Update comment

src/crop/almass.jl

@@ -366,8 +366,9 @@ Parse a CSV file containing the required parameter values for each crop
 """
 function readcropparameters(cropdirectory::String)
     @debug "Reading crop parameters"
-    # TODO: using String as type for last column in cropdata (this is
-    # the sowingdensity column) until the 35/80 entry is resolved
+    # TODO: the last column (sowingdensity) uses `String` as type.
+    # This is because the entry for "peas/beans" has a value of
+    # "35/80" for the sowingdensity.
     cropdata = CSV.File(joinpath(cropdirectory, CROPFILE), missingstring="NA",
                         types=[String,AnnualDate,AnnualDate,AnnualDate,AnnualDate,Float64,String,Float64,Bool,String])
     growthdata = CSV.File(joinpath(cropdirectory, GROWTHFILE), missingstring="NA",