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Sources
A wide range of fertilizer products is available
on the market. The choice of fertilizer depends
on the following factors:
-
Nutrients required.
-
Availability of fertilizers.
-
Physical and chemical properties (nutrient
concentration, availability) of fertilizers.
-
Cost ($ kg-1 N, P, K, Mg, B, and Cu).
-
Soil characteristics (pH, clay content and
type, texture).
-
Terrain (e.g. flat, sloping, hilly).
-
Palm age and condition.
-
Climate.
-
Availability of labor.
In general, the water soluble fertilizers are
used for immature palms, correction of nutrient
deficiencies, and aerial application. Water
insoluble fertilizers (e.g. dolomite, rock
phosphate) are used on acid soils to provide a
sustained slow release of nutrients, to counter
the acidifying effect of urea and SOA, and to
build up soil fertility. The common fertilizers
used in oil palm are listed by Goh and Härdter
(2003) and a comprehensive account is
given by Chew et al. (1994). Also, the common sources of fertilizers for each nutrient are described under Deficiency section.
Reference
Goh K.J., Rolf Härdter and Thomas F. (2003) Fertilizing for maximum return. In: Thomas Fairhurst and Rolf Hardter (eds). Oil palm: Management for large and sustainable yields. Potash & Phosphate Institute and International Potash Institute: 279-306
Note: The full list of references quoted in this article is available from the above paper.
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