NEWS
wefnexus 1.0.0 (2026-03-10)
Initial CRAN release
Water Module (7 functions)
water_use_efficiency() - WUE (kg/ha/mm)
water_productivity() - Physical and economic WP (kg/m3)
water_footprint() - Green, blue, grey WF decomposition
irrigation_efficiency() - Conveyance, application, overall, consumptive
crop_water_stress_index() - CWSI bounded 0-1
crop_water_productivity() - CWP (kg/m3) from ET
depleted_fraction() - Basin-level water allocation metric
Energy Module (10 functions)
energy_input() - 15-component energy input aggregation
energy_output() - Grain + straw energy with customizable coefficients
energy_use_efficiency() - EUE ratio
eroi() - Energy Return on Investment with interpretation
energy_productivity() - Yield per MJ input
energy_intensity() - MJ per kg yield
specific_energy() - MJ/ha/day for duration comparisons
net_energy() - Energy balance (output minus input)
energy_profitability() - Economic return per MJ
human_energy_profitability() - Labour energy amplification ratio
Food Module (8 functions)
food_productivity_index() - Composite yield-protein-calorie index
crop_yield_index() - Relative to check treatment
harvest_index() - Economic to biological yield ratio
land_equivalent_ratio() - Intercropping advantage (LER)
system_productivity_index() - Multi-crop system equivalent
caloric_yield() - kcal/ha output
protein_yield() - kg protein/ha
production_efficiency_index() - Yield per unit cost
Nutrient Module (8 functions)
agronomic_efficiency() - AE (kg yield increase/kg nutrient)
physiological_efficiency() - PE (yield/uptake increase)
recovery_efficiency() - RE (uptake increase/applied)
partial_factor_productivity() - PFP (total yield/applied)
internal_utilization_efficiency() - IUE (yield/total uptake)
nutrient_harvest_index() - NHI (grain/total plant nutrient)
nutrient_balance() - N-P-K input-output balance sheet
nutrient_use_efficiency() - Comprehensive single-call NUE report
Carbon Module (7 functions)
carbon_footprint() - Source-wise CF with IPCC AR6 GWP defaults
carbon_efficiency() - Yield per kg CO2-eq
carbon_sustainability_index() - CSI with sequestration offset
ghg_emission() - N2O/CH4/CO2 estimation (IPCC Tier 1)
soil_carbon_stock() - SOC stock (Mg C/ha)
carbon_sequestration_rate() - Annual SOC change
global_warming_potential() - GWP with AR6 values (100yr and 20yr)
Nexus Integration (8 functions)
normalize_minmax() - Min-max 0-1 scaling with inverse option
normalize_zscore() - Z-score standardization
nexus_index() - Weighted composite WEFNC index
nexus_tradeoff() - Correlation-based trade-off matrix
nexus_radar() - Spider/web chart visualization
nexus_heatmap() - Treatment x dimension heatmap
nexus_sustainability_score() - Categorized sustainability assessment
nexus_summary() - One-call complete nexus analysis from raw data
Dataset
arid_pulse_nexus - 6 CA treatments x 26 variables from western Rajasthan
Technical Notes
- GWP defaults updated to IPCC AR6: CH4 = 27, N2O = 273 (100-yr)
- India-specific grid electricity EF: 0.82 kg CO2/kWh (CEA 2023)
- All functions use
verbose = TRUE parameter (CRAN compliant)
- All
@return tags present in documentation
- No
cat()/print() outside if(verbose) blocks
- All examples executable (no
\dontrun)