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UID:20250909T171444EDT-5849rJFI2u@132.216.98.100
DTSTAMP:20250909T211444Z
DESCRIPTION:PhD Oral Defence of Eko Leksono\, Bioresource Engineering\n\nIn
  Indonesia\, sugarcane and oil palm are cultivated commonly in organic or 
 sandy clay loam soils. The usual way to determine fertilizer demand relies
  on cumulative randomized grid sampling. As a result\, the fertilizer pres
 cription becomes relatively uniform across the whole farm. In fact\, spati
 al variability of various soil properties is often diverse across the fiel
 d\; therefore\, it is necessary to develop the PA methodology to provide a
  better understanding of soil chemical attributes in the field. First\, a 
 soil apparent electrical conductivity (ECa) inversion algorithm was needed
  to depict the general characteristics of top organic soil. Subsequently\,
  from soil ECa inversion input\, sampling schemes were built to further ex
 amine the soil chemical properties. Thus\, reliable manual and automatic s
 oil sensing platforms were needed. Both platforms\, developed in this rese
 arch\, rely on the Direct Soil Measurement (DSM) principle and they facili
 tate multiple soil chemical analyses (pH\, nitrate) using multiple Ion-Sel
 ective Electrodes (ISEs). The manual system was based on a modified generi
 c soil sampler to accommodate portability\, whereas the automatic system\,
  called On-the-spot Soil Analyzer (OSA)\, was designed to operate as a veh
 icle attachment. Both systems were successfully tested in the field for th
 eir operation and for determining soil pH (R2 of 0.53 to 0.88) and Nitrate
  (R2 of 0.72 to 0.84).\n\nEveryone in the ºÚÁÏÉç community is welcome to a
 ttend a PhD Oral Defence. Please join us in celebrating the accomplishment
 s of our PhD candidates.\n
DTSTART:20200302T141500Z
DTEND:20200302T141500Z
LOCATION:MS2-084\, Macdonald-Stewart Building\, CA\, QC\, St Anne de Bellev
 ue\, H9X 3V9\, 21111 Lakeshore Road
SUMMARY:PhD Oral Defence: Development of equipment to characterize soil att
 ributes in different agricultural settings
URL:/macdonald/channels/event/phd-oral-defence-develop
 ment-equipment-characterize-soil-attributes-different-agricultural-setting
 s-320793
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