Effects of NK fertiliser on soil pH and exchangeable K status on acid soils in an oil palm plantation in Malaysia

Kee, K. K.; Goh, K. J.; Chew, P. S.

doi:10.1007/978-94-011-0221-6_130

Cited by 11 publications

(10 citation statements)

References 3 publications

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“…This is consistent with the results of other studies [7,8] . The low soil pH can be ascribed to the proton release from nitrification of NH 4 + -N to NO 3 --N (29, 30, 31,) within the palm circle.…”

Section: Effects Of Long Term N Manuring On Soil Chemical Properties supporting

confidence: 94%

“…Apart from the above, significant soil variation can arise from land use and management practices [7,8] . High spatial variability of soil fertility was also found within microsites of palm circle, frond heap and interrow within single palm areas due to previous fertilizer application practices [8] , which might affect palm growth and the reported spatial variation of ffb yields.…”

Section: Introductionmentioning

confidence: 99%

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Spatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, Malaysia

Anuar¹,

Goh²,

Heoh³

et al. 2008

American J. of Applied Sciences

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Abstract:The identification and understanding of soil factors influencing yield variability of oil palm enable their efficient management. Soil samples were therefore collected from a fertilizer response trial on oil palm to study the spatial inorganic N distribution and some selected soil chemical properties as affected by long-term N fertilizer applications. The experiment was conducted on mature oil palms grown on Kumansi family (Typic Paleudults) soil in Tawau, Sabah, Malaysia. The soil samples were taken from 2 areas; with and without N treatments for 8 years. They were analyzed for total N, NH 4 + -N, NO 3 --N, exchangeable K, and pH. Semivariance analysis was used to characterize the spatial variance of soil NH 4 + -N and NO 3 --N while point kriging method was used to illustrate their spatial distributions. Results showed that application of N in the palm circle increased soil NH 4 + -N above 150 mg kg -1 at 0 to 15 cm depth. In unmanured plot, the NH 4 + -N contents were similar in the different sites within a palm area although the frond heap area tended to have higher NH 4 + -N probably due to the N return from the decaying cut fronds. The coefficient of variations for both soil NH 4 + -N and NO 3 --N exceeded 30% even within each microsite of palm circle, interrow, frond heaps, and harvesting path. Semivariance analysis showed that the maximum range of soil NH 4 + -N could be reached at 10 m and 90 m in areas with and without N respectively, indicating that the application of N fertilizer reduced its spatial variability in mature oil palm agroecosystem. The kriged soil map showed localized spots of high NH 4 + -N content, which corresponded to the palm circles where N fertilizer was applied. Gradual changes in soil fertility were observed in area without N, moving from northern to southern portion of the field. Long-term applications of N caused significant downward movement of NH 4 +

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Section: Effects Of Long Term N Manuring On Soil Chemical Properties supporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Spatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, Malaysia

Anuar¹,

Goh²,

Heoh³

et al. 2008

American J. of Applied Sciences

View full text Add to dashboard Cite

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“…9). The rate of decline in K + concentration was about 1.4 mg L −1 and virtually all the applied K disappeared at about the same time as NH 4 + ion since both nutrients are likely to move down the profile together [36] .…”

Section: Downward Movement Of N and Kmentioning

confidence: 96%

“…Besides this, nutrient uptake by palm roots will remove some of these ions resulting in lower nutrient concentrations in the soil solution with deeper soil depth. Furthermore, Kee et al [36] reported that roots reduced the movement of exchangeable K down the soil profile. This implied that soil solution K + as well as NH 4 + also reduced as ions moved downward.…”

Section: Downward Movement Of N and Kmentioning

confidence: 99%

Effect of N and K Fertilizers on Nutrient Leaching and Groundwater Quality under Mature Oil Palm in Sabah during the Monsoon Period

Tung¹,

Yusoff²,

Majid³

et al. 2009

American J. of Applied Sciences

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Problem statement:The oil palms are mainly grown in the humid tropics with high rainfall. Soluble Nitrogen (N) and Potassium (K) fertilizers are commonly required by the oil palm plantations to maximize palm productivity due to the highly weathered soils with low fertility. Thus, leaching losses of N and K nutrients may be unavoidable and these nutrients may move further downward and eventually cause groundwater pollution. This study reports the leaching of N and K nutrients in a mature oil palm field as affected by fertilizer rates and soil depths and its effect on groundwater quality during the monsoon period in Tawau soil depths of 60 and 120 cm, respectively. The transformation of NH 4 -N to NO 3 -N was not a major process during the monsoon period. The leaching losses of inorganic N were 1.0 and 1.6% of the applied fertilizer for N1P2K0 and N1P2K1 respectively. For K, the leaching losses were 5.3 and 2.4% for N0P2K1 and N1P2K1 respectively. The concentrations of NH 4 -N, NO 3 -N and K in groundwater ranged from 0.23-2.7, 0.07-0.25 and 0.63-9.54 mg L −1 , respectively. Conclusion/Recommendations: N and K concentrations in the soil solution decreased with soil depth and their leaching losses were related to rainfall pattern, fertilizer treatment and nutrient uptake by roots. Groundwater quality was not affected by the applications of N and K fertilizers at the optimum rates for mature oil palms.

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“…Nevertheless, it can be considered a detrimental environmental impact. The main drivers of soil acidification in oil palm are nitrate leaching and the off-take of nonacidic cations in harvested fruit (Kee et al, 1995;Nelson et al, 2010a;Dubos et al, 2016). Crop system models simulate these processes, so they are potentially useful for modelling soil acidification (Nelson et al, 2015b).…”

Section: Modelling Impacts On In-field Environmental Qualitymentioning

confidence: 99%

Modelling environmental impacts of agriculture, focusing on oil palm

Nelson¹,

Huth²,

Sheaves³

et al. 2018

Burleigh Dodds Series in Agricultural Science

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Introduction 2 Characteristics of models and the system 3 Integrated environmental impact modelling approaches 4 Modelling impacts of cultivation on components of the environment 5 Modelling causal processes 6 Conclusions and research directions 7 Where to look for further information 8 References Chapter taken from: Rival, A. (ed.), Achieving sustainable cultivation of oil palm Volume 2: Diseases, pests, quality and sustainability,

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Effects of NK fertiliser on soil pH and exchangeable K status on acid soils in an oil palm plantation in Malaysia

Cited by 11 publications

References 3 publications

Spatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, Malaysia

Spatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, Malaysia

Effect of N and K Fertilizers on Nutrient Leaching and Groundwater Quality under Mature Oil Palm in Sabah during the Monsoon Period

Modelling environmental impacts of agriculture, focusing on oil palm

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