Changes in solid phase properties of acid soils as affected by limestone gypsum palm oil mill effluent and rock phosphate applications

Shamshuddin J., . and Jamilah I., . and Sharifuddin H.A.H., . and Bell L.C., . Changes in solid phase properties of acid soils as affected by limestone gypsum palm oil mill effluent and rock phosphate applications. pp. 105-114. ISSN 0126-6128

Utisols and oxisols in Malaysia are dominated by kaolinite and sesquioxides which are characterized by high Al saturation low ECEC and Ca and/or Mg deficiencies. These acid soil infertility factors are limiting to annual crop production on the soils. A pot experiment was conducted to investigate the chemical changes in solid phase properties of some Malaysian utisols and oxisols affected by limestone gypsum palm oil mill effluent and rock phosphate applications. Results obtained showed that the negative charge on the clay surface of the untreated samples increased with an increase in soil pH. Limestone palm oil mill effluent and rock phosphate applications increased soil pH resulting in an increase in CEC (Cation exchange capacities) gram The CEC gram in the palm oil mill effluent treatment was further increased by an increase in the soil solution ionic strength and by the protonation of carboxyl and/or hydroxyl groups present in the organic matter. Exchangeable Ca and Mg increased while exchangeable Al decreased significantly after palm oil mill effluent and limestone applications. It was observed that exchangeable K was reduced by gypsum and rock phosphate applcations

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Abstract

Utisols and oxisols in Malaysia are dominated by kaolinite and sesquioxides which are characterized by high Al saturation low ECEC and Ca and/or Mg deficiencies. These acid soil infertility factors are limiting to annual crop production on the soils. A pot experiment was conducted to investigate the chemical changes in solid phase properties of some Malaysian utisols and oxisols affected by limestone gypsum palm oil mill effluent and rock phosphate applications. Results obtained showed that the negative charge on the clay surface of the untreated samples increased with an increase in soil pH. Limestone palm oil mill effluent and rock phosphate applications increased soil pH resulting in an increase in CEC (Cation exchange capacities) gram The CEC gram in the palm oil mill effluent treatment was further increased by an increase in the soil solution ionic strength and by the protonation of carboxyl and/or hydroxyl groups present in the organic matter. Exchangeable Ca and Mg increased while exchangeable Al decreased significantly after palm oil mill effluent and limestone applications. It was observed that exchangeable K was reduced by gypsum and rock phosphate applcations

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Item Type:	Article
Additional Information:	2 tables 8 fig. 27 ref.; Summaries (En Ms)
AGROVOC Term:	MALASIA
AGROVOC Term:	SUELO ACIDO
AGROVOC Term:	ANALISIS DEL SUELO
AGROVOC Term:	PRODUCCION VEGETAL/ CALIZA
AGROVOC Term:	YESO
AGROVOC Term:	PH
AGROVOC Term:	FERRALSOLES
AGROVOC Term:	FOSFATO MINERAL
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:56
URI:	http://webagris.upm.edu.my/id/eprint/20589

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