In cropgrowdays: Crop Growing Degree Days and Agrometeorological Calculations

Quick Start

Install the latest stable version of cropgrowdays via CRAN with:

install.packages("cropgrowdays")

You can install the development version of cropgrowdays from GitLab with:

## if you don't have 'remotes' installed, automatically install it
if (!require("remotes")) {
  install.packages("remotes", repos = "http://cran.rstudio.com/")
  library("remotes")
}
install_gitlab("petebaker/cropgrowdays", build_vignettes = TRUE)

Overview

The cropgrowdays package provides functions to calculate agrometeorological quantities of interest for modelling crop data. Currently, functions are provided for calculating growing degree days, stress days, cumulative and daily means of weather data. Australian meteorological data can be obtained from Queensland Government's Department of Environment and Science (DES) website. In addition, functions are provided to convert days of the year to dates, and vice-versa.

We recommend using the cropgrowdays package in conjunction with the tidyverse and lubridate packages. Additionally, we also recommend using the furrr package to speed up adding agrometeorological variables to large data frames. For this document, we only use the lubridate package as follows.

suppressMessages(library(lubridate))
library(cropgrowdays)

Note that if you are not familiar with the lubridate package, then in order to see which functions are provided and which functions conflict with other packages, initially it may best not to suppress messages using suppressMessages.