Climate suitability zoning for palmyra trees in East Nusa Tenggara
1989
Akuba, R.H. | Nursuestini | Bobihoe, J. | Mahmud, Z. (Balai Penelitian Kelapa, Manado (Indonesia))
Palmyra (Borassus sundaicus) is more likely to be developed as main commodity in East Nusa Tenggara based on its climate adaptation, its usefulness to local people, the possibility of increasing production and varying its product. However, in order to get the maximal comparative advantages in its management, it has to be planted in the suitable climate areas. The research, which was conducted in January-February 1990, was to identify the suitable area based on climate in East Nusa Tenggara. The research activities consisted of surveys in plantation areas to determine climate suitability criteria and zoning the suitable area. The highly (L1.1) suitable areas have annual rainfall less than 2000 mm per year with dry month (month with rainfall less than 60 mm/month) for 4-8 months and occur in less than 100 m above sea level. These areas occupy 2 498 115 ha of land or 52.8 percent of the local areas. The suitable areas (L1.2) occur in 100-500 m above sea level, and have rainfall of less than 2000 mm per year with dry months for 4-8 months. They occupy land of 1 028 638 ha or 21.7 percent of the total areas. The marginally suitable areas occur in elevation of less than 500 m above sea level but the total annual rainfall is more than 2000 mm per year with dry month equal to or more than 1 month. They occupy 187 810 ha of land or 4.0 percent of the total areas. The unsuitable areas occur in elevation of higher than 500 m above sea level. They occupy 1 031 810 ha of land or 21.5 percent of the total area.
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