it is now slowing to 1.35%. This may be due several factors; a decreasedin fertility rates and better education provided to the ethnic minority groups who traditionally had large families and an increase in living standards. The Mekong Delta population growth rate...

156 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1789 | Lượt tải: 0

The Government of Vietnam (GoV) has embarked on a massive tree plantation program. By 2010 it plans to establish an additional 5 million hectares of plantations on cleared land, over and above the current plantation estate of one million hectares, plus the equivalent of more than 50,000 hectares of community forests in scattered plantings. Th...

7 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1816 | Lượt tải: 0

The Government of Vietnam (GoV) has embarked on a massive tree plantation program. By 2010 it plans to establish an additional 5 million hectares of plantations on cleared land, over and above the current plantation estate of one million hectares, plus the equivalent of more than 50,000 hectares of community forests in scattered plantings. Th...

7 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1848 | Lượt tải: 0

The terms ‘seed stand’ and ‘seed production area’ are generally referred to as “A plus stand that is generally upgraded and opened by removal of undesirable trees and then cultured for early and abundant seed production”. These two terms are often treated in different context. In somecountries, the term‘seed stand’ refers to a planted forest ...

14 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1688 | Lượt tải: 0

The Government of Vietnam (GoV) has embarkedon a massive tree plantation program. By 2010 it plans to establish an additional 5 million hectaresofplantationson bare hills and degraded forest lands, over and above the current plantation estate of one million ha, plus the equivalent of more than 50,000 hectares of community forests in scattered ...

44 trang | Chia sẻ: ttlbattu | Ngày: 21/12/2012 | Lượt xem: 1717 | Lượt tải: 0