R/makkink.R
calc_makkink.RdThis function adds Makkink correction factors for ET and crop cover to the crop rotation table
calc_makkink(B_LU_BRP)A datatable with the crop dependent Makkink correction factor per month. Output is a single data.table with for each B_LU_BRP code the monthly correction factor. Columns of the data.table are: crop_makkink, month, year, mcf and crop_cover.
calc_makkink(B_LU_BRP = 265)
#> Key: <crop_makkink, month>
#> crop_makkink month year mcf crop_cover
#> <char> <int> <int> <num> <num>
#> 1: grasland 1 1 0.80 1
#> 2: grasland 2 1 0.90 1
#> 3: grasland 3 1 0.95 1
#> 4: grasland 4 1 1.20 1
#> 5: grasland 5 1 1.20 1
#> 6: grasland 6 1 1.20 1
#> 7: grasland 7 1 1.10 1
#> 8: grasland 8 1 1.10 1
#> 9: grasland 9 1 1.10 1
#> 10: grasland 10 1 1.00 1
#> 11: grasland 11 1 0.90 1
#> 12: grasland 12 1 0.80 1
calc_makkink(B_LU_BRP = c(265,1019))
#> Key: <crop_makkink, month>
#> crop_makkink month year mcf crop_cover
#> <char> <int> <int> <num> <num>
#> 1: grasland 1 1 0.80 1
#> 2: grasland 2 1 0.90 1
#> 3: grasland 3 1 0.95 1
#> 4: grasland 4 1 1.20 1
#> 5: grasland 5 1 1.20 1
#> 6: grasland 6 1 1.20 1
#> 7: grasland 7 1 1.10 1
#> 8: grasland 8 1 1.10 1
#> 9: grasland 9 1 1.10 1
#> 10: grasland 10 1 1.00 1
#> 11: grasland 11 1 0.90 1
#> 12: grasland 12 1 0.80 1
#> 13: overig 1 2 0.95 1
#> 14: overig 2 2 0.95 1
#> 15: overig 3 2 0.95 1
#> 16: overig 4 2 1.00 1
#> 17: overig 5 2 1.00 1
#> 18: overig 6 2 1.00 1
#> 19: overig 7 2 1.00 1
#> 20: overig 8 2 1.00 1
#> 21: overig 9 2 1.00 1
#> 22: overig 10 2 0.95 1
#> 23: overig 11 2 0.95 1
#> 24: overig 12 2 0.95 1
#> crop_makkink month year mcf crop_cover