Proceedings of the Fifth Asian Regional Maize Workshop - Search ...

plants per hill)
4. Intercropping experiments using maize with soybean led to the following recommendations:
Table 3.
Mean grain yields (kg/ha) of varieties at four locations.
Variety 1988 1989 1990 1991 1992 Average
Hl 31 4,275 4,093 4,441 5,424 3,907 4,438
HLS 4,382 4,289 4,675 5,480 4,169 4,599
HL 319 5,862 4,466 5,164
DL 11 4,461 4,336 4,131 4,309
TSB 1 5,328 4,732 4,830 6,274 4,427 5,118
HL 24 4,845 4,476 4,628 5,556 4,412 4,783
HL 26 4,402 4,054 4,327 5,426 4,265 4,495
HL 28 4,923 4,709 4,955 5,844 4,163 4,919
HL 36 4,790 4,633 4,720 5,486 4,317 4,789
HL 27 4,624 4,324 4,310 5,753 4,426 4,687
Mean 4,670 4,495 4,557 5,678 4,283 4,729
In early season (April-August) monocropped maize gave more benefit than maize intercropped
with mungbean.
- For the late season planting, 2 rows of maize + 2 rows of legume crops is most suitable.
Full season varieties like DK-888 are more suitable in intercropping systems than the early
ones.
Problems in maize research:
In South Vietnam, the Inst. of Agric. Sci. (lAS), is responsible for maize research. The
number of plant breeders is adequate,but the amount of staff with advanced degrees is limited.
The Maize Program has been developing, but there are several problems:
a. Lack of laboratories and equipment.
b. Experiment stations for maize research are passing through a difficult financial situation
and far from the Institute (60-300 km).
c. Among the many new high yielding varieties released by the lAS, only a few varieties have
been transferred to farmers fields. A similar situation exists with the new technologies.
IV. Extension
During recent years, many Extension Centers have been establis in various provinces. The
government is paying much attention to maize hybrid production. Agronomic technology has been
suggested and implemented through extension programs in several provinces where maize is produced.
The Government developed policies to stimulate maize cultivatiOn and has supplied to
farmers the required money to buy seed and fertilizer.
V. Cooperation
The Maize Program at lAS collaborates with the Maize Research Institute, CIMMYT, and FAO.
In addition to these, we cooperate with a number of other organizations inside and outside the
country, including seed companies in South Vietnam, seed companies in every province, Pacific
Seeds, Cargill, and CP-DK group in Thailand.
VI. Future development
By the year 2000, our target is to increase the maize producing area to 1 m ha, yield to 2.8
t/ha, and total production to 2.8 mt. To reach this objective, a number of problems in research,
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