Calculate field-pea emergence

Function calculates the time, in degree days, between sowing and emergence (when 50% of sown seeds have produces at least one true leaf).

Usage

calc_fpea_emergence(sowing_date, hemisphere = "south")

Source

https://doi.org/10.1007/978-1-4020-6065-6_9

Arguments

sowing_date

sowing date POSIXct.date

hemisphere

'North' or 'South' hemisphere

Value

number of degree days predicted from time of sowing to emergence

Details

Formula adapted from Schoeny. et al. (2007) in European Journal of Plant Pathology. Formula is reported to correlate to R^2 = 0.91 for pea cultivar Cheyenne grown in the west of France

Examples

calc_fpea_emergence("2021-05-10")
#> [1] 266.7598