toolProjectFertilizerTg

Projects fertilizer tonnages onto the harmonized land: for every year after the harmonization year, the change of each region's tonnage total relative to the harmonization year is distributed onto the clusters of the region proportional to their harmonized crop group area of that year, on top of the per-cluster target tonnage of the harmonization year. Region totals are preserved, and tonnes only grow where the harmonized land has cropland of the respective crop group.

Usage

toolProjectFertilizerTg(
  fertilizerTgTarget,
  fertilizerTgInput,
  landMha,
  harmonizationYear
)

Arguments

fertilizerTgTarget

target fertilizer in Tg yr-1, provides the per-cluster tonnage anchor for the harmonization year

fertilizerTgInput

input fertilizer in Tg yr-1, containing the harmonization year and the years after it

landMha

harmonized land in Mha

harmonizationYear

integer year the input changes are measured from

Value

projected fertilizer in Tg yr-1 for the years after the harmonization year, clamped at zero, in the item order of fertilizerTgTarget

Author

Pascal Sauer