@article{fdi:010072623,
  title = {{E}ffects of recycled bentonite addition on soil properties, plant growth and nutrient uptake in a tropical sandy soil},
  author = {{C}roker, {J}. and {P}oss, {R}oland and {H}artmann, {C}hristian and {B}huthorndharaj, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he only way to increase the low {CEC} of sandy tropical soils over the long term is to apply high {CEC} materials such as 2:1 clay minerals. {A}cid activated bentonite is used in {T}hailand in the vegetable oil industry during the clarification process. {T}he waste bentonite is discarded afterwards. {T}he aim of the study was to compare the effects of the addition of these oil bentonites ({OB}) with the addition of cation beneficiated bentonite ({BB}) on soil properties and plant growth. {P}alm, rice and soybean {OB}, and bentonite beneficiated with calcium, magnesium, and potassium were applied at rates between 5 and 40 t ha(-1) to an {A}renic {A}crisol. {T}hree consecutive crops of sorghum were grown in pots. {B}iomass and plant nutrient content were determined at each growth phase. and selective soil properties were measured at the start and the end of the study. {B}eneficiated bentonite was not water repellent, but the addition of {OB} resulted in soil water repellency. {T}he application of bentonite at the rate of 40 t ha(-1) increased the cation exchange capacity ({CEC}) from 0.6 cmol(c) kg(-1) in the control to 1.9 and 0.7 cmol(c) kg(-1) in the {BB} and {OB}, respectiveley. {T}he lower value of the {CEC} for {OB} compared to {BB} was probably due to the activation process and oil coating. {OB} applications at rates higher than 20 t ha-1 did not increase biomass. and biomass decreased with increasing water repellency. {T}he other treatments produced a higher biomass than the control. {H}owever biomass was below potential because of widespread nitrogen deficiency. {E}xchangeable {K} was exhausted in two crops, whatever the initial level, stressing the issue of {K} management in this soil type. {S}oybean {OB} is a promising material for soil chemical properties and biomass production, probably because of its low oil content.},
  keywords = {acrisol ; bentonite ; {CEC} ; plant nutrition ; rehabilitation ; {T}hailand ; {THAILANDE}},
  booktitle = {},
  journal = {{P}lant and {S}oil},
  volume = {267},
  numero = {1-2},
  pages = {155--163},
  ISSN = {0032-079{X}},
  year = {2004},
  DOI = {10.1007/s11104-005-4641-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072623},
}