Agronomic Efficiency (AE) — agronomic

Increase in economic yield per unit of nutrient applied.

agronomic_efficiency(
  yield_treated,
  yield_control,
  nutrient_applied,
  verbose = TRUE
)

Arguments

yield_treated: Numeric vector. Yield with nutrient applied (kg/ha).
yield_control: Numeric vector. Yield without nutrient, i.e., from control plot (kg/ha).
nutrient_applied: Numeric vector. Amount of nutrient applied (kg/ha).
verbose: Logical. If TRUE, prints informational messages. Default TRUE.

Value

Numeric vector. Agronomic efficiency (kg grain per kg nutrient).

Details

$$AE = \frac{Y_f - Y_0}{F}$$

References

Dobermann, A. (2007). Nutrient use efficiency: measurement and management. In Fertilizer Best Management Practices, IFA, Paris, pp. 1-28. https://digitalcommons.unl.edu/agronomyfacpub/316/

Fixen, P. et al. (2015). Nutrient/fertilizer use efficiency: Measurement, current situation and trends. In Managing Water and Fertilizer for Sustainable Agricultural Intensification, IFA/IWMI/IPNI/IPI, pp. 8-38.

Congreves, K.A. et al. (2021). Nitrogen use efficiency definitions of today and tomorrow. Frontiers in Plant Science, 12, 637108. doi:10.3389/fpls.2021.637108

Examples

agronomic_efficiency(yield_treated = 4500, yield_control = 3000,
                     nutrient_applied = 120)
#> Agronomic efficiency computed (kg/kg).
#> [1] 12.5