Modeling growth, development and yield of cassava: A review

Patricia Moreno-Cadena, Gerrit Hoogenboom, James H. Cock, Julian Ramirez-Villegas, Pieter Pypers, Christine Kreye, Meklit Tariku, Kodjovi Senam Ezui, Luis Augusto Becerra Lopez-Lavalle, Senthold Asseng

Research output: Contribution to journalReview articlepeer-review

16 Scopus citations

Abstract

Cassava is an important crop in the developing world. The goal of this study was to review published cassava models (18) for their capability to simulate storage root biomass and to categorize them into static and dynamic models. The majority (14) are dynamic and capture within season growth dynamics. Most (13) of the dynamic models consider environmental factors such as temperature, solar radiation, soil water and nutrient restrictions. More than half (10) have been calibrated for a distinct genotype. Only one of the four static models includes environmental variables. While the static regression models are useful to estimate final yield, their application is limited to the locations or varieties used for their development unless recalibrated for distinct conditions. Dynamic models simulate growth process and provide estimates of yield over time with, in most cases, no fixed maturity date. The dynamic models that simulate the detailed development of nodal units tend to be less accurate in determining final yield compared to the simpler dynamic and statistic models. However, they can be more safely applied to novel environmental conditions that can be explored in silico. Deficiencies in the current models are highlighted including suggestions on how they can be improved. None of the current dynamic cassava models adequately simulates the starch content of fresh cassava roots with almost all models based on dry biomass simulations. Further studies are necessary to develop a new module for existing cassava models to simulate cassava quality.

Original languageEnglish
Article number108140
JournalField Crops Research
Volume267
DOIs
StatePublished - 15 Jun 2021
Externally publishedYes

Keywords

  • Crop simulation models
  • Decision support systems
  • Dry matter content
  • Food security
  • Storage roots

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