Modeling the Relationship Between Nematode Densities and Plant Growth R package seinfitR version 1.0.1 Implements the Seinhorst model to analyze the relationship between initial nematode densities and plant growth response using nonlinear least squares estimation. The package provides tools for model fitting, prediction, and visualization, facilitating the study of plant-nematode interactions. Model parameters can be estimated or set to predefined values based on Seinhorst (1986) <doi:10.1007/978-1-4613-2251-1_11>. Software Depends: R (>= 3.5) Imports: minpack.lm Suggests: testthat (>= 3.0.0), readxl, knitr, rmarkdown João Novoletti <joao.novoletti@gmail.com> Comprehensive R Archive Network (CRAN) Deoclecio Amorim [aut] (cph), João Novoletti [aut, cre, cph] GPL (>= 3) 2025-04-09 application/tgz https://CRAN.R-project.org/package=seinfitR doi:10.32614/CRAN.package.seinfitR