Comparison of different phosphorous adsorption models in acid forest soils of Bityili (Southern – Cameroon) and their relationship with soil properties

Abstract

This study was designed to compare the phosphorous fixation capacity of three soils series named Tyele, Minkonmingon and Mekoto in the south region of Cameroon and to determine the soil properties that are the main predictors of the P activity of those soils. Five adsorption equations viz. Linear, Langmuir, Van Huay, Freundlich and Temkin were used to describe P adsorption processes. The results of the study showed that maximum adsorbed P of Minkonmingon, Tyele and Mekoto was 936.09, 311.15 and 823.37 mg kg-1 of soils respectively with the mean of 690.20 mg kg-1 of soils. By applying various models, P adsorption data revealed that for low concentration range, the Freundlich equation show a better fit followed by the Langmuir, Van Huay, Temkin and Linear equations. It can be thus concluded from the adsorption and Spearman correlation analysis that the soil of Minkonmingon has a greater capacity to fix P followed by those of Mekoto and Tyele respectively with silt, exchangeable acidity, free aluminum, potassium and soil organic carbon and pH KCl being the main predictors of P activity in these soils.

Contributions of soil chemical and physical properties in the dynamics of soil quality in the southern Cameroon plateau shifting agricultural landscape

“…In the field, direct observations of the physiognomy of land cover coupled with the identification of dominant plant species and interviews of local farmers helped to determine the cover types and their age ranges. Dominant soils across the area are acrisols and Ferralsols (WRB, 2006); they are acidic in the level of series (Adibime et al, 2016). They were located in the upper gently sloping valleys.…”

Adsorción y dosificación de Ca en suelos de Buenos Aires, Argentina

“…En resumen, estos resultados sugieren la posibilidad de desarrollar un estudio acerca del comportamiento del Ca en la Región Pampeana similar al realizado en suelos oxisoles [24], como así también en otras bases del suelo [2], [3], [7], [29]. Este estudio preliminar, sin embargo, no permitió evaluar el impacto de los principales parámetros de suelo en extenso como se ha realizado en otros nutrientes [6].…”

“…Las isotermas de adsorción se definen como una relación que describe el fenómeno que rige la movilidad de una sustancia de un medio acuoso poroso, incluyendo retención y liberación, hacia una fase sólida a temperatura y pH constante [1]. La adsorción en suelo afecta la disponibilidad de nutrientes y, en consecuencia, se han utilizado como herramientas para evaluar la dinámica de micronutrientes y macronutrientes, como potasio (K) y fósforo (P), en sitios considerados deficientes [2], [3].…”