check_vars: Performs sanity checks on soil variables
In mbask/fertplan: Compute Components Of NPK Fertilization Plans

Description Usage Arguments Details Value Examples

View source: R/checks.R

The computation of nutrient fertilization plans requires a few atmospheric, crop, and soil variables to be shared among all soil analyses. Each nutrient fertilization plan requires specific variables, the functions checks whether these features have been filled in the appropriate variable list, for each specific nutrient.

1	check_vars(vars = NULL, nutrient)

`vars`	A list where atmospheric, crop, and soil variables needed are given, or `NULL`
`nutrient`	One of "nitrogen", "phosphorus", "potassium"

The data object are passed to appropriate fertplan functions by demand_nutrient(), further information on variables, and their unit of measure can be found in help pages and vignettes of the fertplan package. Variable list templates for variables:

Template for nitrogen nutrient list:

crop, The crop name to be sown, character
part, The part of interest of the crop (Frutti, Pianta, ...), character
crop_type, The crop type to be sown, character
expected_yield_kg_ha, Expected crop yield, integer
prev_crop, Soil clay content, character
texture, Soil texture (one of "Sandy", "Loam", "Clayey"), character
drainage_rate, Rate of drainage in soil (either "fast", "normal", "slow", "no drainage"), character
oct_jan_pr_mm, cumulative precipitation in mm in the 4 months-period October - January, integer
n_supply_prev_frt_kg_ha, Supply from organic fertilizations, integer
organic_fertilizer, Type of organic fertilizer used, character
years_ago * Time since last organic fertilization, integer
n_supply_atm_coeff, A ratio to correct the N from atmosphere, numeric

Template for phosphorus nutrient list:

crop, The crop name to be sown, character
part, The part of interest of the crop (Frutti, Pianta, ...), character
crop_class, The class of crop to be sown, character
expected_yield_kg_ha, Expected crop yield, integer
texture, Soil texture (one of "Sandy", "Loam", "Clayey"), character
soil_depth_cm, depth of soil tillage practise, integer

Template for potassium nutrient list:

crop, The crop name to be sown, character
part, The part of interest of the crop (Frutti, Pianta, ...), character
crop_class, The class of crop to be sown, character
expected_yield_kg_ha, Expected crop yield, integer
texture, Soil texture (one of "Sandy", "Loam", "Clayey"), character
soil_depth_cm, depth of soil tillage practise, integer

Note that the appropriate classes of the variables needed for each specific nutrient may be looked up by passing NULL as vars argument, like in check_vars(NULL, "potassium").

A data.table subset of the vars list featuring only the specific variables for the nutrient given or, if vars is NULL a character vector of classes of the relevant variables for each specific nutrient.