Fertiliser unit conversion

[rfrelat]

It would be great if the amounts of fertiliser could be converted in kg_per_year (used in the calculation of GHG emissions).
I found the fertiliser_units in rhomis package, but some values are missing (see below).

My script to calculate it (you might find a better way to do it):

#complete the fertilizer_units from RHoMIS package
newunits <- data.frame("survey_value"=c("2.5_kg","FALSE","litres","no_answer","sacks","sacks_20kg","sacks_46kg","tine_20kg","wheelbarrow"),
                       "conversion"=c(2.5,NA,1,NA,50,20,46,20,80))
fertiliser_units <- rbind(fertiliser_units,newunits)

convkg <- fertiliser_units$conversion[match(tab$fertiliser_units, fertiliser_units$survey_value)]
tab$fertiliser_kg_per_year <- tab$fertiliser_amount*convkg