VNF: Calculate Virtual N Factor (VNF)

In NUETON: Nitrogen Use Efficiency Toolkit on Numerics

Calculate Virtual N Factor (VNF)

Description

The portion of the N that is released to the environment during the food production process and is not contained in the food that is consumed Calculate NUEFC using the formula: VNF = Nrec / Ncon

Usage

VNF(Nrec, Ncon)

Arguments

Nrec	N used to produce food item that ends up recycled
Ncon	N in food item that is consumed

Value

The calculated VNF value

References

Primary: Congreves, K. A., Otchere, O., Ferland, D., Farzadfar, S., Williams, S., & Arcand, M. M. (2021, June 4). Nitrogen Use Efficiency Definitions of Today and Tomorrow. Frontiers in Plant Science, 12. https://doi.org/10.3389/fpls.2021.637108 Secondary: Galloway, J. N., Winiwarter, W., Leip, A., Leach, A. M., Bleeker, A., and Erisman, J. W. (2014). Nitrogen footprints: past, present and future. Environ. Res. Lett. 9:115003. doi: 10.1088/1748-9326/9/11/115003

Examples

Nrec <- 7.314
Ncon <- 15.574
VNF(Nrec, Ncon)

NUETON documentation built on Nov. 14, 2023, 1:07 a.m.