Measures — Overview¶

All measures in the TargetEcon model, their targets, type (temporary/permanent), retention class, key cost and effect ranges, and mutual exclusion group membership.

N field measures¶

Code	Full name	Temp/Perm	Retention	N effect (kg N/ha/yr)	Cost driver	Page
CCS	Catch crops (spring)	Temp	TR	12–45 (soil × livestock)	Fixed (288–396)	CCS
CCW	Catch crops (winter)	Temp	TR	12–45 (soil × livestock)	Fixed (1,980–3,168)	CCW
EC	Energy crops	Temp	TR	34–51 (soil)	prodcost ± fixed	EC
IC	Intermediate crops	Temp	TR	14	Fixed (325)	IC
EW	Early sowing	Temp	TR	17	Fixed (200)	EW
N10	N norm reduction 10%	Temp	TR	0.1×0.18×Nhan(i)	Fixed (44.5)	N10
N20	N norm reduction 20%	Temp	TR	0.2×0.18×Nhan(i)	Fixed (178)	N20
SA	Set aside	Temp	TR	see differentiation_effects.inc	prodcost + 250 [+200]	SA
FO	Forestation	Perm	TR	leaching(i) − 8	prodcost − annuity [+200]	FO
LRl	Land retirement (low-lying)	Perm	NR	40	prodcost + 1,016 [+200]	LRl
LRh	Land retirement (high land)	Perm	TR	see differentiation_effects.inc	prodcost [+200]	LRh
BZ10	Buffer zone 10 m	Perm	SR	leaching(i) − 12	prodcost	BZ10
BZ20	Buffer zone 20 m	Perm	SR	leaching(i) − 12	prodcost	BZ20
WL	Constructed wetland	Perm	NR	90 (changed 2026-01-20)	prodcost + 3,486 [+200]	WL

P field measures¶

Code	Full name	Temp/Perm	P pathways	Main P effect	Cost (DKK/ha)	Page
PPC	Plant protection cap	Temp	Erosion	0.9 × erosion_field(i)	80 + 0.1×prodcost	PPC
NPB10	Near-field buffer 10%	Temp	Erosion + macropore + matrix	sum of pathways × 0.05	50	NPB10
NPB20	Near-field buffer 20%	Temp	Erosion + macropore + matrix	sum of pathways × 0.20	100	NPB20
OT	Overland transport	Temp	Erosion	0.5 × erosion_field(i)	200	OT
PWET	P wetland	Perm	Erosion	15 × PotV(i,"Pwet")	prodcost + 9,733/13,200	PWET
IBZ	In-stream buffer zone	Perm	Field-specific	IBZ_eff(i)	7,938	IBZ

Combined N+P measures¶

Code	N effect basis	P effect basis	Cost	Page
PPC_NPB10	none (only P)	0.9 × NPB10 P effects	PPC + 0.9×NPB10	Combined
PPC_NPB20	none	0.9 × NPB20 P effects	PPC + 0.9×NPB20	Combined
NPB10_OT	none	NPB10 P effects	NPB10 + OT	Combined
NPB20_OT	none	NPB20 P effects	NPB20 + OT	Combined
NPB10_BZ10	BZ10 N effect × BZ10pot × (1−SurfRet)	NPB10 P effects	50×(NPB10−BZ10 area) + prodcost×BZ10 area	Combined
NPB10_BZ20	BZ20 N effect × BZ20pot × (1−SurfRet)	NPB10 P effects	similar	Combined
NPB20_BZ10	BZ10 N effect × (1−SurfRet)	NPB20 P effects	similar	Combined
NPB20_BZ20	BZ20 N effect × (1−SurfRet)	NPB20 P effects	similar	Combined

Note: Combined measures in comb(j) (PPC_NPB10/20, NPB10/20_OT) have no N effect — they are pure P measures. Combined measures in comb2(j) (NPB_BZ combinations) have both N and P effects.

Infrastructure measures¶

Category	Types	Indexed by	Page
Mini-wetlands	MW1 (20 ha), MW2 (50 ha), MW3 (100 ha)	`mw1/2/3` location	MW
WWT upgrades	MBN, MBNDK, MBNDKF, MBNDKFe	Plant `p`	WWT
Stream: ochre traps	ochre	Watercourse `w`	Stream measures
Stream: sand traps	sand	Watercourse `w`	Stream measures
Stream: re-meandering	re_meandering	Watercourse `w`	Stream measures
Stream: raising	raising	Watercourse `w`	Stream measures
Trees on erosion stretches	trees	`ero_stretch`	Trees
Overflow treatment	—	Overflow point `pp`	Overflow

Key mutual exclusion groups¶

Set	Members	Rule
`mem(j)`	All measures except LRl	At most 1 per field
`mem2(j)`	All measures except LRh	At most 1 per field (also blocks VP2 permanent)
`lm(j)`	Land management measures	Incompatible with land retirement (me>0)
`bz(j)`	BZ10, BZ20	Incompatible with land retirement
`lr1(j)`	WL, FO	"Full" land retirement
`lr2(j)`	LRl, LRh	"Partial" land retirement
IBZ specific	BZ10, BZ20, LRh, LRl, WL, FO + VP2 equivalents	Specific exclusions for IBZ
WWT	MBN, MBNDK, MBNDKF, MBNDKFe	At most 1 per WWT plant
Stream	re_meandering + raising	Cannot combine on same watercourse

Notes on potential areas¶

PotV(i,j) is the eligible area (ha) for measure j on field i. Key determinants: - IniPotV(i) — total field area (denominator) - Countcy(i) — number of years with "acceptable" crops (max 5) - MarkAccess(i,cy) — crop code per year (some crops exclude implementation) - Measure-specific factors: lav(i), livestock(i), BZ10Pot, Vaadomrpot, etc.

Fields with crop code 0, 2, 3, 6, 8, 13, 16, 17, 21, 27, or 999 in 2018 (the most recent year) have all PotV = 0.