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Assessment of cocoa input needs using soil types and soil spectral analysis

Singh Kanika, Vasava Hitesh B., Snoeck Didier, Das Bhabani, Yinil David, Field Damien, Sanderson Todd, Fidelis Chris, Majeed Israr, Panigrahi Niranjan. 2019. Assessment of cocoa input needs using soil types and soil spectral analysis. Soil Use and Management, 35 (3) : 492-502.

Article de revue ; Article de recherche ; Article de revue à facteur d'impact
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Quartile : Q3, Sujet : SOIL SCIENCE

Résumé : In this study, diffuse reflectance spectroscopy (DRS) approach was examined for making fertiliser recommendations in the smallholder cocoa farms of Papua New Guinea (PNG). Soil samples were collected from four provinces of PNG. Soil samples from four different depths (0–10, 10–30, 30–60 and 60–90 cm) of 32 profiles in each of these sited were used to create a database of soil chemical and physical properties. Spectral reflectance values at 1 nm interval covering visible to shortwave‐infrared (350‐2500 nm) were collected for each of these soil samples to develop partial‐least‐squares regression (PLSR) models. Soil textural fractions, soil organic carbon (SOC) contents and available N were well predicted by the DRS approach with R2 values larger than 0.75. Moderate to poor estimation efficiencies were observed for remaining parameters. Nevertheless, the estimated soil attributes and their corresponding measured soil parameters were used as inputs to a fertilizer recommendation model of Soil Diagnosis to create fertilizer recommendation for a targeted cocoa yield of 1000 kg dry cocoa beans/ha. Resulting fertilizer recommendations were similar for both of these input sources (measured and DRS‐estimated) suggesting that the DRS approach may provide an easy way to create fertilizer recommendations.

Mots-clés Agrovoc : Theobroma cacao, fertilisation, propriété physicochimique du sol, spectroscopie infrarouge, rendement des cultures

Mots-clés géographiques Agrovoc : Papouasie-Nouvelle-Guinée

Mots-clés libres : Cocoa nutrition, Cocoa soil, Diffuse reflectance spectroscopy, NIRS

Classification Agris : F04 - Fertilisation
P33 - Chimie et physique du sol

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

  • Singh Kanika, University of Sydney (AUS) - auteur correspondant
  • Vasava Hitesh B., IIT Kanpur (IND)
  • Snoeck Didier, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
  • Das Bhabani, IIT Kanpur (IND)
  • Yinil David, Cocoa Board of Papua New Guinea (PNG)
  • Field Damien, University of Sydney (AUS)
  • Sanderson Todd, CSIRO (AUS)
  • Fidelis Chris, Cocoa Board of Papua New Guinea (PNG)
  • Majeed Israr, IIT Kanpur (IND)
  • Panigrahi Niranjan, IIT Kanpur (IND)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592337/)

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