Total Energy Input — energy

Computes total energy input for a cropping system from individual input components with energy equivalents.

energy_input(
  seed = 0,
  fertilizer_n = 0,
  fertilizer_p = 0,
  fertilizer_k = 0,
  fym = 0,
  pesticide = 0,
  diesel = 0,
  electricity = 0,
  human_labour = 0,
  machinery = 0,
  irrigation = 0,
  micronutrient = 0,
  biofertilizer = 0,
  solar_energy = 0,
  other = 0,
  verbose = TRUE
)

Arguments

seed: Numeric. Energy from seed (MJ/ha). Default 0.
fertilizer_n: Numeric. Energy from nitrogen fertilizer (MJ/ha). Default 0.
fertilizer_p: Numeric. Energy from phosphorus fertilizer (MJ/ha). Default 0.
fertilizer_k: Numeric. Energy from potassium fertilizer (MJ/ha). Default 0.
fym: Numeric. Energy from farmyard manure (MJ/ha). Default 0.
pesticide: Numeric. Energy from pesticides: herbicides, insecticides, fungicides (MJ/ha). Default 0.
diesel: Numeric. Energy from diesel fuel (MJ/ha). Default 0.
electricity: Numeric. Energy from electricity for irrigation (MJ/ha). Default 0.
human_labour: Numeric. Energy from human labour (MJ/ha). Default 0.
machinery: Numeric. Energy from machinery depreciation (MJ/ha). Default 0.
irrigation: Numeric. Energy for canal/pumped irrigation (MJ/ha). Default 0.
micronutrient: Numeric. Energy from micronutrient fertilizers (MJ/ha). Default 0.
biofertilizer: Numeric. Energy from biofertilizers (MJ/ha). Default 0.
solar_energy: Numeric. Energy from solar pumping systems (MJ/ha). Default 0.
other: Numeric. Any additional energy inputs (MJ/ha). Default 0.
verbose: Logical. If TRUE, prints informational messages. Default TRUE.

Value

Numeric. Total energy input (MJ/ha), computed as the sum of all individual energy input components.

Details

Formula: $$EI = \sum (Input_i \times EE_i)$$

References

Mittal, V.K. & Dhawan, K.C. (1988). Research manual on energy requirements in agricultural sector. Punjab Agricultural University, Ludhiana, India.

Chaudhary, V.P. et al. (2009). Energy auditing of diversified rice-wheat cropping systems in the Indo-Gangetic Plains. Energy, 34(9), 1091-1096. doi:10.1016/j.energy.2009.04.017

Examples

energy_input(seed = 250, fertilizer_n = 3600, fertilizer_p = 500,
             diesel = 2800, human_labour = 180, machinery = 1200,
             irrigation = 1500)
#> Total energy input: 10030 MJ/ha.
#> [1] 10030