Citation
Pushparajah E., . and Chew P.S., . (1998) Integrated nutrient management for sustaining high yields of plantation tree crop in Tropical Asia. [Proceedings Paper]
Abstract
Plantation tree crops are important in world trade and feature significantly in many tropical countries economies. They are grown mainly on Ultisols Oxisols and Inceptisols which frequently have several important soil constraints limiting the growth and yields of the crops. Adequate nutrient inputs are frequently required for successful crop cultivation in many of these soils dominated by low activity kaolinitic clays and organic matter but a package of agro-management practices including fertilization is advocated to give the best results. The nutrient requirements of these perennial tree crops may be initially estimated by computing the nutrient balance and matching the requirements against the supply available from the soil. A full nutrient management programme however should take into account the potential crop growth and yields refinements to the nutrient requirement computations using leaf and soil analysis diagnostic techniques and studying the inter-row management practices especially legume cover establishment and factors which could influence nutrient losses by run-off and leaching. The types for fertilizers used can be expected to affect soil properties including adverse effects such as soil acidification by nitrogenous fertilizers which should be avoided where possible. Fertilization will also affect quality of the plants including oil extraction ratios in oil palm and stability of crop yield as well as quality of the produce as seen in rubber. Changes in cropping practices fertilizers used and use of high-yielding cultivars need to be met by additional information especially on soil physical conditions and water-availability as well as new approaches to ensure optimal nutrient management. It is likely that the best results will come from an integrated site-specific nutrient management approach taking into account the site factors affecting growth and yields and agro-management practices affecting the efficiencies of the fertilizers applied.
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Abstract
Plantation tree crops are important in world trade and feature significantly in many tropical countries economies. They are grown mainly on Ultisols Oxisols and Inceptisols which frequently have several important soil constraints limiting the growth and yields of the crops. Adequate nutrient inputs are frequently required for successful crop cultivation in many of these soils dominated by low activity kaolinitic clays and organic matter but a package of agro-management practices including fertilization is advocated to give the best results. The nutrient requirements of these perennial tree crops may be initially estimated by computing the nutrient balance and matching the requirements against the supply available from the soil. A full nutrient management programme however should take into account the potential crop growth and yields refinements to the nutrient requirement computations using leaf and soil analysis diagnostic techniques and studying the inter-row management practices especially legume cover establishment and factors which could influence nutrient losses by run-off and leaching. The types for fertilizers used can be expected to affect soil properties including adverse effects such as soil acidification by nitrogenous fertilizers which should be avoided where possible. Fertilization will also affect quality of the plants including oil extraction ratios in oil palm and stability of crop yield as well as quality of the produce as seen in rubber. Changes in cropping practices fertilizers used and use of high-yielding cultivars need to be met by additional information especially on soil physical conditions and water-availability as well as new approaches to ensure optimal nutrient management. It is likely that the best results will come from an integrated site-specific nutrient management approach taking into account the site factors affecting growth and yields and agro-management practices affecting the efficiencies of the fertilizers applied.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| AGROVOC Term: | CROPS |
| AGROVOC Term: | SOIL |
| AGROVOC Term: | FERTILIZERS |
| AGROVOC Term: | NUTRIENTS |
| AGROVOC Term: | SOIL FERTILITY |
| AGROVOC Term: | YIELD INCREASES |
| AGROVOC Term: | ASIA |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/16232 |
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